EPEI CalculatorEPEI Calculator
Every Part Every Interval scheduling
What EPEI Means
Every Part Every Interval estimates how often a mixed-model process can cycle through every part in the family without exceeding available capacity.
Want an editable copy?
Download the free EPEI (Every Part Every Interval) template — enter your part family's demand, cycle, and changeover times and it calculates run utilization and your EPEI interval. Opens in Excel and Google Sheets.
What is EPEI?
EPEI means Every Part Every Interval. It estimates how frequently a mixed-model process can produce every item in a part family while respecting available capacity, daily demand, run time, and setup time.
A shorter EPEI supports smaller lots, lower inventory, and faster replenishment. If the interval is too long, use the SMED Changeover Calculator to test setup reduction and the Kanban Card Calculator to size the replenishment loop.
Related tools
- SMED Changeover Calculator - reduce setup time to shorten the interval
- Kanban Card Calculator - size the replenishment loop that EPEI supports
- Process Capacity Sheet - verify process capacity before scheduling