How to use it
- Enter total units and elapsed production time.
- Choose minutes or hours and optionally enter scrap units.
- Calculate gross rate, good rate and scrap percentage.
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Convert observed unit counts and elapsed time into hourly gross and good-unit rates.
This calculator normalizes observed output over time and separates stated scrap from good units.
Hourly rate equals units divided by elapsed hours. Good units equal total units minus scrap units.
1,000 units in 8 hours with 50 scrap units equals 125 gross units/hour, 118.75 good units/hour and 5% scrap.
Scrap cannot exceed total output. A zero-output interval reports a zero scrap rate rather than dividing by zero.