When a miscellaneous demand row is created the part cost details, i.e. the cost elements, cost and hours values, are automatically retrieved by performing a posting control simulation based on the basic data and the posting control setup.
Once the miscellaneous demand row is created this activity can be used to add or modify the part cost details.
Note: If you make changes to the miscellaneous demand line this will initiate a new posting control simulation that will override any manually entered cost and hours values, but only for the cost elements that are automatically retrieved from the simulation.