Which of the following relationships must always be incorrect? A)Tolerances process variability control limits B)Process variability tolerances control limits C)Tolerances control limits process variability D)Process variability control limits tolerances E)Process variability

Question

Which of the following relationships must always be incorrect? A)Tolerances > process variability > control limits B)Process variability > tolerances > control limits C)Tolerances > control limits > process variability D)Process variability > control limits > tolerances E)Process variability

Quizplus · Accepted Answer

Tolerances represent the acceptable range of variability for a product or process, while control limits represent the range of variability that is expected to occur within a process. Process variability is the actual range of variability observed in a process. Tolerances should be wider than control limits, as they represent the acceptable range of variability for the product. However, process variability can be larger than control limits, indicating that the process is out of control and requires corrective action. Option C, where tolerances are greater than the control limits, goes against this logic and is therefore incorrect.

Which of the Following Relationships Must Always Be Incorrect