Applied Statistics and Probability for Engineers

16-8 ATTRIBUTE CONTROL CHARTS 625 16-8 ATTRIBUTE CONTROL CHARTS 16-8.1 PChart (Control Chart for Proportions) Often it is desira ...

626 CHAPTER 16 STATISTICAL QUALITY CONTROL These control limits are based on the normal approximation to the binomial distribu- ...

16-8 ATTRIBUTE CONTROL CHARTS 627 1 234567891011121314151617181920 0.1 0.2 0.3 0.4 0.6 LCL p UCL Sample number Sample fraction d ...

628 CHAPTER 16 STATISTICAL QUALITY CONTROL These control limits are based on the normal approximation to the Poisson distributio ...

16-8 ATTRIBUTE CONTROL CHARTS 629 (times n) of the corresponding elements of a Uchart. The use of a Cchart avoids the fractions ...

630 CHAPTER 16 STATISTICAL QUALITY CONTROL 16-9 CONTROL CHART PERFORMANCE Specifying the control limits is one of the critical d ...

16-9 CONTROL CHART PERFORMANCE 631 That is, the control chart will require two samples to detect the process shift, on the aver- ...

632 CHAPTER 16 STATISTICAL QUALITY CONTROL 16-29. Consider the control chart in Fig. 16-3. Suppose that the mean shifts to 74.01 ...

16-10 CUMULATIVE SUM CONTROL CHART 633 average of the jth sample. Then if  0 is the target for the process mean, the cumulative ...

634 CHAPTER 16 STATISTICAL QUALITY CONTROL indicated. Thus, the V mask forms a visual frame of reference similar to the control ...

16-10 CUMULATIVE SUM CONTROL CHART 635 1 3 A 234 ... i (a) 2 A A si θ O L U d P 1 4 si 51015202530 2 0 +2 +4 +6 (b) Observat ...

636 CHAPTER 16 STATISTICAL QUALITY CONTROL EXAMPLE 16-6 A Tabular CUSUM We will illustrate the tabular CUSUM by applying it to t ...

16-10 CUMULATIVE SUM CONTROL CHART 637 zero. It may be helpful to have an estimate of the new process mean following the shift. ...

638 CHAPTER 16 STATISTICAL QUALITY CONTROL For this scheme, we would usually select K 1 2 and H4 or H5. To illustrate how we ...

16-11 OTHER SPC PROBLEM-SOLVING TOOLS 639 Sample Diameter Sample Diameter 1 9.94 14 9.99 2 9.93 15 10.12 3 10.09 16 9.81 4 9.98 ...

640 CHAPTER 16 STATISTICAL QUALITY CONTROL observed defects. Furthermore, the first five defect categories on the Pareto chart a ...

16-12 IMPLEMENTING SPC 641 Conveyor speed Conveyor angle Solder wave height Preheat temperature Pallet loading method A statist ...

642 CHAPTER 16 STATISTICAL QUALITY CONTROL when the business is in trouble and later abandoned. Quality improvement must become ...

16-12 IMPLEMENTING SPC 643 Focus on continuous improvement.Constantly try to improve the production and service system. Involve ...

644 CHAPTER 16 STATISTICAL QUALITY CONTROL influence the number of defective units produced. To answer this question, we must co ...