Determining active changes

Teamcenter drops, rolls up, or carries forward changes to the new item revision, depending on the following conditions. (X indicates the baseline, which may be a unit number or date.)

Lower end	Higher end	Drop, roll up, or carry forward?	Explanation
<X	<X	Drop	The change was effective in the past with respect to the baseline and will not be effective in the future. The change is dropped.
<=X	>=X	Carry forward	The change is effective and remains effective to a certain point in the future. Beyond that point, the change is not configured and is therefore carried forward.
<=X	UP	Carry forward if Pending status or roll up if Secured status.	The change is effective and remains effective in the future. It can be rolled up into the next revision. However, if the incremental change is not released, it can be edited and such edits may be reverted. Therefore, if the status is Pending, changes are carried forward.
>X	>X,UP	Carry forward	The change is effective in the future, so is carried forward.

Note

Teamcenter supports discontinuous effectivity, with multiple out effectivities. If any of the effectivities is equal to or greater than the baseline effectivity, the change is considered active.

When you create the baseline, changes that are past effective are dropped, irrespective of status. For example, if you create a baseline at unit 25, there may be changes on an incremental change with effectivity on units 5 to 15. All these changes are dropped because they are past effective. If you subsequently change the effectivity of this incremental change to span or cross baseline unit 25, you must recreate the baseline to take the effectivity change into account.

Teamcenter determines if an effectivity is applicable in the current context. An item revision under incremental change may have several status objects attached to it, and the objects may be different types. A revision rule may have several entries configured by effectivity, and the entries may specify different status and effectivity types. To determine if an effectivity statement on an incremental change revision applies to the revision rule, Teamcenter checks that the combination of status type and effectivity type (date or unit) match an entry in the revision rule.