ABSTRACT
This chapter explains how equipment loss is calculated in total productive maintenance (TPM). Operating time is what most people refer to when speaking about equipment availability. Loading time is the daily (or monthly) operating time minus all forms of non-operating time — breaks in the production schedule, stoppages for routine maintenance, morning meetings, and other routine stoppages. Performance rate is based on the operating speed rate and the net operating time. Operating speed rate is the ratio of the ideal speed of the equipment to its actual speed. In TPM, the availability, performance, and quality figures are multiplied to arrive at a measurement of the overall operating condition of the equipment. This can be used for all types of equipment. In TPM, the overall equipment effectiveness is increased by reducing or eliminating losses that affect availability, losses that affect performance rate, and losses that affect the quality rate.
