Component CTP checks

The component CTP represents what you have left in addition to the end item’s ATP that is already included in the master plan of the component.

In other words, what you can build on top of the end item’s ATP. Component CTP and capacity CTP can be seen as Build to Promise.

Enabling component CTP checking

To enable component CTP checking, in the Items - Planning (cprpd1100m000) session, specify the following for the end item:

Note

Enterprise Planning performs the CTP check in the period between the CTP time fence and the CTP horizon. Beyond the CTP horizon, the CTP is considered to be infinite.

For component items, select the Critical in CTP check box in the Items - Planning (cprpd1100m000) session.

You cannot define the CTP time fence for the component, because the component has no unique CTP check. In addition, LN dynamically replaces the CTP Horizon field by the ATP Horizon for the same reason: for this component, only the ATP is used in the CTP check of the ATP’s parent item.

Example
  • ATP of A = 10.
  • ATP of B = 6.
  • Two pieces of B are required to produce a single piece of A.

If you perform an ATP check and a component-CTP check for item A, the result is 13 (ATP of A + 0.5*[ATP of B]).