Reduction Measures
Use
If it turns out during scheduling that the lead time of an order is longer than the time available between the basic dates then the system tries to shorten the lead time by applying reduction measures.
The system reduces the lead time of the order step by step and checks after every reduction whether the dates calculated lie within the basic dates. If this is the case the reduction is terminated.
You can define a maximum reduction time for each order type, plant and production scheduler in the scheduling parameters (Customizing for Shop Floor Control, by choosing Operations ® Scheduling ® Define Production Order Scheduling Parameters).
With every reduction step the system has to reschedule the whole order. We recommend that you keep the number of reduction steps as low as possible on performance grounds.
Reduction Strategy
You can assign a reduction strategy to each operation in the routing. You can use this strategy to specify which reduction measures are carried out in every step. You define the reduction strategies in Customizing for Shop Floor Control by choosing Operations ® Scheduling ® Define Reduction Strategies.
Reduction in an Operation
The following operation-specific reduction measures are possible:
You can specify for each reduction step by what percentage the queue time is to be reduced. However, the queue time may not be less than the minimum queue time.
Splitting up the operation between several employees or machines shortens the lead time.
By overlapping operations the overall lead time of the order is reduced.
The move time can be reduced to the minimum transport time.
The process-related wait time cannot be reduced.
Reduction in the Order
You can also authorize a reduction of the
Order Float (float before and after production). You can specify for each reduction step by what percentage the float is to be reduced for each reduction step. You make this setting in the scheduling parameters for each order type, plant and production scheduler (Customizing for Shop Floor Control, by choosing Operations ® Scheduling ® Define Production Order Scheduling Parameters).