Use this activity to run MRP and Master Schedule simulations with predefined supply and demand data stored in simulation profiles. You can review these profiles on the Simulation Profile - MRP Parts and Simulation Profile – Master Schedule Parts pages.
To perform these simulations, use either the Perform MRP Simulation assistant or the Calculate Master Schedule Level 1 assistant.
Just as with live MRP or Master Schedule calculations (scenario 1), if there are top-level parts planned with the Master Schedule, it is recommended to begin with a Master Schedule calculation. 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.
If Master Schedule–planned top-level parts exist, but the simulation is started with an MRP simulation, the process begins by exploding demands to MRP‑planned parts using the planned receipts already calculated for Master Schedule Level 1 parts in the selected Material Planning Scenario.
When you set the Simulation Source to Simulation Profile, the simulation uses only the data in the selected profile. It does not capture a live snapshot of the current situation. All supply, demand, and key planning parameters come directly from the simulation profile for the selected Material Planning Scenario.
This approach creates a consistent and repeatable simulation environment, making it ideal for comparing planning scenarios over time.
You can run MRP simulations for either a site or a planning network. However, Master Schedule Level 1 simulation can only be calculated at the site level.
These simulation jobs run as background processes and can be scheduled to execute at a later time.
As a result of this activity, MRP and/or Master Scheduling simulation are executed using the independent demands, open supply orders, on-hand inventory, and key planning parameters from the simulation profile without retrieving live system updates. The results provide a view of potential planning outcomes, without generating real supply proposals.