DRP Calculation and Processing
Like MRP, DRP reviews all sources of demand and supply at a given site and plans items in sequence by low-level code. A distribution item’s low-level code is based on the product structure attached to the item at the supply site. DRP and MRP calculations use the same algorithms. Calculations are the same when time-phasing supply and demand, netting requirements, planning supply, and reporting exception conditions.
Since source networks are to DRP what product structures are to MRP, the explosion logic is the same. DRP explodes source networks for distribution items, identifying the sites that supply this item and the percentage of the requirement to be satisfied by each, and generates intersite requests rather than planned orders.
See User Guide: QAD Manufacturing.
To project inventory balances and calculate net requirements, DRP tentatively reschedules intersite requests and plans all activity based on this schedule. It also generates action messages recommending actions a planner should take to execute the plan.
DRP creates intersite requests if there is a requirement at a site that meets the following criteria:
• The required item has a non-blank Order Policy and Plan Orders is Yes in Item Master Maintenance (1.4.1).
• The item’s Purchase/Manufacture code is D.
• A source network exists.
• The system has access to the source sites.
When DRP creates intersite requests, it schedules the shipment date at the shipping site and the due date at the receiving site. DRP calculates these dates using the lead times defined for the transportation network. If none are defined, the system retrieves the lead times defined for either the transportation code or the source network assigned to it.