The requirement date of a transaction is the original requested date that is adjusted by safety margins and calendar availability. ...

The requirement date of a transaction is the original requested date that is adjusted by safety margins and calendar availability. If in general you can't manually mitigate the delays calculated by master planning, and if you want master planning to create a feasible plan, then you also need to adjust the requirement date by the calculated delays. All transactions have an original requested date. By adjusting the requirement date by the calculated delays, you don't lose visibility into the original request.