Use this activity to run a Material Requirements Planning (MRP) simulation for a Material Planning Scenario other than scenario 1, based on the current live planning situation together with extra demands that do not exist in the live data. Open the Perform MRP Simulation assistant.
When the Simulation Source is Live Snapshot with Additional Demands, the simulation takes a snapshot of the live planning situation at the time the job runs, in the same way as the Live Snapshot simulation source, and then adds the additional demands defined on the simulation profile for the site and Material Planning Scenario. Use this simulation source to answer questions such as whether a possible new customer order can be covered on top of the demand that already exists.
Only the additional demands are read from the simulation profile. All other supply, demand, and planning parameters come from the live data, unless a planning lever is used to override the planning parameters for selected parts. Additional demands are defined on the Additional Demands tab on the Simulation Profile - MRP Parts page, and each demand is included only when its Include in Simulation toggle is enabled.
Because the live data is read at the time the job runs, two runs started at different times can give different results. When you need a fixed and repeatable baseline for comparing planning scenarios over time, use Simulation Profile as the Simulation Source instead.
Just as with a live MRP calculation, if there are top-level parts planned with the Master Schedule, it is recommended to begin with a Master Schedule Level 1 simulation for the same Material Planning Scenario. If all the top-level parts are MRP-planned, it is enough to start with an MRP simulation, because during the MRP process, when a child part is Master Schedule-planned, a Master Schedule calculation for that part is performed automatically.
Under Scenario Selection, select the Simulation Type and the Material Planning Scenario, and set the Simulation Source to Live Snapshot with Additional Demands.
You can run this simulation for a single Site or for a Planning Network. When you run it for a planning network, every site in the network is simulated, including sites that have no planning lever connected. For a site simulation, you can limit the run to a subset of parts under Selection, for example, by part, planner or buyer, product family, product code, commodity group, part type, lead time code, or low level code. Selective simulation is not available for a planning network simulation.
Under Parameters, select the Site or the Planning Network, depending on the simulation type. You can also specify the run date and the MRP horizon. The remaining options work as in a live MRP run, for example, Stop MRP on Error, Plan Safety Stock Receipt considering MRP Run Date, and Plan Alternate Component.
To override key planning parameters for selected parts during the run, for example, the planning method, safety stock, lot sizes, or primary supplier, select a Planning Lever for a site simulation or a Network Lever for a planning network simulation. For more information, refer to the About Planning Levers document.
Enable the Run Integrated with CRP toggle to calculate simulated machine and labor operation loads for the simulated supply.
This job is posted as a background job and can be scheduled for later execution.