Defects/Defectives

An undesirable effect that occurs in a process outside of what the customer wants (a.k.a. the voice of the customer or VOC) as defined in a process as a lower/upper  specification limit (LSL/USL). Something defective typically reflects the severity of how defective a unit is (i.e., by the number of defects it contains). 
Related StatStuff Video: 
   -Section 5-Measure Phase, Lesson #21 - Defining the VOC and Defects