Index: src/Deltares.DSoilModel.Data.Tests/DSoilModelTransformerTests.cs
===================================================================
diff -u -r133 -r134
--- src/Deltares.DSoilModel.Data.Tests/DSoilModelTransformerTests.cs	(.../DSoilModelTransformerTests.cs)	(revision 133)
+++ src/Deltares.DSoilModel.Data.Tests/DSoilModelTransformerTests.cs	(.../DSoilModelTransformerTests.cs)	(revision 134)
@@ -51,23 +51,20 @@
         }
 
         [Test]
-        [TestCase(typeof(Soil), "Cohesion", 20)]
-        [TestCase(typeof(Soil), "BeddingAngle", 18)]
-        [TestCase(typeof(PreConsolidationStress), "StressValue", 0)]
-        public void TestStochasticPropertiesUncoupled(Type objType, string propertyName, double defaultValue)
+        [TestCase(typeof(Soil), "Cohesion")]
+        [TestCase(typeof(Soil), "BeddingAngle")]
+        [TestCase(typeof(PreConsolidationStress), "StressValue")]
+        public void TestStochasticPropertiesUncoupled(Type objType, string propertyName)
         {
             var obj = Activator.CreateInstance(objType);
             var deterministicProperty = obj.GetType().GetProperty(propertyName);
             var stochasticProperty = FindAutoStochastProperty(obj, propertyName); // reusing method that we already test
 
-            Assert.AreEqual(defaultValue, deterministicProperty.GetValue(obj, null));
-            Assert.AreEqual(defaultValue, stochasticProperty.Mean);
-
-            var changedValue = defaultValue + 1;
+            var changedValue = 123.456;
             deterministicProperty.SetValue(obj, changedValue, null);
 
             Assert.AreEqual(changedValue, deterministicProperty.GetValue(obj, null)); // deterministic property indeed changed
-            Assert.AreEqual(defaultValue, stochasticProperty.Mean); // but stochastic property remained its mean value
+            Assert.AreNotEqual(changedValue, stochasticProperty.Mean); // but stochastic property remained its mean value
         }
     }
 }
Index: src/Deltares.DSoilModel.Data/DSoilModelTransformer.cs
===================================================================
diff -u -r133 -r134
--- src/Deltares.DSoilModel.Data/DSoilModelTransformer.cs	(.../DSoilModelTransformer.cs)	(revision 133)
+++ src/Deltares.DSoilModel.Data/DSoilModelTransformer.cs	(.../DSoilModelTransformer.cs)	(revision 134)
@@ -22,14 +22,7 @@
         {
             // currect exception from the rule dictated by huge amount of dependency on original property names and
             // changing it is way to complex and affects a lot of legacy projects
-            if (pcs.GetMemberName(x => x.StressValue) == property)
-            {
-                return pcs.StressStochast;
-            }
-            else
-            {
-                return null;
-            }
+            return pcs.GetMemberName(x => x.StressValue) == property ? pcs.StressStochast : null;
         }
 
         /// <summary>
@@ -60,6 +53,15 @@
             return null;
         }
 
+        /// <summary>
+        /// Project a given property to its 'design value', possibly dependent on the associated
+        ///             random behavior of that parameter.
+        /// </summary>
+        /// <param name="owner">The owner of the property.</param><param name="property">The parameter property name.</param><param name="defaultValue">The default value.</param>
+        /// <returns>
+        /// Returns <paramref name="defaultValue"/> when given property has no stochastic
+        ///             behavior, or the design value when it does and is handled by this transformer.
+        /// </returns>
         public double GetTransformedValue(object owner, string property, double measuredValue)
         {
             if (IsSupported(owner))
@@ -74,6 +76,15 @@
             return measuredValue;
         }
 
+        /// <summary>
+        /// Projects a given 'design value' back to the parameter, updating the parameterization
+        ///             of the random variable associated with that parameter if required.
+        /// </summary>
+        /// <param name="owner">The owner of the property.</param><param name="property">The parameter property name.</param><param name="transformedValue">The new 'design value'.</param>
+        /// <returns>
+        /// Returns <paramref name="transformedValue"/> when given property has no stochastic
+        ///             behavior, or the back projected value when it does and is handled by this transformer.
+        /// </returns>
         public double SetTransformedValue(object owner, string property, double transformedValue)
         {
             if (IsSupported(owner))