Downtime and breakdown losses (time losses) will be used for calculating the
availability of equipment. Meanwhile, speed losses are used to measure the
equipment efficiency. Additionally, defect/rework losses are considered as
quality losses and increasing number of defects and reworks reflect the quality
of products produced. Overall equipment effectiveness (OEE) is a function of
availability (A), performance efficiency (P) and quality rate (Q). The OEE
calculation can be simplified as, OEE = (A) x (P) x (Q).