Titlebook: Quality Control in Automation; Ken Stout Book 1985 Ken Stout 1985 control.design.maintenance.materials.quality.quality control.reliability

burnish

Cumulative Sum Charts,Alternative conditions may arise where the evidence for talking action is based on the result of several samples, which individually would not be significant. In the case presented here, a differing procedure must be found for accumulating this evidence. A charting method to achieve this was propose

奇思怪想

Reliability,hen the product ceases to function or, alternatively, to function ineffectively. Product reliability is a function of product design, whereas quality control is purely a manufacturing function. In a broad sense, the performance and/or reliability of a product may be considered as one of its quality

GRAVE

Pareto Analysis,auses. These repeated failures usually suggest that either design faults are responsible, or poor manufacture. More often than not, however, if repeated failures persist, then the fault is usually traced to a design problem. Since a small number of faults cause the majority of malfunctions, it is ne

荒唐

Variability when Sampling Gaussian and non-Gaussian Populations,le distribution is used as an estimate of the parent population, errors in analysis may result. (Distributions and how statistical techniques can be used with particular cases are discussed in Chapters 6 and 10.)

construct

Effect of Quality on the Economics of Assembly Processes,irtually impossible to guarantee 100% quality of components during manufacture, so it must be expected that defects will proceed to the assembly process. During manual assembly the operator can act as the inspector and discard any obvious faulty parts, thereby minimizing defective assemblies being p

新鲜

Selection and Effectiveness of Quality Engineers and Inspectors,ly, there is the temptation to devalue the role so as to minimize nonproductive costs, but this may lead to ineffective control and maintenance of standards. An equally ineffective solution would be to employ people who are overqualified to undertake the necessary role, and who through boredom becom

地牢

Obverse

Location and Scatter,alue of the distribution) and scatter (an indication of the variability of the members of the distribution). The most commonly used measures of location and scatter are known as the . and ., respectively.

Obligatory

Analysis of Variation,tained. A simple structure leads to a simple analysis, whilst a complex structure inevitably means a complex analysis. Some of the more common types of analysis are considered in this chapter so that the reader may become familiar with this useful technique, originally introduced by R. A. Fisher.

HAUNT

Selection and Effectiveness of Quality Engineers and Inspectors,e disenchanted with their job function. Also, the overqualified, over zealous inspector may start rejecting components for effects other than those to which he should address his attention, such action may not in fact improve the performance of the product.