According to the characteristics of the spandex fiber processing, presents designs of the compressed air system, nitrogen system, chilled water system and equipment selection in the mechanical power house of the plant.

According to personal realization of design, the author compares and analyzes old and new heating method on views of systematic features, heat load calculation and equipment selection.

Some fuzzy methods rise due to complexity of equipment selection process.

In order to put forward an efficient way to select the most appropriate machine tools among the alternative according to the production task,the paper constructs a comprehensive evaluation model for machine tool selection.

The conventional approaches to machine tool selection problem tend to be less effective in dealing with the impreciseness or vagueness nature of the linguistic assessment.