Any changes that are made to the model belong to the currently active scenario and the alternatives that it references. If the alternatives happen to have children, those children will also inherit the changes unless they have specifically overridden that attribute. The following figure demonstrates the effects of a change to a mid-level alternative. Inherited values are shown as gray text, local values are shown as black text.

The best way to determine is a value is local or inherited is to open the tab for that element in the in the Alternatives Manager (Analysis > Alternatives) and view the column designated "*”. There are three possible values:

• Yellow with a check - Base data
• White with no check - Inherited data from parent alternative
• White with a check - Local data which has been changed from parent alternative

See help topic "Overriding Inheritance" for an example of how inheritance works.

A Mid-level Hierarchy Alternative Change