Problem 21.2. An inspector reports a total of 16 defects out of a total batch size of 200 parts. On closer examination, it is determined that three of these reported defects were in fact good pieces, while a total of seven defective units were undetected by the inspector. What is the inspector’s accuracy in this instance? Specifically, what are the values of p1 and p2? (b) What was the true fraction defect rate?

True/False The self-preserving size distribution for particles undergoing thermal coagulation generally has a geometric standard deviation of about 1.3.

What is relation between product tolerance (engineering tolerance) and process variation.? Explain in some details showing some representation. Analyze the following study in terms: Components of variations and their contributions X Chart and R Chart

Problem 21.4. An inspector’s accuracy has been assessed as follows: p1 = 0.96 and p2 = 0.60. The inspector is given the task of inspecting a batch of 500 parts and sorting out the defects from good units. If the actual defect rate in the batch is 0.05, determine (a) the expected number of Type I and (b) Type II errors the inspector will make. (c) Also, what is the expected fraction defect rate that the inspector will report at the end of the inspection task.

Lusaka Engineering Company (LEC) had actual quality costs for the year ended December 31, 2022, as given below: Cost Element Amount ($) Prototype verification 300,000 Process acceptance 315,000 Product liability 618,750 Recalls 243,750 Retesting 187,500 Rework 375,000 Test labour 360,000 Vendor certification 600,000 At the zero-defect state, LEC expects to spend $375,000 on Prototype verification, $75,000 on Vendor certification, and $50,000 on Process acceptance. Assume sales to be $25,000,000. Required: (a) Prepare a Cost of Quality report for 2022 using the PAF Model. What does this report tell the management of LEC? (b) Prepare a Cost of Quality report for the Zero-Defect State using the PAF Model. Explain why quality costs still are present for the zero-defect state. (c) What if LEC achieves the zero-defect state reflected in the report in part (b), what are some of the implications of this achievement?