Whether a phase is calculated depends on the control key and the costing relevancy indicator of the phase.

1. Using the control key of the phase, you can specify whether the phase is relevant to costing.
2. If the phase is relevant to costing, you can additionally use a costing relevancy indicator to specify the factor that is to be used to calculate the services performed in a phase or you can disconnect the phase from costing. Operations are automatically excluded from costing.