An economic model for purchasing, owning and maintaining, induction motors

A method of assigning monetary value to induction motor design features and operating and maintenance practices is presented. The economic model can be implemented on a standard personal computer spreadsheet program and can be easily duplicated. The method is used to make better engineering decisions and communicate the reason to others. It is shown that assigning economic value to life expectancy enhancements along with the traditional first cost and energy consumption life costs enables the engineer to quantify quality. Present worth and probability theory are reviewed to assist in understanding the presentation