Production planning
Run MRP and review component requirements
Turn a production forecast into released production plans, then see the total component demand of all open plans against the stock on hand.
3 min readLast updated
In this article
MRP (material requirements planning) in Rocket ERP works from a forecast. You list the products you expect to make over a planning horizon, and the system creates the production plans for them. A second tab then adds up what all open plans need in components and compares it with your stock, so you know what to buy or make.
Before you start
Each forecast product needs an approved BOM. Products without one are skipped.
Demand from specific sales invoices is not pulled in automatically. When a plan serves a particular invoice, link it on that plan.
Run MRP
Open Manufacturing › Production Planning › Material Requirements Planning (MRP). The Run MRP tab opens.
Enter the Planning horizon (days), a whole number from 5 to 365. Plans start five days from today and end at today plus the horizon.
Under Forecast products, enter a Product and its Quantity. Select Add product for each additional product.
Select Run MRP.
The message MRP run completed appears with the result:
The number of plans created, and for each one its number, item and quantity.
The number of products skipped, with the reason for each, such as a missing approved BOM.
Component requirements of these plans, showing what the new plans will consume.
Each plan is created as Released with medium priority, so it is ready for Create work orders. Select View production plans to continue there. See Plan production and generate work orders.
Review component requirements
Select the Requirements tab.
Read one line per component:
Gross requirement: the total quantity the open plans need.
On hand: the stock in the plan's branch, less what is already reserved.
Net requirement: the gross requirement minus the stock on hand and minus what is already on its way: open work orders for the component and purchase orders not yet received.
Status: OK when the stock covers the need, Shortage when the net requirement is positive.
The line above the table shows how many plans were considered.
Common questions
Does MRP create purchase orders? No. It creates production plans and shows the shortages. Purchasing decides what to order.
Why was a product skipped? It has no approved BOM. Approve one, then run MRP again for that product.
Does running MRP move stock or post entries? No. It only creates plans and reads stock.