Lead Time Scheduling

Lead time scheduling can be carried out in a second step. Lead time scheduling calculates the concrete production dates. The system uses the times in the routing to carry out lead time scheduling.

Condition

To carry out scheduling and to generate capacity requirements various parameters must be set in Customizing.

You can find information on settings in Customizing necessary for carrying out capacity leveling in MRP and MPS in Settings and profiles for capacity leveling .

Scope of functions

In backward scheduling, the system first calculates backwards from the order finish date through the float after production to the production finish date. After this the individual operation dates are calculated backwards, starting from the last operation finish date. The first operation start date gives the start of production.

In forward scheduling the system starts from the current date and calculates through the float before production into the future. Then the individual operation dates are calculated starting from the first operation finish date and working forwards into the future.

You can specify whether lead time scheduling is to be carried out forwards or backwards in the parameters for detailed scheduling in Customizing for capacity planning or in Customizing for MRP.

In lead time scheduling there are three scheduling levels available for capacity planning:

With detailed scheduling you usually use the routing to carry out scheduling and capacity requirements planning for a BOM level. The lead time is divided up into the operation segments: setup, processing and teardown.

Production-rate scheduling is implemented in repetitive manufacturing. Production-rate scheduling is based on the times for the rate routing and is also carried out for a BOM level.

Rough-cut scheduling is based on the scheduling data in the rough-cut planning profiles and at a higher planning level (SOP) provides an initial overview of the capacity situation. The rough-cut planning profile represents a cumulation of the overall BOM structure.

You can find more information on scheduling levels, their setting in Customizing and on setting the scheduling parameters in Parameters for scheduling and calculating capacity requirements .

You will find more information in the document PP - Material Requirements Planning .