This study deals with the procedure of safety improvement, productivity increase, and tact-time reduction through setting up the system about preventive maintenance. Actually, it is hard to establish and carry out preventive maintenance, even though we recognize the importance of the system concerning time, cost, labor, and so forth. In this study in the viewpoint of cost we are for achieving maximum efficiency by change and reduction of planning process adapted to the special work group. At first we briefly will mention the kind, the necessity, and the concept of preventive maintenance, and then divide the equipment used in the assembly line into the two whether it is necessary or not by way of estimating the breakdown loss, comparing with general establishment of preventive maintenance and modifying it to the case. At the second step we will establish the operation system of plan management related to production and quality in the special case. Check period and category will be set by dividing the assembly equipment into LCL and Focus in the third step. The forth step will contain the operation procedure in detail. And then we must make check and repair record periodically. Finally, on the basis of the record the selection of checking of significance will be conducted. This results in safety improvement, tact time reduction, and productivity improvement.

Abstract
 1. 서론
  1.1 연구배경
  1.2 계획보전의 현황
  1.3 연구 방법
 2. 계획보전의 체제구축
  2.1 보전의 개념 및 분류
  2.2 계획보전의 단계와 현황
  2.3 적용사업장의 계획보전 체제구축의 실행단계
 3. 대상사업장의 계획보전 적용
  3.1 대상사업장의 단계별 계획보전
  3.2 계획보전을 통한 설비, 공수개선 및 TACT-TIME 단축유도
 4. 결론 및 추후 연구과제
 참고문헌

• 양두진
• 이창호