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What’s the right formula to calculate the Final Yield for a process that have 3 stations and on each station I calculate a Final Yield:
QTY manufactured: 1,000
QTY Rejected: 50
QTY reworked: 25
FPY = 950/1000 = 95%
FY = 975/1000 = 97.5%
QTY manufactured: 500
QTY Rejected: 25
QTY reworked: 10
FPY = 475/500 = 95%
FY = 490/500 = 98%
FY (for all process) = 1465/1500 = 97.66%
What would I get if a multiply the FY for station A and station B:
97.5% * 98% = 95.55% ??
Damaris: The folks here aren’t going to do your homework for you.
You need to ask yourself the question – “what answer am I interested in knowing? Do I care about how much is coming out of the process at the end compared to the beginning, or am I interested in how much is coming out the end that has not had any problems.” There is a difference. You should be able to figure out the answer yourself from this guidance.
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