Introduction to TPM

Calculating OEE

Overall Equipment Effectiveness is calculated from percentage scores for Availability, Performance, and Quality. These scores are obtained using the following formulae:

Availability = (Loading Time - Downtime) / Loading Time


Performance = ((Output x Actual Cycle Time) / (Loading Time - Downtime)) x (Ideal Cycle Time / Actual Cycle Time)


Quality = Number of Good Products / Input

where:

Number of Good Products = Input - (Start Up Defects + Process Defects + Trial Products)

These formulae provide us with the necessary information to calculate OEE as:

OEE = Availability x Performance x Quality



Agenda 2000