Simulation Mode (SAP Library - Carrying Out the Planning Run (PP-MRP-PR))

Simulation Mode

Use

Single-item, multi-level planning in simulative mode enables you to check the results during the planning run and to make adjustments. In contrast to planning with the parameter Display results before saving, the system displays problems with lower-level assemblies or with components on a higher-level or on the finished-product level and these can be solved immediately.

Prerequisites

You have selected the Simulation mode field in the initial screen for the single-item, multi-level planning run and started the planning run.

Features

All the materials in a BOM structure are planned top-down.

All changes are saved in the main memory. The results are not entered in the database until after changes are saved.

For problems with dates such as order dates in the past, the system sets an exception message in the planned order of the higher-level material or in the planned order of the finished product and displays the delay. If there is a delay, the system displays the total number of days that a planned order is delayed due to a problem with a lower-level assembly or component. The system displays this information in two additional columns in the planning result of the finished product.

If the start date of an assembly for a finished product is 3 days in the past and the start date of the component that is installed in the assembly is 5 days in the past, the system displays a delay time of 8 days in the planning result of the finished product.

Evaluation functions such as the order report and the pegging function enable you to quickly find the procurement element causing the delay or the exception message.
You can change the relevant procurement elements and repeat the planning run for the next lower level of the BOM. The system then automatically firms the changed MRP elements.