【单选题】68 An acceptance control chart has limits that are based on the spec. limits for the product rather than limits which differentiate between random and assignable causes. Under which of the following c...
B.
When the engineering tolerance on a dimension greatly exceeds the natural dispersion of the manufacturing process B. When the number of samples outside the current control chart limits become too costly and cumbersome to investigate.
C.
When a process is subject to constant but stable tool wear.
【简答题】The chart shows the number of days the average employee has off work per year in four different countries. Summarise the information by selecting and reporting the main features and by comparis...