MRP Pegged Requirements
MRP source-to-requirement pegging makes it possible to review each of the sources of demand for gross requirements. Use MRP Detail Inquiry (23.16) or MRP Detail Report (23.17; 23.41 for enhanced .NET UI version) to:
• Trace the requirement for a particular end item to the forecast or sales order creating the demand.
• Identify the specific parent item creating the need for a component item.
Pegging is made possible by low-level codes, which maintain a numeric value for each item relative to its parent item, including items planned across sites using DRP.
The lowest-level components of product structures in the database are assigned low-level codes of 0 (zero). Items at the next level are assigned a low-level code of –1, and so on.
Example: At a particular site, a purchased component has a low-level code of 0. That component is then built into an assembly, which is assigned a low-level code of –1. The assembly item is built into an end item that is assigned a low-level code of –2. The end item is then packaged and assigned a low-level code of –3.
When MRP is run across multiple sites in the same database, it processes lower-level items first, regardless of site. Purchase orders and intersite requests are generated after all site and intersite demand has been calculated.
Because item planning, product structure, MRP, and DRP transactions can alter low-level codes, net change and regenerative MRP automatically update low-level codes before performing calculations. Selective MRP updates low-level codes only if you set Resolve Low Level Codes to Yes. You can also use Low Level Code Update (23.22) to resolve codes as a separate
MRP Detail Inquiry (23.16) and MRP Detail Report (23.17; 23.41 for enhanced .NET UI version) display each source of demand for an item with the due date, item quantity, parent item number, and type of requirement—whether forecast, production forecast, sales order, customer schedule, work order, or repetitive.
Note: Run MRP reports and inquiries immediately after MRP, since they are sensitive to changes in inventory, demand, and supply.