Index: Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.cs
===================================================================
diff -u -r0dedee5ed4420b72929f83d86b139569fe8ee5cb -rd669c3342fcc3ef7cd94b231e962b827378fe0f6
--- Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.cs	(.../LengthEffectSettingsControl.cs)	(revision 0dedee5ed4420b72929f83d86b139569fe8ee5cb)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Controls/LengthEffectSettingsControl.cs	(.../LengthEffectSettingsControl.cs)	(revision d669c3342fcc3ef7cd94b231e962b827378fe0f6)
@@ -37,16 +37,19 @@
     {
         private const int lengthEffectNNrOfDecimals = 2;
 
-        private double b;
+        private readonly double b;
         private ScenarioConfigurationPerFailureMechanismSection scenarioConfigurationPerFailureMechanismSection;
 
         private bool isParameterAUpdating;
 
         /// <summary>
         /// Creates a new instance of <see cref="LengthEffectSettingsControl"/>.
         /// </summary>
-        public LengthEffectSettingsControl()
+        /// <param name="b">The 'b' parameter used to factor in the 'length effect' when determining
+        /// the maximum tolerated probability of failure.</param>
+        public LengthEffectSettingsControl(double b)
         {
+            this.b = b;
             InitializeComponent();
             InitializeToolTips();
         }
@@ -55,12 +58,9 @@
         /// Sets the data on the control.
         /// </summary>
         /// <param name="scenarioConfiguration">The scenario configuration to set on the control.</param>
-        /// <param name="b">The 'b' parameter used to factor in the 'length effect' when determining
-        /// the maximum tolerated probability of failure.</param>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="scenarioConfiguration"/>
         /// is <c>null</c>.</exception>
-        public void SetData(ScenarioConfigurationPerFailureMechanismSection scenarioConfiguration,
-                            double b)
+        public void SetData(ScenarioConfigurationPerFailureMechanismSection scenarioConfiguration)
         {
             if (scenarioConfiguration == null)
             {
@@ -69,7 +69,6 @@
 
             ClearLengthEffectErrorMessage();
 
-            this.b = b;
             scenarioConfigurationPerFailureMechanismSection = scenarioConfiguration;
 
             UpdateLengthEffectData();
Index: Riskeer/Common/test/Riskeer.Common.Forms.Test/Controls/LengthEffectSettingsControlTest.cs
===================================================================
diff -u -r0dedee5ed4420b72929f83d86b139569fe8ee5cb -rd669c3342fcc3ef7cd94b231e962b827378fe0f6
--- Riskeer/Common/test/Riskeer.Common.Forms.Test/Controls/LengthEffectSettingsControlTest.cs	(.../LengthEffectSettingsControlTest.cs)	(revision 0dedee5ed4420b72929f83d86b139569fe8ee5cb)
+++ Riskeer/Common/test/Riskeer.Common.Forms.Test/Controls/LengthEffectSettingsControlTest.cs	(.../LengthEffectSettingsControlTest.cs)	(revision d669c3342fcc3ef7cd94b231e962b827378fe0f6)
@@ -98,11 +98,10 @@
         public void SetScenarioConfiguration_ScenarioConfigurationNull_ThrowsArgumentNullException()
         {
             // Setup
-            var random = new Random(21);
             LengthEffectSettingsControl control = ShowLengthEffectSettingsControl();
 
             // Call
-            void Call() => control.SetData(null, random.NextDouble());
+            void Call() => control.SetData(null);
 
             // Assert
             var exception = Assert.Throws<ArgumentNullException>(Call);
@@ -124,7 +123,7 @@
             });
             var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
 
-            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl();
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
 
             // Precondition
             var parameterATextBox = (TextBox) GetParameterATextBoxTester().TheObject;
@@ -135,7 +134,7 @@
             Assert.IsEmpty(lengthEffectNRoundedTextBox.Text);
 
             // When
-            settingsControl.SetData(scenarioConfiguration, b);
+            settingsControl.SetData(scenarioConfiguration);
 
             // Then
             Assert.AreEqual("0,700", parameterATextBox.Text);
@@ -159,8 +158,8 @@
             });
             var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
 
-            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl();
-            settingsControl.SetData(scenarioConfiguration, b);
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetData(scenarioConfiguration);
 
             // Precondition
             var parameterATextBox = (TextBox) GetParameterATextBoxTester().TheObject;
@@ -189,8 +188,8 @@
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
             var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, random.NextRoundedDouble());
 
-            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl();
-            settingsControl.SetData(scenarioConfiguration, random.NextDouble());
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(random.NextDouble());
+            settingsControl.SetData(scenarioConfiguration);
 
             TextBoxTester parameterATextBoxTester = GetParameterATextBoxTester();
             parameterATextBoxTester.Enter("NotADouble");
@@ -218,8 +217,8 @@
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
             var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, random.NextRoundedDouble());
 
-            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl();
-            settingsControl.SetData(scenarioConfiguration, random.NextDouble());
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(random.NextDouble());
+            settingsControl.SetData(scenarioConfiguration);
 
             TextBoxTester parameterATextBoxTester = GetParameterATextBoxTester();
             parameterATextBoxTester.Enter("NotADouble");
@@ -251,8 +250,8 @@
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
             var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, random.NextRoundedDouble());
 
-            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl();
-            settingsControl.SetData(scenarioConfiguration, random.NextDouble());
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(random.NextDouble());
+            settingsControl.SetData(scenarioConfiguration);
 
             TextBoxTester parameterATextBoxTester = GetParameterATextBoxTester();
             parameterATextBoxTester.Enter("NotADouble");
@@ -266,7 +265,7 @@
             // When
             var newConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(FailureMechanismSectionTestFactory.CreateFailureMechanismSection(),
                                                                                            random.NextRoundedDouble());
-            settingsControl.SetData(newConfiguration, random.NextDouble());
+            settingsControl.SetData(newConfiguration);
 
             // Then
             errorMessage = errorProvider.GetError(parameterATextBox);
@@ -282,8 +281,8 @@
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
             var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, random.NextRoundedDouble());
 
-            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl();
-            settingsControl.SetData(scenarioConfiguration, random.NextDouble());
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(random.NextDouble());
+            settingsControl.SetData(scenarioConfiguration);
 
             TextBoxTester parameterATextBoxTester = GetParameterATextBoxTester();
 
@@ -325,8 +324,8 @@
             var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
             scenarioConfiguration.Attach(observer);
 
-            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl();
-            settingsControl.SetData(scenarioConfiguration, b);
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetData(scenarioConfiguration);
 
             // Precondition
             TextBoxTester parameterATextBoxTester = GetParameterATextBoxTester();
@@ -365,8 +364,8 @@
             var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
             scenarioConfiguration.Attach(observer);
 
-            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl();
-            settingsControl.SetData(scenarioConfiguration, b);
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetData(scenarioConfiguration);
 
             TextBoxTester parameterATextBoxTester = GetParameterATextBoxTester();
             const Keys keyData = Keys.Escape;
@@ -406,8 +405,8 @@
             });
             var scenarioConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
 
-            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl();
-            settingsControl.SetData(scenarioConfiguration, b);
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetData(scenarioConfiguration);
 
             // Precondition
             TextBoxTester parameterATextBoxTester = GetParameterATextBoxTester();
@@ -440,8 +439,8 @@
             });
             var oldConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) a);
 
-            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl();
-            settingsControl.SetData(oldConfiguration, b);
+            LengthEffectSettingsControl settingsControl = ShowLengthEffectSettingsControl(b);
+            settingsControl.SetData(oldConfiguration);
 
             // Precondition
             TextBoxTester parameterATextBoxTester = GetParameterATextBoxTester();
@@ -452,7 +451,7 @@
 
             // When
             var newConfiguration = new TestScenarioConfigurationPerFailureMechanismSection(section, (RoundedDouble) 0.7);
-            settingsControl.SetData(newConfiguration, b);
+            settingsControl.SetData(newConfiguration);
             oldConfiguration.NotifyObservers();
 
             // Then
@@ -487,8 +486,14 @@
 
         private LengthEffectSettingsControl ShowLengthEffectSettingsControl()
         {
-            var control = new LengthEffectSettingsControl();
+            var random = new Random(21);
+            return ShowLengthEffectSettingsControl(random.NextDouble());
+        }
 
+        private LengthEffectSettingsControl ShowLengthEffectSettingsControl(double b)
+        {
+            var control = new LengthEffectSettingsControl(b);
+
             testForm.Controls.Add(control);
             testForm.Show();
 
Index: Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsScenariosView.Designer.cs
===================================================================
diff -u -r38cc2066df6df5e409d0e160b35b0b1aa6fae54b -rd669c3342fcc3ef7cd94b231e962b827378fe0f6
--- Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsScenariosView.Designer.cs	(.../MacroStabilityInwardsScenariosView.Designer.cs)	(revision 38cc2066df6df5e409d0e160b35b0b1aa6fae54b)
+++ Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsScenariosView.Designer.cs	(.../MacroStabilityInwardsScenariosView.Designer.cs)	(revision d669c3342fcc3ef7cd94b231e962b827378fe0f6)
@@ -49,7 +49,6 @@
             this.listBox = new System.Windows.Forms.ListBox();
             this.calculationsTableLayoutPanel = new System.Windows.Forms.TableLayoutPanel();
             this.calculationSettingsGroupBox = new System.Windows.Forms.GroupBox();
-            this.lengthEffectSettingsControl = new Riskeer.Common.Forms.Controls.LengthEffectSettingsControl();
             this.dataGridViewControlGroupBox = new System.Windows.Forms.GroupBox();
             this.dataGridViewControlTableLayoutPanel = new System.Windows.Forms.TableLayoutPanel();
             this.labelTotalScenarioContribution = new System.Windows.Forms.Label();
Index: Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsScenariosView.cs
===================================================================
diff -u -r6a62fa4a5b55c1d92893c9346ac2d22efe3302cd -rd669c3342fcc3ef7cd94b231e962b827378fe0f6
--- Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsScenariosView.cs	(.../MacroStabilityInwardsScenariosView.cs)	(revision 6a62fa4a5b55c1d92893c9346ac2d22efe3302cd)
+++ Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsScenariosView.cs	(.../MacroStabilityInwardsScenariosView.cs)	(revision d669c3342fcc3ef7cd94b231e962b827378fe0f6)
@@ -30,6 +30,7 @@
 using Core.Common.Util.Extensions;
 using Riskeer.Common.Data.Calculation;
 using Riskeer.Common.Data.FailureMechanism;
+using Riskeer.Common.Forms.Controls;
 using Riskeer.MacroStabilityInwards.Data;
 using Riskeer.MacroStabilityInwards.Forms.PresentationObjects;
 using RiskeerCommonFormsResources = Riskeer.Common.Forms.Properties.Resources;
@@ -82,6 +83,7 @@
 
             InitializeObservers();
 
+            lengthEffectSettingsControl = new LengthEffectSettingsControl(failureMechanism.GeneralInput.B);
             InitializeComponent();
 
             InitializeListBox();
@@ -296,8 +298,7 @@
 
             if (selectedFailureMechanismSection != null)
             {
-                lengthEffectSettingsControl.SetData(selectedFailureMechanismSection.ScenarioConfigurationPerSection,
-                                                    failureMechanism.GeneralInput.B);
+                lengthEffectSettingsControl.SetData(selectedFailureMechanismSection.ScenarioConfigurationPerSection);
             }
         }
     }
Index: Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingScenariosView.Designer.cs
===================================================================
diff -u -r38cc2066df6df5e409d0e160b35b0b1aa6fae54b -rd669c3342fcc3ef7cd94b231e962b827378fe0f6
--- Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingScenariosView.Designer.cs	(.../PipingScenariosView.Designer.cs)	(revision 38cc2066df6df5e409d0e160b35b0b1aa6fae54b)
+++ Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingScenariosView.Designer.cs	(.../PipingScenariosView.Designer.cs)	(revision d669c3342fcc3ef7cd94b231e962b827378fe0f6)
@@ -57,7 +57,6 @@
             this.dataGridViewControl = new Core.Common.Controls.DataGrid.DataGridViewControl();
             this.calculationSettingsGroupBox = new System.Windows.Forms.GroupBox();
             this.calculationSettingsTableLayoutPanel = new System.Windows.Forms.TableLayoutPanel();
-            this.lengthEffectSettingsControl = new Riskeer.Common.Forms.Controls.LengthEffectSettingsControl();
             this.errorProvider = new System.Windows.Forms.ErrorProvider(this.components);
             this.radioButtonsPanel = new System.Windows.Forms.FlowLayoutPanel();
             this.radioButtonSemiProbabilistic = new System.Windows.Forms.RadioButton();
Index: Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingScenariosView.cs
===================================================================
diff -u -r231d49a3680dfdeef619dcaa26c743a093716c71 -rd669c3342fcc3ef7cd94b231e962b827378fe0f6
--- Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingScenariosView.cs	(.../PipingScenariosView.cs)	(revision 231d49a3680dfdeef619dcaa26c743a093716c71)
+++ Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingScenariosView.cs	(.../PipingScenariosView.cs)	(revision d669c3342fcc3ef7cd94b231e962b827378fe0f6)
@@ -31,6 +31,7 @@
 using Core.Common.Util.Extensions;
 using Riskeer.Common.Data.AssessmentSection;
 using Riskeer.Common.Data.Calculation;
+using Riskeer.Common.Forms.Controls;
 using Riskeer.Piping.Data;
 using Riskeer.Piping.Data.Probabilistic;
 using Riskeer.Piping.Data.SemiProbabilistic;
@@ -101,6 +102,7 @@
 
             InitializeObservers();
 
+            lengthEffectSettingsControl = new LengthEffectSettingsControl(failureMechanism.GeneralInput.B);
             InitializeComponent();
 
             InitializeCombobox();
@@ -442,8 +444,7 @@
 
             if (selectedFailureMechanismSection != null)
             {
-                lengthEffectSettingsControl.SetData(selectedFailureMechanismSection.ScenarioConfigurationPerSection,
-                                                    failureMechanism.GeneralInput.B);
+                lengthEffectSettingsControl.SetData(selectedFailureMechanismSection.ScenarioConfigurationPerSection);
             }
         }
     }