Data Management Capabilities > Managing Plans > Execution of Plans > Schedule Constraints During Execution
Schedule Constraints During Execution
There are some constraints in how Windchill handles EPP relationships. It is essential to understand the constraints to help you create and manage a plan. Constraints related to EPP are as follows:
Creation and Increase Indent
New and estimated activities are constrained to have the estimated start date same as or later than the actual start of their nearest parent
Activities with an earlier actual start date cannot be indented into activities with a later actual start date
Indenting or inserting an activity or a subplan as a child with estimated start date prior to its parent is restricted in an executing plan or summary activity
Indenting or inserting activity or subplan as a child is restricted in an executing plan activity
Deletion and Decrease Indent
Deleting the last remaining activity of an executing summary activity or plan is not supported
You cannot decrease indent of the last remaining activity of an executing summary activity or plan
You cannot decrease indent of an executing plan activity of a summary activity to convert the plan activity to a summary activity
Copy
Activities with an earlier estimated start date cannot be copied in summary activities with a later actual start date
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The tracking information of an activity is lost when an activity is copied to a summary activity.
Cut
Activities with an earlier estimated start date cannot be moved to in summary activities with a later actual start date.
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The tracking information of an activity is retained when it is moved within the same plan.
In a manual plan, processes involving delete or cut actions can cause a mismatch between estimated start date and actual start date of the parent activities.
The last remaining activity of an executing summary activity or plan cannot be moved to a summary activity using this action.
Microsoft Project (MSP) Import
The import of an MSP plan using sync mode is restricted if the actual start date of an activity or a plan is modified in MSP. The import can fail due to the following reasons:
Deleting an existing activity in MSP
Creating an activity in MSP
Modifying an existing activity
The import of a summary activity with a new or edited activity is restricted if the estimated start date of the activity is earlier than the actual start date of the summary activity.
The import of a summary activity is restricted if an executing summary activity is converted to a plan activity in MSP and imported back to Windchill.
The import of a plan activity is restricted if an executing plan activity is converted to a summary activity in MSP and imported back to Windchill.
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