Scheduling Levels (SAP Library)

Scheduling Levels

In Customizing for capacity planning you can centrally define the following for production orders, planned orders and orders in sales and operations planning (SOP) with the menu options Operations ® Scheduling:

Whether scheduling and/or finite scheduling should be carried out and on what level (detailed, production-rate or rough-cut).

What task lists (for examples, routings, rate routings, rough-cut planning profiles) are to be scheduled and on which scheduling level.

These settings allow you to generate capacity requirements for up to three levels for every order. Every order can be scheduled on every level. The capacity requirements can be evaluated on each of the three levels independently of one another.

To generate capacity requirements on all three scheduling levels the order has to be scheduled three times. That affects performance. So only set the indicators for those scheduling levels that you want to evaluate.

Three scheduling levels are available for capacity planning:

Detailed scheduling

Detailed scheduling is controlled by the parameters for detailed scheduling, which you can maintain in Customizing for capacity planning.

Production-rate scheduling

Rate-based planning is carried out on the basis of production rates. The scheduling instrument for rate-based planning is generally the rate routing. Rate-based scheduling is used mainly in repetitive manufacturing.

Rough-cut scheduling

Rough-cut scheduling is based on a rough-cut planning profile that contains cumulated data, for example, a work center from a work center hierarchy or a hierarchy root. Rough-cut scheduling is usually used from an SOP or MPS view, especially if it involves planning product groups.

You assign the task list to be used for scheduling (for example, routing, rate routing or rough-cut planning profile) by using a selection ID. By entering the selection ID, you specify the criteria used to determine the task list on which scheduling is based. The system takes the task list usage, task list type and task list status into account.

These control criteria are assigned to the material via the production controller.

Detailed scheduling is always used for production orders. If you have entered selection ID for rate-based scheduling or rough-cut scheduling for productions orders, a production order is scheduled appropriately if it is created manually (without converting a planned order).

The selection ID assigned to a planned order for detailed scheduling must match that of the production order into which the planned order is converted. When a planned order is converted to a production order, the system reschedules this new production order. The capacity requirements for rough-cut planning and rate-based planning are copied into the production order.

If you have selected indicators for several levels (for example, for the planned order) and if the basic dates have to be adjusted then you must use a key to specify the level on which the basic dates have to be adjusted. This level is scheduled first of all and the basic dates are determined. The other levels must then lie within these basic dates and do not affect the basic dates.

Please note the following points:

If the indicator for determining the dates is set then the operations are scheduled:

With detailed scheduling you can specify the scheduling direction explicitly with the parameters for detailed scheduling.
Backward scheduling is used with rough-cut scheduling and production-rate scheduling.

The other parameters required for scheduling are predefined and cannot be changed.

If the indicator for calculating capacity requirements is set then capacity requirements records are generated during scheduling. If the indicator is not set then no capacity requirements are generated.

If only the indicator for calculating capacity requirements is set then the system only calculates capacity requirements. In this case the capacity requirements are distributed over the whole duration of the order for all levels. That means that all the operations are parallel and get the dates of the order.