Material Requirements Planning > Reviewing MRP Output > Action Messages
  
Action Messages
MRP generates action messages for all items with non-blank order policies. Action messages recommend the actions a planner should take to balance supply with demand, such as rescheduling, canceling, or releasing orders.
Review action messages using Action Message Review/Update (23.5). Or use Action Message Report (23.7; similar information is available in the enhanced .NET UI Action Message Browse, 23.6) to review messages by item, site, buyer/planner, Pur/Mfg code, or action message number.
MRP Action Messages lists the messages generated by MRP with a brief explanation. In the explanation, a supply order can be a work order, purchase order, repetitive schedule, or intersite request.

MRP Action Messages
Message
Meaning
Beginning Quantity Less Than Zero
The initial nettable quantity on hand is negative.
Beginning Available Less Than Zero
The quantity on hand less safety stock is negative.
Create
A supply order should be created to satisfy a negative projected on-hand balance. This message is only generated if Plan Orders is No or if a new requirement appears within the time fence.
De-Expedite
A scheduled supply order is due before it is needed and should be delayed, or demand rescheduled to an earlier date.
Expedite
A scheduled supply order is due after it is needed and should be rescheduled to an earlier date, or demand rescheduled to a later date.
Cancel
A scheduled supply order is no longer needed and should be deleted.
Release Due For
A supply order should be released. You can release both planned and firm-planned orders. Approving the order changes its status to firm planned.
Use the Order Release Horizon field in MRP Control (23.24) to specify the number of days prior to the order release date for this action message to display.
Release Past Due For
A supply order was not released when it was due. It now needs to be released and expedited, or the demand must be rescheduled for a later date.
Quantity Less than Minimum
A supply order was created for a quantity less than the minimum quantity set in the item planning data.
Quantity Exceeds Maximum
A supply order was created for a quantity greater than the maximum quantity set in the item planning data.
Past Due
Scheduled supply order receipt is past the due date.
Time Fence Conflict
Unsatisfied material requirement exists inside the planning time fence for the item. MRP will not create planned orders within the time fence. You should either manually schedule and expedite orders to fill this demand or delay fulfillment of the requirement that created the demand.
Shipment Due
A shipment for an intersite request item is due. Action should be taken at the source site to ensure that the order is received on time.
Shipment Past Due
A shipment for an intersite request item is past due. You should either delay the orders that created the requirement for the item or expedite them when the item does arrive.
No Source Of Supply
A valid source network is not available for the date a DRP item is required. Either the item or item-site planning data does not reference a source network, or the source network is not effective on that date.
Planned Order Count Exceeds Maximum
An item/site combination generated the maximum number of planned orders. MRP currently cuts off the creation of orders for an item/site combination at 1000. Calculation for other items continues. This prevents runaway calculations caused by, for example, an incorrect item order quantity.