MRP requirements planning
A complete demand explosion including dynamic lot sizing following the MRP
successive planning concept is performed. In addition, the capacity requirements
resulting from the computed lot sizes are shown graphically.
The bill-of-material structure is defined with the graph
editor.
The data in the nodes denote (1.) offset time (2.) setup costs (3.) holding
costs.
Dynamic lot sizing is possible
with the Silver-Meal heuristic
or the exact Wagner-Whitin
procedure. Alternatively fixed
run-out times can be set or a lot-for-lot
procedure is available. Each product may be assigned a setup time and
a processing time. These data are used to construct the resource requirements
associated with a production plan.
Click on a bar in the resource requirements bar chart
to get more information about the products involved.
Symbols:
| k |
index of
products |
| P-k |
product
k |
| u(k) |
low level
code of product k |
Assumptions:
- a given bill-of-material structure
- deterministic data (incl. offset times)
Literatur:
- Krajewski/Ritzman (1996), Chapter 14
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