Enter the sum of all changeover times needed across every member of the product family and the time available for changeovers into the EPEI Calculator. The calculator will evaluate the EPEI.

## EPEI Formula

The following two example problems outline the steps and information needed to calculate the EPEI.

EPEI = CTP / ACT

Variables:

- EPEI is the EPEI ( )
- CTP is the sum of all changeover times needed across every member of the product family
- ACT is the time available for changeovers

To calculate the EPEI, divide the sum of all changeover times by the time available for changeovers.

## How to Calculate EPEI?

The following steps outline how to calculate the EPEI.

- First, determine the sum of all changeover times needed across every member of the product family.
- Next, determine the time available for changeovers.
- Next, gather the formula from above = EPEI = CTP / ACT.
- Finally, calculate the EPEI.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

sum of all changeover times needed across every member of the product family = 30

time available for changeovers = 50

EPEI = CTP / ACT** **= ?