Evaluation of the valid utilization degree of engine room

Synthetic evaluation of engine room is very complex, it can be related to: reliability and safety evaluation of engine room, system performance evaluation of engine room, environment evaluation of engine room (or discard evaluation of engine room), valid utilization degree evaluation of engine room, maintenance economy evaluation of engine room, maintenance degree evaluation of engine room in voyage, shipbuilding cost evaluation of engine room, consumed energy evaluation of engine room and synthetic evaluation of engine room. One of them, the evaluation of the valid utilization of engine room, will be discussed in this study. So for there has not been a suitable method to evaluate it up till now. A new mathematic model is constructed to resolve this problem using fuzzy function. This study will propose some useful information to designers for improving their design work and to users, for judging whether the design of engine room is good or bad.