7. DEFECT & REWORK LOSS

Defect/rework losses are defined as volume losses due to defects and rework (disposal defects), and time losses required to repair defective products to turn them into excellent products.

Generally, sporadic defects are easily fixed, so they are rarely left uncorrected. Chronic defects, in contrast, are often left as they are, because their causes are difficult to perceive and measures to correct them are seldom effective. Rework and repair items are also regarded as chronic defects, because modification worker-hours are required This loss affects Quality Rate, OEE & OPE