In Long term planning process the planned production quantities are entered for the planning year in a particular scenario. The Long term planning is executed for the scenario. This generates the planned activity requirements taking the activity quantities from the routing and multiplying with the planned production.
The activity requirements are then transferred to the controlling module as scheduled activity quantities. Thereafter you execute a plan activity reconciliation which will reconcile the schedule activity and the activity you have planned manually. The reconciliation program updates the scheduled activity quantity as the planned activity in the controlling module.