The table below describes the action messages displayed by the master scheduling system.
| Message | Description |
| Actual demand is past due (late shipment). | Generated anytime that the real demand in the form of customer orders, material requisitions, etc. is past due, relative to the master scheduling run date. |
| Past due released or firm planned SO. | Generated anytime that a supply is past due relative to the run date. |
| Negative projected available. | Generated when the projected balance goes negative due to insufficient supply. |
| Allocated exceeds on hand. | Generated when the quantity allocated or demanded is greater than the quantity on hand in inventory. |
| On hand is below the safety stock. | Generated when the quantity on hand in inventory falls below safety stock defined for the part in the Planning Data tab in the Inventory Part window. |
| Forecast ignored within demand time-frame. | If forecast is found inside demand time fence, it is ignored since only the actual demand is considered inside the demand time fence. |
| MS-plan is within the planned time-frame. | Generated when a master schedule receipt is found between the demand and planning time fence. |
| The system generated MS-plan has been set to zero within the planned time limit. | Generated when the system generated master schedule receipts are set to zero inside the planning time fence. |
| Max capacity exceeded in the period. | Generated when the maximum capacity is exceeded when generating a master schedule receipt. |
| Forecast consumed outside the forecast consumption window. | Generated when the forecast is consumed by actual or planned demand, outside the consumption window defined by the user for the part. |
| Insufficient unconsumed forecast to satisfy actual demand. | Generated when the unconsumed forecast is not sufficient to meet the actual demand. |
| Insufficient unconsumed supply to satisfy actual demand. | Generated when the unconsumed supply is not sufficient to meet the actual demand. |
| Imported forecast/plan demand is less than consumed forecast. | Generated when the forecast imported from the demand planning component is less than the existing consumed forecast for a given day. |
| Projected balance is below safety stock. | Generated when projected balance falls below the safety stock defined in inventory. |
| Min lot size > max cap/day. | Generated when the minimum lot size defined in inventory part is greater than the maximum capacity defined for level 1 master scheduled part. |
| Insufficient unconsumed forecast/supply to satisfy actual demand. Distribution order not created. | Generated when the supply site does not have sufficient forecast or supply to meet the demand from the demand site. |
| Order gap time was not considered in the period. | Generated when the remaining receipts load on to the forecast date without considering the order gap time. This will happen when the MS planner meets the planning time fence when going backwards in time from the forecast date, to create MS receipts according to the order gap time and max lot size specified in the inventory part. |
| No buildable structure/revision exists for alternate *. | Generated when planning a master schedule level 1 for a manufacturing part that has no valid product structure. A shop order requisition is not generated. |
| Distribution order not created. | If the picking lead time exceeds the fixed MS receipt date, a distribution order will not be created. |
| MS not executed. Part status is set to supplies not allowed. | Master scheduling calculation was not completed for this part, as the inventory part has the Supplies Not Allowed part status, which is not correct. |
| MS not executed. Part status is set to demands not allowed in supply site. | Master scheduling calculation was not completed for this part as the inventory part in the supply site has the Demands Not Allowed part status, which is not correct. |