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The MRP Run performed via this screen contains all the functionality of the global MRP run performed via the back end, with the exception that a fairly substantial performance penalty can be expected due to the constant report back on progress that the MRP run needs to communicate, whilst executing the supply demand analysis.


MRP will perform a supply and demand analysis, create planned replenishment orders and/or suggested actions on existing firm and released replenishment orders as required to balance the supply and demand.


Options exist to override part master order policies, keep planned orders, ignore safety stock or quarantine stock, include parts which are not new and ignore negative stock.  An option exists to automatically reschedule firm and released purchase and production orders.



A simulation Selective or Global MRP run can be performed.  If the "Simulation" check box is checked, both the "Supply" and "Demand" frames in the "Simulation" frame are enabled.


If the user does not select any of the options, the simulation Global or Selective runs are performed in the same manner as a normal Global or Selective run, with the exception that all replenishment orders suggested by MRP will have the abbreviation "SIM" (Simulation).


Options that can be selected in simulation mode can be divided into two categories, namely, supply and demand.


Supply Frame

A specific supplier can be included or excluded, all firmed and/or released supply orders can be included or excluded, and stock in non-MRP stores can be included.


Demand Frame

A specific customer and/or contract number can be included or excluded from the MRP run.  All firmed and/or released customer demands can be excluded from the MRP run.  The user can also include quotation customer demands with a percentage certainty that can be specified within a specified period.


Since the Run is performed online and allows for the selection of multiple parts that might include manufactured parts with large product structures and many planning levels, the time of the day during which selective runs are allowed, is governed by the settings on System Configuration.


The System Configuration settings, MRP Run After (Time) , MRP Run Before (Time) ,

MRP Simultaneous Runs (Max) ,  govern the "MRP Run Before" and "MRP Run After" times as well as the maximum number of simultaneous runs that will be allowed at any one time.


The function will constantly display the part number being processed, the level in the Product Structure and the number of parts to be processed on that level.  Should it reach a level that exceeds the Maximum Bill of Material levels as defined on System Configuration , the function will assume the possibility of a loop in the Product Structure and stop further processing of the MRP run.


The order numbers of planned orders are assigned from the System Configuration Number Control and the function will inform the user of the first and last planned order number inserted whilst processing the Selective MRP Run.


Automatic Release of Planned Purchase Orders

MRP will usually create planned orders except when the automatic release of purchase orders applies.  The following conditions must apply for automatic releases:


For purchased, fixed account parts where a buying record exists on the catalogue (external organisation part) and the unit of measure of the part and buying record is the same and the status is active and the External Organisations default currency equals the base currency,  get a record from the External Organisation Part Price table where the planned purchase order lines completion date is between the date from and the date to.


If the PO Auto Release Horizon Days is greater than zero, add the days to the current date to set the horizon end date.  If the planned, purchase order line completion date is less than or equal to the horizon end date, release the purchase order line and delete the planned order automatically.


Automatic Release of Planned Internal Production Orders

If Auto Release Days (Internal Orders) is greater than zero, add the days to the current date to set the horizon end date.  If the planned production order line start date is less than or equal to the horizon end date, and the part is a fixed account part, release the production order line and delete the planned order automatically.


If an internal production order, for an obsolete part, is automatically released, the planner of the part is informed via electronic mail.


NOTE: Also see JIT Item on the Part Master.



The user must have a security profile linked to the function MRP with an access allowed of Inquire.


Mrp Additional Options

Mrp Run Criteria

Mrp Run Execute

Mrp Run History