The present invention provides a method for controlling production or
manufacturing costs by obtaining yield measurements of unit manufacturing
for a multiplicity of products or production lines having a plurality of
processes which includes determining a started units number for the
plurality of processes. The method further includes determining a cost
per unit for each unit of the plurality of processes, and calculating an
expected approved units number for the plurality of processes. The
expected approved units number is calculated by multiplying the started
units number by an expected yield measurement. The method next includes
calculating an actual approved units number for each of the plurality of
processes by multiplying the started units number by an actual yield
measurement, and calculating an unapproved units number for each of the
plurality of processes by subtracting the expected approved units number
from the actual approved units number. The method then includes
calculating cost of yield measurements for the plurality of processes by
multiplying the unapproved units number by the cost per unit, and
providing a comparison of the cost of yield measurements for the
plurality of processes.