Component Scrap

Select Advanced Product Data Management (G3031), Planned Yield Update.

During manufacturing, material loss often occurs at operations. Examples of loss include evaporation or items damaged during move time. You can update the amount of materials and labor hours to account for operation loss by running Planned Yield Update.

For the operations that you select, this program uses the operational planned yield percent to update the cumulative percent for the routing instruction and to update the operation scrap percent for the bill of material.

You enter the operational planned yield percent value on the routing instruction. This value represents the planned output yield percent for a step. The system uses this value to adjust the operation scrap percent for the components at that step. Material Requirements Planning (MRP) uses the step scrap percent along with the existing component scrap percent to plan component demand.

The system updates the cumulative planned yield percent on the routing instruction. This value represents the item quantity that an operation is expected to produce. It is the ratio of usable output to input quantity. This value can be less than 100 percent, due to loss at one or more operations. The system calculates the cumulative yield in reverse of the operations' sequence. The system uses this value to increase the labor hours to make up for loss within the operation or to decrease labor hours if the cumulative planned yield percent is higher than 100 percent.

The system updates the operation scrap percent value on the bill of material. The operation scrap percent represents the expected amount of scrap material that is created at each operation. The system calculates this value by compounding the yield percentages from the last operation to the first operation. The system uses this value to increase or decrease the amount of materials to account for loss within the operation.