This research is devoted to develop and evaluate the alternative plans of the Plants Within Plants (PWP) case for improving productivity. Three alternative plans were made for the productivity improvement of the existing system of the case. The first plan was designed on the base of reducing work stations and reducing balance delay. The second plan has used the group working concept. The third plan has also applied the group working with the allowance time for compensating workers movements. The computer simulation method has been used for comparing and evaluating the existing system with three alternative plans. The simulation results have shown that the second one is superior to the other three lines in terms of low Work-In-Process(WIP) level and the high production output. The third plan has also shown the higher production output and lower WIP level than the existing one. In conclusion, applying group working concept to the PWP production environment could be the solution for increasing productivity.

Abstract
 1. 서 론
 2. 대상시스템의 구성과 연구과제
 3.실험방법의 결정
  3.1. 반복횟수의 결정
  3.2. 최적대안의 선택
 4. 시뮬레이션 결과 분석
  4.1. 미니탭을 이용한 paired T-test
  4.2. 최적 대안의 선택
 5. 결 론
 참 고 문 헌

• 황선문(전주대학교 산업공학과)