Editing the properties of a modification

1. Make sure the desired project is open (Editing basic settings of the project).

2. In the Edit project window, click the Modifications tab.

Note: Click the Select attributes symbol to show and hide columns (Selection of multiple attributes).

3. Make the desired settings in the list.

Element	Description
LoadOrder	Number specifying the sequence the modification is applied in. To change the numbers, click the symbols (Specifying the load order of modifications).
Code	Modification code
Description	Description of modification
Group	Use this field to enter text or select an existing group. You can use the Group property to sort modifications.
Depending on	A modification may be dependent on other modifications. For example, when you create a new PuT line on a link that you inserted in another modification. Click this button to select the modifications that are dependent on a modification. This has the following effect: If a scenario contains a dependent modification, all modifications that are dependent on it are also applied. Notes You can check the dependency between two modifications and thereby automatically select the respective entry in the column (Checking independence between two modifications). If a modification is dependent on another modification, which in turn is also dependent on a modification, the list is actually longer than displayed in this column. The columns Dependent on (completed) and Dependent on (completed, sorted by load order) list all modifications which have a dependent modification.
Exclusion	One modification might exclude other modifications. Click the respective button to select the modification of your choice. This settings has the effect that the excluding modifications cannot be applied to the same scenario. Note You can check the combinability of modifications and thereby automatically select the respective entry in the column (Checking combinability of modifications). If a modification is dependent on another modification that excludes a third modification, the exclusion will also apply to this modification. All modifications that are excluded are displayed in the Exclusion (completed) column.

Note: When you change exclusions and dependencies between modifications, Visum performs a few tests:

A modification cannot be dependent on another modification and at the same time exclude it, not even indirectly.
Two modifications used in the same scenario cannot exclude each other.
According to the load order, a dependent modification must be listed after the modification it is dependent on.