Index: Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.Designer.cs
===================================================================
diff -u
--- Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.Designer.cs	(revision 0)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.Designer.cs	(revision 40a40a6f35b1fdf12a7a926c3c5a9f6df7de4cb7)
@@ -0,0 +1,140 @@
+// Copyright (C) Stichting Deltares and State of the Netherlands 2023. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System.ComponentModel;
+using System.Windows.Forms;
+
+namespace Riskeer.Common.Forms.Controls
+{
+    partial class LengthEffectSettingsControl
+    {
+        /// <summary> 
+        /// Required designer variable.
+        /// </summary>
+        private IContainer components = null;
+
+        #region Component Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.tableLayoutPanel = new System.Windows.Forms.TableLayoutPanel();
+            this.parameterALabel = new System.Windows.Forms.Label();
+            this.lengthEffectNRoundedLabel = new System.Windows.Forms.Label();
+            this.lengthEffectNRoundedTextBox = new System.Windows.Forms.TextBox();
+            this.parameterATextBox = new System.Windows.Forms.TextBox();
+            this.lengthEffectErrorProvider = new System.Windows.Forms.ErrorProvider(this);
+            ((System.ComponentModel.ISupportInitialize) (this.lengthEffectErrorProvider)).BeginInit();
+            this.tableLayoutPanel.SuspendLayout();
+            this.SuspendLayout();
+            // 
+            // tableLayoutPanel
+            // 
+            this.tableLayoutPanel.ColumnCount = 2;
+            this.tableLayoutPanel.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
+            this.tableLayoutPanel.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
+            this.tableLayoutPanel.Controls.Add(this.parameterALabel, 0, 0);
+            this.tableLayoutPanel.Controls.Add(this.lengthEffectNRoundedLabel, 0, 1);
+            this.tableLayoutPanel.Controls.Add(this.lengthEffectNRoundedTextBox, 1, 1);
+            this.tableLayoutPanel.Controls.Add(this.parameterATextBox, 1, 0);
+            this.tableLayoutPanel.Dock = System.Windows.Forms.DockStyle.Fill;
+            this.tableLayoutPanel.Location = new System.Drawing.Point(0, 0);
+            this.tableLayoutPanel.Name = "tableLayoutPanel";
+            this.tableLayoutPanel.RowCount = 2;
+            this.tableLayoutPanel.RowStyles.Add(new System.Windows.Forms.RowStyle());
+            this.tableLayoutPanel.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 100F));
+            this.tableLayoutPanel.Size = new System.Drawing.Size(150, 150);
+            this.tableLayoutPanel.TabIndex = 0;
+            // 
+            // parameterALabel
+            // 
+            this.parameterALabel.AutoSize = true;
+            this.parameterALabel.Dock = System.Windows.Forms.DockStyle.Fill;
+            this.parameterALabel.Location = new System.Drawing.Point(3, 0);
+            this.parameterALabel.Name = "parameterALabel";
+            this.parameterALabel.Size = new System.Drawing.Size(35, 26);
+            this.parameterALabel.TabIndex = 0;
+            this.parameterALabel.Text = global::Riskeer.Common.Forms.Properties.Resources.LengthEffect_A_DisplayName;
+            this.parameterALabel.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
+            // 
+            // lengthEffectNRoundedLabel
+            // 
+            this.lengthEffectNRoundedLabel.AutoSize = true;
+            this.lengthEffectNRoundedLabel.Dock = System.Windows.Forms.DockStyle.Fill;
+            this.lengthEffectNRoundedLabel.Location = new System.Drawing.Point(3, 26);
+            this.lengthEffectNRoundedLabel.Name = "lengthEffectNRoundedLabel";
+            this.lengthEffectNRoundedLabel.Size = new System.Drawing.Size(35, 124);
+            this.lengthEffectNRoundedLabel.TabIndex = 1;
+            this.lengthEffectNRoundedLabel.Text = global::Riskeer.Common.Forms.Properties.Resources.LengthEffect_RoundedNSection_DisplayName;
+            this.lengthEffectNRoundedLabel.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
+            // 
+            // lengthEffectNRoundedTextBox
+            // 
+            this.lengthEffectNRoundedTextBox.Dock = System.Windows.Forms.DockStyle.Left;
+            this.lengthEffectNRoundedTextBox.Enabled = false;
+            this.lengthEffectNRoundedTextBox.Location = new System.Drawing.Point(44, 29);
+            this.lengthEffectNRoundedTextBox.Name = "lengthEffectNRoundedTextBox";
+            this.lengthEffectNRoundedTextBox.Size = new System.Drawing.Size(69, 20);
+            this.lengthEffectNRoundedTextBox.TabIndex = 2;
+            // 
+            // parameterATextBox
+            // 
+            this.parameterATextBox.Dock = System.Windows.Forms.DockStyle.Left;
+            this.parameterATextBox.Location = new System.Drawing.Point(44, 3);
+            this.parameterATextBox.Name = "parameterATextBox";
+            this.parameterATextBox.Size = new System.Drawing.Size(69, 20);
+            this.parameterATextBox.TabIndex = 3;
+            this.parameterATextBox.Enabled = false;
+            this.parameterATextBox.KeyDown += ParameterATextBoxKeyDown;
+            this.parameterATextBox.Leave += ParameterATextBoxLeave;
+            // 
+            // lengthEffectErrorProvider
+            // 
+            this.lengthEffectErrorProvider.BlinkStyle = System.Windows.Forms.ErrorBlinkStyle.NeverBlink;
+            this.lengthEffectErrorProvider.ContainerControl = this;
+            // 
+            // LengthEffectSettingsControl
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.Controls.Add(this.tableLayoutPanel);
+            this.Name = "LengthEffectSettingsControl";
+            this.tableLayoutPanel.ResumeLayout(false);
+            this.tableLayoutPanel.PerformLayout();
+            ((System.ComponentModel.ISupportInitialize) (this.lengthEffectErrorProvider)).EndInit();
+            this.ResumeLayout(false);
+
+        }
+
+        private System.Windows.Forms.Label parameterALabel;
+        private System.Windows.Forms.Label lengthEffectNRoundedLabel;
+        private System.Windows.Forms.TextBox lengthEffectNRoundedTextBox;
+        private System.Windows.Forms.TextBox parameterATextBox;
+
+        private System.Windows.Forms.TableLayoutPanel tableLayoutPanel;
+        private System.Windows.Forms.ErrorProvider lengthEffectErrorProvider;
+
+        #endregion
+    }
+}
\ No newline at end of file
Index: Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.cs
===================================================================
diff -u
--- Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.cs	(revision 0)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.cs	(revision 40a40a6f35b1fdf12a7a926c3c5a9f6df7de4cb7)
@@ -0,0 +1,195 @@
+// Copyright (C) Stichting Deltares and State of the Netherlands 2023. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.Windows.Forms;
+using Core.Common.Base;
+using Core.Common.Base.Data;
+using Core.Common.Base.Exceptions;
+using Core.Common.Base.Helpers;
+using Riskeer.Common.Data.FailureMechanism;
+using Riskeer.Common.Data.Probability;
+
+namespace Riskeer.Common.Forms.Controls
+{
+    /// <summary>
+    /// Control to display length effect properties.
+    /// </summary>
+    public partial class LengthEffectSettingsControl : UserControl
+    {
+        private const int lengthEffectNNrOfDecimals = 2;
+        private readonly double b;
+
+        private readonly Observer scenarioConfigurationObserver;
+        private ScenarioConfigurationPerFailureMechanismSection scenarioConfigurationPerFailureMechanismSection;
+
+        private bool isParameterAUpdating;
+
+        /// <summary>
+        /// Creates a new instance of <see cref="LengthEffectSettingsControl"/>
+        /// </summary>
+        public LengthEffectSettingsControl(double b)
+        {
+            this.b = b;
+
+            InitializeComponent();
+            scenarioConfigurationObserver = new Observer(UpdateLengthEffectData);
+        }
+
+        public void SetScenarioConfiguration(ScenarioConfigurationPerFailureMechanismSection scenarioConfiguration)
+        {
+            if (scenarioConfiguration == null)
+            {
+                throw new ArgumentNullException(nameof(scenarioConfiguration));
+            }
+
+            ClearLengthEffectErrorMessage();
+
+            scenarioConfigurationPerFailureMechanismSection = scenarioConfiguration;
+            scenarioConfigurationObserver.Observable = scenarioConfiguration;
+
+            UpdateLengthEffectData();
+
+            EnableControl();
+        }
+
+        /// <summary>
+        /// Clears the data on the control.
+        /// </summary>
+        public void ClearData()
+        {
+            isParameterAUpdating = true;
+            scenarioConfigurationPerFailureMechanismSection = null;
+
+            scenarioConfigurationObserver.Observable = scenarioConfigurationPerFailureMechanismSection;
+            ClearLengthEffectErrorMessage();
+            ClearLengthEffectData();
+
+            DisableControl();
+
+            isParameterAUpdating = false;
+        }
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+                scenarioConfigurationObserver.Dispose();
+            }
+
+            base.Dispose(disposing);
+        }
+
+        private void ParameterATextBoxKeyDown(object sender, KeyEventArgs e)
+        {
+            if (e.KeyCode == Keys.Enter)
+            {
+                parameterALabel.Focus(); // Focus on different component to raise a leave event on the text box
+                e.Handled = true;
+            }
+
+            if (e.KeyCode == Keys.Escape)
+            {
+                ClearLengthEffectErrorMessage();
+                UpdateLengthEffectData();
+                e.Handled = true;
+            }
+        }
+
+        private void ParameterATextBoxLeave(object sender, EventArgs e)
+        {
+            ClearLengthEffectErrorMessage();
+            ProcessParameterATextBox();
+        }
+
+        private void ProcessParameterATextBox()
+        {
+            if (isParameterAUpdating)
+            {
+                return;
+            }
+
+            try
+            {
+                scenarioConfigurationPerFailureMechanismSection.A = (RoundedDouble) DoubleParsingHelper.Parse(parameterATextBox.Text);
+                scenarioConfigurationPerFailureMechanismSection.NotifyObservers();
+
+                UpdateLengthEffectData();
+            }
+            catch (Exception exception) when (exception is ArgumentOutOfRangeException
+                                              || exception is DoubleParsingException)
+            {
+                ClearNRoundedData();
+                SetLengthEffectErrorMessage(exception.Message);
+                parameterATextBox.Focus();
+            }
+        }
+
+        private void ClearLengthEffectData()
+        {
+            parameterATextBox.Text = string.Empty;
+            ClearNRoundedData();
+        }
+
+        private void ClearNRoundedData()
+        {
+            lengthEffectNRoundedTextBox.Text = string.Empty;
+        }
+
+        private void UpdateLengthEffectData()
+        {
+            parameterATextBox.Text = scenarioConfigurationPerFailureMechanismSection.A.ToString();
+
+            double n = scenarioConfigurationPerFailureMechanismSection.GetN(b);
+            lengthEffectNRoundedTextBox.Text = new RoundedDouble(lengthEffectNNrOfDecimals, n).ToString();
+        }
+
+        private void SetLengthEffectErrorMessage(string errorMessage)
+        {
+            lengthEffectErrorProvider.SetIconPadding(parameterATextBox, 5);
+            lengthEffectErrorProvider.SetError(parameterATextBox, errorMessage);
+        }
+
+        private void ClearLengthEffectErrorMessage()
+        {
+            lengthEffectErrorProvider.SetError(parameterATextBox, string.Empty);
+        }
+
+        private void EnableControl()
+        {
+            parameterATextBox.Enabled = true;
+            parameterATextBox.Refresh();
+
+            lengthEffectNRoundedTextBox.Enabled = true;
+            lengthEffectNRoundedTextBox.Refresh();
+        }
+
+        private void DisableControl()
+        {
+            parameterATextBox.Enabled = false;
+            parameterATextBox.Refresh();
+
+            lengthEffectNRoundedTextBox.Enabled = false;
+            lengthEffectNRoundedTextBox.Refresh();
+        }
+    }
+}
\ No newline at end of file
Index: Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.resx
===================================================================
diff -u
--- Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.resx	(revision 0)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.resx	(revision 40a40a6f35b1fdf12a7a926c3c5a9f6df7de4cb7)
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file
Index: Riskeer/Common/src/Riskeer.Common.Forms/Riskeer.Common.Forms.csproj
===================================================================
diff -u -r1930606f48c2c45ef891fe6e249f9f3924cf3d63 -r40a40a6f35b1fdf12a7a926c3c5a9f6df7de4cb7
--- Riskeer/Common/src/Riskeer.Common.Forms/Riskeer.Common.Forms.csproj	(.../Riskeer.Common.Forms.csproj)	(revision 1930606f48c2c45ef891fe6e249f9f3924cf3d63)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Riskeer.Common.Forms.csproj	(.../Riskeer.Common.Forms.csproj)	(revision 40a40a6f35b1fdf12a7a926c3c5a9f6df7de4cb7)
@@ -80,6 +80,9 @@
     <Compile Update="Views\GeneralResultIllustrationPointView.cs">
       <SubType>UserControl</SubType>
     </Compile>
+    <Compile Update="Controls\LengthEffectSettingsControl.cs">
+      <SubType>UserControl</SubType>
+    </Compile>
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Update="Properties\Resources.resx">
Index: Riskeer/Common/test/Riskeer.Common.Forms.Test/Controls/LengthEffectSettingsControlTest.cs
===================================================================
diff -u
--- Riskeer/Common/test/Riskeer.Common.Forms.Test/Controls/LengthEffectSettingsControlTest.cs	(revision 0)
+++ Riskeer/Common/test/Riskeer.Common.Forms.Test/Controls/LengthEffectSettingsControlTest.cs	(revision 40a40a6f35b1fdf12a7a926c3c5a9f6df7de4cb7)
@@ -0,0 +1,493 @@
+// Copyright (C) Stichting Deltares and State of the Netherlands 2023. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.Windows.Forms;
+using Core.Common.Base;
+using Core.Common.Base.Data;
+using Core.Common.Base.Geometry;
+using Core.Common.TestUtil;
+using Core.Common.Util.Reflection;
+using NUnit.Extensions.Forms;
+using NUnit.Framework;
+using Rhino.Mocks;
+using Riskeer.Common.Data.FailureMechanism;
+using Riskeer.Common.Data.Test.FailureMechanism;
+using Riskeer.Common.Data.TestUtil;
+using Riskeer.Common.Forms.Controls;
+
+namespace Riskeer.Common.Forms.Test.Controls
+{
+    [TestFixture]
+    public class LengthEffectSettingsControlTest
+    {
+        private Form testForm;
+
+        [SetUp]
+        public void Setup()
+        {
+            testForm = new Form();
+        }
+
+        [TearDown]
+        public void TearDown()
+        {
+            testForm.Dispose();
+        }
+
+        [Test]
+        public void Constructor_LengthEffectControlsCorrectlyInitialized()
+        {
+            // Setup
+            var random = new Random(21);
+
+            // Call
+            ShowLengthEffectSettingsControl(random.NextDouble());
+
+            // Assert
+            var lengthEffectALabel = (Label) new LabelTester("parameterALabel").TheObject;
+            Assert.AreEqual("Lengte-effect parameter a [-]", lengthEffectALabel.Text);
+
+            var lengthEffectNRoundedLabel = (Label) new LabelTester("lengthEffectNRoundedLabel").TheObject;
+            Assert.AreEqual("Lengte-effect parameter Nvak* [-]", lengthEffectNRoundedLabel.Text);
+
+            TextBox lengthEffectNRoundedTextBox = GetLengthEffectNRoundedTextBox();
+            Assert.IsFalse(lengthEffectNRoundedTextBox.Enabled);
+        }
+
+        [Test]
+        [SetCulture("nl-NL")]
+        public void GivenControl_WhenSettingConfiguration_ThenControlUpdated()
+        {
+            // Given
+            const double a = 0.7;
+            const double b = 300.0;
+
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection(new[]
+            {
+                new Point2D(0, 0),
+                new Point2D(100, 0)
+            });
+            var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
+
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+
+            // Precondition
+            var parameterATextBox = (TextBox) GetParameterATextBox().TheObject;
+            Assert.IsEmpty(parameterATextBox.Text);
+            Assert.IsFalse(parameterATextBox.Enabled);
+
+            TextBox lengthEffectNRoundedTextBox = GetLengthEffectNRoundedTextBox();
+            Assert.IsEmpty(lengthEffectNRoundedTextBox.Text);
+
+            // When
+            settingsControl.SetScenarioConfiguration(scenarioConfiguration);
+
+            // Then
+            Assert.AreEqual("0,700", parameterATextBox.Text);
+            Assert.IsTrue(parameterATextBox.Enabled);
+
+            Assert.AreEqual("1,23", lengthEffectNRoundedTextBox.Text);
+        }
+
+        [Test]
+        [SetCulture("nl-NL")]
+        public void GivenControlWithConfiguration_WhenClearingData_ThenControlUpdated()
+        {
+            // Given
+            const double a = 0.7;
+            const double b = 300.0;
+
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection(new[]
+            {
+                new Point2D(0, 0),
+                new Point2D(100, 0)
+            });
+            var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
+
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetScenarioConfiguration(scenarioConfiguration);
+
+            // Precondition
+            var parameterATextBox = (TextBox) GetParameterATextBox().TheObject;
+            Assert.AreEqual("0,700", parameterATextBox.Text);
+            Assert.IsTrue(parameterATextBox.Enabled);
+
+            TextBox lengthEffectNRoundedTextBox = GetLengthEffectNRoundedTextBox();
+            Assert.AreEqual("1,23", lengthEffectNRoundedTextBox.Text);
+
+            // When
+            settingsControl.ClearData();
+
+            // Then
+            Assert.IsEmpty(parameterATextBox.Text);
+            Assert.IsFalse(parameterATextBox.Enabled);
+
+            Assert.IsEmpty(lengthEffectNRoundedTextBox.Text);
+        }
+
+        [Test]
+        public void GivenControlWithError_WhenClearingData_ThenErrorCleared()
+        {
+            // Given
+            var random = new Random(21);
+            RoundedDouble a = random.NextRoundedDouble();
+            double b = random.NextDouble();
+
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
+            var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, a);
+
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetScenarioConfiguration(scenarioConfiguration);
+
+            TextBoxTester parameterATextBoxTester = GetParameterATextBox();
+            parameterATextBoxTester.Enter("NotADouble");
+
+            // Precondition
+            ErrorProvider errorProvider = GetLengthEffectErrorProvider(settingsControl);
+            var lengthEffectATextBox = (TextBox) GetParameterATextBox().TheObject;
+            string errorMessage = errorProvider.GetError(lengthEffectATextBox);
+            Assert.IsNotEmpty(errorMessage);
+
+            // When
+            settingsControl.ClearData();
+
+            // Then
+            errorMessage = errorProvider.GetError(lengthEffectATextBox);
+            Assert.IsEmpty(errorMessage);
+        }
+
+        [Test]
+        public void GivenControlWithError_WhenEnteringValidData_ThenErrorClearedAndControlsUpdated()
+        {
+            // Given
+            var random = new Random(21);
+            RoundedDouble a = random.NextRoundedDouble();
+            double b = random.NextDouble();
+
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
+            var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, a);
+
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetScenarioConfiguration(scenarioConfiguration);
+
+            TextBoxTester parameterATextBoxTester = GetParameterATextBox();
+            parameterATextBoxTester.Enter("NotADouble");
+
+            // Precondition
+            ErrorProvider errorProvider = GetLengthEffectErrorProvider(settingsControl);
+            var lengthEffectATextBox = (TextBox) GetParameterATextBox().TheObject;
+            string errorMessage = errorProvider.GetError(lengthEffectATextBox);
+            Assert.IsNotEmpty(errorMessage);
+
+            TextBox lengthEffectNRoundedTextBox = GetLengthEffectNRoundedTextBox();
+            Assert.IsEmpty(lengthEffectNRoundedTextBox.Text);
+
+            // When
+            parameterATextBoxTester.Enter("0,7");
+
+            // Then
+            errorMessage = errorProvider.GetError(lengthEffectATextBox);
+            Assert.IsEmpty(errorMessage);
+            Assert.IsNotEmpty(lengthEffectNRoundedTextBox.Text);
+        }
+
+        [Test]
+        public void GivenControlWithError_WhenSettingData_ThenErrorCleared()
+        {
+            // Given
+            var random = new Random(21);
+            RoundedDouble a = random.NextRoundedDouble();
+            double b = random.NextDouble();
+
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
+            var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, a);
+
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetScenarioConfiguration(scenarioConfiguration);
+
+            TextBoxTester parameterATextBoxTester = GetParameterATextBox();
+            parameterATextBoxTester.Enter("NotADouble");
+
+            // Precondition
+            ErrorProvider errorProvider = GetLengthEffectErrorProvider(settingsControl);
+            var lengthEffectATextBox = (TextBox) GetParameterATextBox().TheObject;
+            string errorMessage = errorProvider.GetError(lengthEffectATextBox);
+            Assert.IsNotEmpty(errorMessage);
+
+            // When
+            var newConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(FailureMechanismSectionTestFactory.CreateFailureMechanismSection(),
+                                                                                           random.NextRoundedDouble());
+            settingsControl.SetScenarioConfiguration(newConfiguration);
+
+            // Then
+            errorMessage = errorProvider.GetError(lengthEffectATextBox);
+            Assert.IsEmpty(errorMessage);
+        }
+
+        [Test]
+        public void GivenControlWithoutError_WhenEnteringInvalidData_ThenErrorSetAndControlsUpdated()
+        {
+            // Given
+            var random = new Random(21);
+            RoundedDouble a = random.NextRoundedDouble();
+            double b = random.NextDouble();
+
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
+            var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, a);
+
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetScenarioConfiguration(scenarioConfiguration);
+
+            TextBoxTester parameterATextBoxTester = GetParameterATextBox();
+
+            // Precondition
+            ErrorProvider errorProvider = GetLengthEffectErrorProvider(settingsControl);
+            var lengthEffectATextBox = (TextBox) GetParameterATextBox().TheObject;
+            string errorMessage = errorProvider.GetError(lengthEffectATextBox);
+            Assert.IsEmpty(errorMessage);
+
+            TextBox lengthEffectNRoundedTextBox = GetLengthEffectNRoundedTextBox();
+            Assert.IsNotEmpty(lengthEffectNRoundedTextBox.Text);
+
+            // When
+            parameterATextBoxTester.Enter("NotADouble");
+
+            // Then
+            errorMessage = errorProvider.GetError(lengthEffectATextBox);
+            Assert.IsNotEmpty(errorMessage);
+            Assert.IsEmpty(lengthEffectNRoundedTextBox.Text);
+        }
+
+        [Test]
+        public void GivenControlWithConfiguration_WhenSettingNewAValue_ThenControlsUpdatedAndObserversNotified()
+        {
+            // Given
+            const double a = 0.4;
+            const double b = 300;
+
+            var mocks = new MockRepository();
+            var observer = mocks.StrictMock<IObserver>();
+            observer.Expect(o => o.UpdateObserver());
+            mocks.ReplayAll();
+
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection(new[]
+            {
+                new Point2D(0, 0),
+                new Point2D(100, 0)
+            });
+            var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
+            scenarioConfiguration.Attach(observer);
+
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetScenarioConfiguration(scenarioConfiguration);
+
+            // Precondition
+            TextBoxTester parameterATextBoxTester = GetParameterATextBox();
+            Assert.AreEqual("0,400", parameterATextBoxTester.Text);
+
+            TextBox lengthEffectNRoundedTextBox = GetLengthEffectNRoundedTextBox();
+            Assert.AreEqual("1,13", lengthEffectNRoundedTextBox.Text);
+
+            // When
+            parameterATextBoxTester.Enter("0,7");
+
+            // Then
+            Assert.AreEqual("1,23", lengthEffectNRoundedTextBox.Text);
+            mocks.VerifyAll();
+        }
+
+        [Test]
+        [SetCulture("nl-NL")]
+        public void GivenControlWithConfiguration_WhenSettingInvalidAValueAndEscPressed_ThenControlsSetToInitialValue()
+        {
+            // Given
+            var mocks = new MockRepository();
+            var observer = mocks.StrictMock<IObserver>();
+            mocks.ReplayAll();
+
+            const double a = 0.4;
+            const string initialAValue = "0,400";
+            const double b = 300;
+            const string lengthEffectNRoundedValue = "1,13";
+
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection(new[]
+            {
+                new Point2D(0, 0),
+                new Point2D(100, 0)
+            });
+            var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
+            scenarioConfiguration.Attach(observer);
+
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetScenarioConfiguration(scenarioConfiguration);
+            
+            TextBoxTester parameterATextBoxTester = GetParameterATextBox();
+            const Keys keyData = Keys.Escape;
+
+            var parameterTextBox = (TextBox) parameterATextBoxTester.TheObject;
+            parameterTextBox.TextChanged += (sender, args) =>
+            {
+                parameterATextBoxTester.FireEvent("KeyDown", new KeyEventArgs(keyData));
+            };
+
+            // Precondition
+            Assert.AreEqual(initialAValue, parameterATextBoxTester.Text);
+
+            TextBox lengthEffectNRoundedTextBox = GetLengthEffectNRoundedTextBox();
+            Assert.AreEqual(lengthEffectNRoundedValue, lengthEffectNRoundedTextBox.Text);
+
+            // When
+            parameterTextBox.Text = "NotAProbability";
+            
+            // Then
+            Assert.AreEqual(initialAValue, parameterATextBoxTester.Text);
+            Assert.AreEqual(lengthEffectNRoundedValue, lengthEffectNRoundedTextBox.Text);
+            mocks.VerifyAll();
+        }
+
+        [Test]
+        public void GivenControlWithConfiguration_WhenConfigurationNotifiesObservers_ThenControlsUpdated()
+        {
+            // Given
+            const double a = 0.4;
+            const double b = 300;
+
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection(new[]
+            {
+                new Point2D(0, 0),
+                new Point2D(100, 0)
+            });
+            var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
+
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetScenarioConfiguration(scenarioConfiguration);
+
+            // Precondition
+            TextBoxTester parameterATextBoxTester = GetParameterATextBox();
+            Assert.AreEqual("0,400", parameterATextBoxTester.Text);
+
+            TextBox lengthEffectNRoundedTextBox = GetLengthEffectNRoundedTextBox();
+            Assert.AreEqual("1,13", lengthEffectNRoundedTextBox.Text);
+
+            // When
+            scenarioConfiguration.A = (RoundedDouble) 0.7;
+            scenarioConfiguration.NotifyObservers();
+
+            // Then
+            Assert.AreEqual("0,700", parameterATextBoxTester.Text);
+            Assert.AreEqual("1,23", lengthEffectNRoundedTextBox.Text);
+        }
+
+        [Test]
+        public void GivenControlWithConfiguration_WhenDataClearedAndConfigurationNotifiesObservers_ThenControlsNotUpdated()
+        {
+            // Given
+            const double a = 0.4;
+            const double b = 300;
+
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection(new[]
+            {
+                new Point2D(0, 0),
+                new Point2D(100, 0)
+            });
+            var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
+
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetScenarioConfiguration(scenarioConfiguration);
+
+            // Precondition
+            TextBoxTester parameterATextBoxTester = GetParameterATextBox();
+            Assert.AreEqual("0,400", parameterATextBoxTester.Text);
+
+            TextBox lengthEffectNRoundedTextBox = GetLengthEffectNRoundedTextBox();
+            Assert.AreEqual("1,13", lengthEffectNRoundedTextBox.Text);
+
+            // When
+            settingsControl.ClearData();
+            scenarioConfiguration.A = (RoundedDouble) 0.7;
+            scenarioConfiguration.NotifyObservers();
+
+            // Then
+            Assert.IsEmpty(parameterATextBoxTester.Text);
+            Assert.IsEmpty(lengthEffectNRoundedTextBox.Text);
+        }
+
+        [Test]
+        public void GivenControlWithConfiguration_WhenSettingNewConfigurationAndOldConfigurationNotifiesObservers_ThenControlsNotUpdated()
+        {
+            // Given
+            const double a = 0.4;
+            const double b = 300;
+
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection(new[]
+            {
+                new Point2D(0, 0),
+                new Point2D(100, 0)
+            });
+            var oldConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
+
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetScenarioConfiguration(oldConfiguration);
+
+            // Precondition
+            TextBoxTester parameterATextBoxTester = GetParameterATextBox();
+            Assert.AreEqual("0,400", parameterATextBoxTester.Text);
+
+            TextBox lengthEffectNRoundedTextBox = GetLengthEffectNRoundedTextBox();
+            Assert.AreEqual("1,13", lengthEffectNRoundedTextBox.Text);
+
+            // When
+            var newConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) 0.7);
+            settingsControl.SetScenarioConfiguration(newConfiguration);
+            oldConfiguration.NotifyObservers();
+
+            // Then
+            Assert.AreEqual("0,700", parameterATextBoxTester.Text);
+            Assert.AreEqual("1,23", lengthEffectNRoundedTextBox.Text);
+        }
+
+        private TextBoxTester GetParameterATextBox()
+        {
+            return new TextBoxTester("parameterATextBox");
+        }
+
+        private TextBox GetLengthEffectNRoundedTextBox()
+        {
+            return (TextBox) new ControlTester("lengthEffectNRoundedTextBox").TheObject;
+        }
+
+        private static ErrorProvider GetLengthEffectErrorProvider(LengthEffectSettingsControl settingsControl)
+        {
+            return TypeUtils.GetField<ErrorProvider>(settingsControl, "lengthEffectErrorProvider");
+        }
+
+        private LengthEffectSettingsControl ShowLengthEffectSettingsControl(double b)
+        {
+            var control = new LengthEffectSettingsControl(b);
+
+            testForm.Controls.Add(control);
+            testForm.Show();
+
+            return control;
+        }
+    }
+}
\ No newline at end of file
Index: Riskeer/Common/test/Riskeer.Common.Forms.Test/Riskeer.Common.Forms.Test.csproj
===================================================================
diff -u -r230175547114c14da3d5516ace295d9d30cb4b04 -r40a40a6f35b1fdf12a7a926c3c5a9f6df7de4cb7
--- Riskeer/Common/test/Riskeer.Common.Forms.Test/Riskeer.Common.Forms.Test.csproj	(.../Riskeer.Common.Forms.Test.csproj)	(revision 230175547114c14da3d5516ace295d9d30cb4b04)
+++ Riskeer/Common/test/Riskeer.Common.Forms.Test/Riskeer.Common.Forms.Test.csproj	(.../Riskeer.Common.Forms.Test.csproj)	(revision 40a40a6f35b1fdf12a7a926c3c5a9f6df7de4cb7)
@@ -43,6 +43,7 @@
     <ProjectReference Include="..\..\src\Riskeer.Common.Primitives\Riskeer.Common.Primitives.csproj" />
     <ProjectReference Include="..\..\src\Riskeer.Common.Util\Riskeer.Common.Util.csproj" />
     <ProjectReference Include="..\Riskeer.Common.Data.TestUtil\Riskeer.Common.Data.TestUtil.csproj" />
+    <ProjectReference Include="..\Riskeer.Common.Data.Test\Riskeer.Common.Data.Test.csproj" />
     <ProjectReference Include="..\Riskeer.Common.Forms.TestUtil\Riskeer.Common.Forms.TestUtil.csproj" />
     <ProjectReference Include="..\Riskeer.Common.Service.TestUtil\Riskeer.Common.Service.TestUtil.csproj" />
   </ItemGroup>