Managing downtimes at the equipment level informs you on its performance and efficiency. It does not, however, offer any insights about how your downtimes affect your overall equipment effectiveness, hence the performance of, for example, planing as a process.
Overall equipment effectiveness (OEE) is used to measure the efficiency and effectiveness of equipment. OEE considers three factors: the availability and performance of your equipment, and the quality of its output.
Availability refers to the amount of time the equipment is available for production. This includes planned and unplanned downtimes, such as equipment maintenance, setup and changeovers, and unexpected breakdowns.
Performance refers to the speed at which the equipment is running compared to its theoretical maximum speed. Performance can be affected by factors such as operator skill, equipment design, and product specifications.
Quality refers to the amount of good products output by the equipment compared to the total amount of manufactured products. Quality can be affected by factors such as the raw material, equipment maintenance, and operator skill.
OEE = Availability × Performance × Quality
A perfect OEE score is 100 %, which means that the equipment is operating at full capacity with no downtime, producing good quality products at maximum speed. OEE is a better indicator of the performance of a process (e.g., sawing, planing) than equipment efficiency (although it’s important, too, for different reasons).
PMP TeamMate offers a complete battery of tools and reports to help you do that.