| # Yield type and quantity extra Quantity Planned Rejects The quantity extra is used to account for the product quantity that has disappeared in the operation, due to a limited yield. This is especially important when an operation is reported completed, in case the quantity completed must be automatically calculated. If the yield type is Discrete, the quantity extra is zero by definition. If the yield type is Continuous, the quantity extra is calculated from the scrap and yield of the operation, the planned quantity, and the quantities completed and rejected. Note The value of the Planned Rejects field increases proportionally with the sum of the Completed and Rejected fields. The scrap quantity, however, is added to the quantity extra immediately when the operation is started. Formulas The Planned Rejects field is calculated according to the following formulas:
    Quantity Extra = OP x QLY + SQ
OP: Operation progress QLY: Quantity expected to be lost due to limited yield SQ: Scrap Quantity (of the operation) The operation progress is defined by means of the following formula:
    OP = (QC + QR) / QPO
OP: Operation progress QC: Completed QR: Rejected QPO: Quantity Planned Output
    QLY = (1 - YP/100%) x (QPI - SQ)
QLY: Quantity expected to be lost due to limited yield SQ: Scrap Quantity (of the operation) YP: Yield Percentage QPI: Quantity Planned Input Related topics Examples of yield Yield Planned quantity to manufacture Scrap and yield |