Primary Resource

For APO, a process unit or part of a plant in which an operation is carried out. It is assigned for the duration of the operation in which all activities in the operation automatically receive the same primary resource as the operation. You maintain the usage of primary resources by specifying the duration of the activity. For PP, the primary resource is the processing unit or reaction vessel at which an operation is carried out. It is committed for the duration of the operation, which means that all the phases of this operation are automatically carried out at this primary resource.