Final answer:
Total rework is not a quality improvement approach like agile manufacturing, Six Sigma, or lean manufacturing; it signifies a corrective action, not a structured quality enhancement method.
Step-by-step explanation:
The approach that is NOT one of the approaches with regard to quality improvement among the options provided is total rework. The terms 'agile manufacturing,' 'Six Sigma,' and 'lean manufacturing' are all recognized methodologies for improving quality in production and organizational processes. Total rework, on the other hand, is not a systematic approach to quality improvement; it usually refers to a corrective action after a failure or defect has been identified, rather than a proactive, structured method for improving quality.
As for evaluating the quality of a design, engineers may focus on the attributes of the product, and testing prototypes is a crucial step in ensuring design quality. Both qualitative and quantitative methods can be used to evaluate design quality, and approaches like Six Sigma can provide a structured framework for this evaluation.