Abstract
The maintenance program for building equipments is basically done in time-based concept. The inspection periods are determined for each item which is composed of plural parts; however, this inspection interval is determined on experience-basis and its background is not necessarily clear. In order to rationalize the maintenance program, the application of available data such as failure reports given by customers, and inspection data reported at periodical maintenance is extremely important. Unfortunately, this information is not necessarily utilized sufficiently at this moment. In this research, we try to quantify risk by calculating failure rate of each maintenance item using statistical method and by defining consequence accompanied by failure. Finally, we develop the method of optimizing the maintenance program based on risk.
