The execution time of an operation is here defined as the sum of the times for setup, processing and repeated setup during processing. This can be expressed with the following formula:
F = SET + RUN * LOT / B + SET2 * ( ( LOT - 1) DIV SI
The meaning of the formula parameters and the origins of their values are given in the table below.
Formula Parameter |
Meaning |
Origin |
B |
Base quantity |
General operation value |
LOT |
Lot size |
General operation value |
SI |
Setup interval |
Standard value or Formula constant |
RUN |
Processing time for base quantity |
Standard value |
SET |
Setup time before processing |
Standard value |
SET2 |
Setup time during processing |
Standard value |
The setup interval is here the number of items that are produced before setup is repeated.
You can assign just one operation segment, for example the processing segment, a formula to calculate the execution time of the whole operation. You do not assign formula to the other segments
Calculations with Several Formulas
Since the program adds together the times of two segments, you can use two formulas, F1 and F3 for the segments.
Operation segment set-up: |
F1 = SET |
Operation segment processing: |
F3 = RUN * LOT / B + SET2 * (( LOT - 1)) DIV SI) |
This is useful, if you are interested in the times of the individual segments.
Note
The formulas and parameters used here, F, F1, F3, B, LOT, etc. are only valid in this example. In the SAP standard system formulas and parameters are defined for various applications with different formula key words and parameter IDs.