Running MRP

Outcomes of running MRP

The results of the MRP calculations can be seen:

In the MRP window.

Current and projected stock levels can be viewed. Action can be taken on recommendations made by the routine.

Note: MRP does not consider alternative stock items in its calculations.

In a text file in a folder of the company's Attachments path. If you do not know the path to use, contact your system administrator. The file name is <company name>_MrpOutputLog.txt.

You can view the log file and check the details. You can also send it via email to other users.

Demands are grouped by product and sorted by order date.
Sales orders which are linked, are processed as precise quantity and are excluded from MRP ordering and batch rules.
Replenishment is listed on a new line for each stock item that has a replenishment value.

Note: If a valid warehouse for obtaining replenishments is not available, this is reported as an error in the log file.

If the Treat Overdue Purchase Orders as due for delivery today setting is selected on the MRP tab in Planning Settings, purchase orders that are overdue on the MRP Horizon Date are listed as Exceptions in the MRP output log.
Once all demands have been processed, MRP explodes estimatesForecast project costs, based on expected costs of labour, machinery and operation times. In Manufacturing, estimates are produced for one-off items or non-repetitive batches. and BOMA stock assembly and process costing system, which provides facilities to specify the structure of finished items in terms of sub-assemblies and components.s to the next level. All phantomA BOM that is not used as as a stock component or in raising works orders. A phantom BOM is created and structured to contain groups of components, like a standard BOM. It is used in printed reports on stock structures. It can be used to collapse the sub-assemblies to reduce work in progress (WIP) and lead-time. It operates as a standard sub-assembly. However, the product code for the finished item does not appear on a higher level works order. Within Manufacturing, the components and operations of phantoms (and nested phantoms) are added to the top-level works order. These components and operations are given a sequence number of zero. In some manufacturing systems, phantom BOMs are employed instead of effectivity dates, to use up old stock before introducing replacement parts. If so, the old item is created as a phantom with the new item, the child of the old. Old stock is used up before new stock is ordered. When a phantom has zero stock, it is deleted and the new item is made part of the original BOM. Phantom BOMs are also known as non-returnable assemblies and blow-throughs. BOMs are blown through a level. Exploded demands are added to the MRP considerations.

To run MRP

Open: Planning > MRP > Processing > Run MRP.

Specify how you want to run MRP, by entering the following information.

Horizon Date	The cut-off date for processing demands defaults to the date entered when demands were last read using MPSMaster Production Schedule (MPS). The planning of production (usually end item production), to satisfy current and forecast sales orders. The sum of MPS items must equal the agreed sales and operations plan for the items over each planning period. Planning periods are normally a month or a four week period. Items planned within MPS are exploded by MRP (Materials Requirements Planning) to produce the material and capacity requirements.. Note: Items with a due date after this date are ignored.
Production safety lead time	This defaults to the number of days defined on the MRP tab in Planning Settings. It adds a number of working days to the lead time of every works orderThe authority to produce a part using the components specified on a BOM and the process specified on the routing. recommendation. You can change the default, if required.
Purchase safety lead time	This defaults to the number of days defined on the MRP tab in Planning Settings. It adds a number of working days to the lead timeThe number of working days elapsing between placing an order for an item and taking delivery. of every purchase order recommendation. You can change the default, if required.
Replenishment Horizon	This defaults to the number of days defined on the MRP tab in Planning Settings. It adds a number of calendar days to due dates to find the horizon for replenishments. You can change the default, if required. Note: Use the Replenishment Horizon (days) box on the Manufacturing tab of Stock Item Details to store the horizon values for individual stock items. The stock item replenishment horizon value overrides replenishment values entered in Manufacturing.
Aggregate Demand	Select the Aggregate Demand check box to group together demand for like products in a product time bucketA time period (for example, a day) in which all demands or requirements are added together and treated as one.. The product time bucket is determined from the Aggregate Demand (days) value set on the Manufacturing tab of Stock Item Details. If you select Aggregate Demand, the method of aggregating demand defaults to the method specified on the MRP tab in Planning Settings. Note: Sales orders which are linked with batch works orders are not included in aggregated demand.
Include demand from	Choose which items are included. Note: We recommend you include demands from all sources.
Include replenishments from	Choose which replenishments are included. Note: We recommend you include replenishments from all sources.
Ranges	Choose the product ranges over which MRP is run. Note: We recommend you choose ranges which cover all information.

To run MRP, click OK.