The objective of this research is to introduce key performance indicators (KPIs) measuring overall equipment effectiveness (OEE) or overall operation effectiveness (OOE) effectively. OEE is one of the most effective KPI to measure the productivity and quality levels of an equipment-centric manufacturing company and widely implemented with a spreaded TPM (total productive maintenance). OEE is the most representative time-related KPI. For ease of measurement, OEE is calculated on the basis of the quantity of the processing materials and theoretical cycle time instead of using time-related sub-indicators. Hence, setting up theoretical cycle times is the most important aspect of the OEE measurement. Increasing customer's demand and developed manufacturing technology, more products can be made in a machine. So there will be multiple theoretical cycle times in a machine, but they have not been extensively considered for setting up theoretical cycle times in previous research. Futhermore the limitation to measure a performance of an operation which is consists of multiple machines is often mentioned in previous research. This paper shows how to measure OOE based on multiple theoretical cycle time.

Abstract
 1. 서론
 2. 유관 연구 사례
  2.1 재질과 공법의 차이를 반영한 설비종합효율
  2.2 공장 전체의 성과 지표
 3. 생산제품의 재질과 공법을 감안한 공정 단위의 종합효율 측정 방법
  3.1 설비 배치의 특성
  3.2 동일 공정 내 복수 설비의 병렬배치
 4. 결론 및 향후연구과제
 Reference

• 배재호(혜천대학교 물류유통정보과)