Quality Control Management

Ranjit Roy's A primer on the Taguchi method PDF

By Ranjit Roy

ISBN-10: 0872638642

ISBN-13: 9780872638648

A transparent, easy and basically non-mathematical presentation, this useful consultant introduces you to the elemental suggestions, options and purposes of the well known Taguchi process. A Primer at the Taguchi procedure introduces the basic techniques of Taguchi experimental layout and exhibits engineers how you can layout, learn, and interpret experiments utilizing the Taguchi procedure for a variety of universal items and procedures. Written for production and construction engineers, in addition to layout engineers and bosses, this ebook explains the main useful how you can follow the Taguchi method. The Taguchi method of caliber: the facility of the Taguchi procedure indicates the way it will be utilized to an array of goods from cars to desktops. examine the extreme merits of establishing caliber into the layout, the center of the Taguchi method. a variety of real-world examples may help you notice how the Taguchi process works in various production functions. in the event you desire a extra rigorous statistical remedy, the book's operating appendices offer complete mathematical information on orthogonal arrays, triangular tables and linear graphs, plus absolutely labored recommendations to difficulties provided within the instance case reports.

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Example text

Consistency (reduced level of variation) favorably affects most common elements of quality. To customers, quality may include service after delivery, ease of assembly, product performance, frequency of maintenance, and so on. Our focus is the element of quality reflected by the performance of a product or service. The Taguchi approach for reducing variation in performance is a two-step process: 1. Make the product/process perform in the best manner most of the time (less deviation from the target).

But the concept of selecting the proper levels of design factors, and reducing the variation of performance around the optimum/target value, can be easily illustrated through an example involving only one factor. An electronic circuit that controlled the color characteristics of a television set was significantly influenced by the line voltage. The experimenter, wishing to select the right voltage, investigated the color quality at several input voltages. The influence of voltage variation on color quality is shown in Figure 3-3.

Before discussing how the Taguchi approach reduces the number of experiments, it is helpful to understand how all possible combinations result from a set of factors. Suppose we are concerned about one factor, A (say, temperature). If we were to study the effect of A on a product at two levels, say, 400°F and 500°F, then two tests become necessary: Level 1 = A1 (400°F) and Level 2 = A2 (500°F) Consider now two factors, A and B, each at two levels (A1, A2 and B1, B2). This produces four combinations because at A1, B can assume values B1 and B2, and at A2, B can again assume values B1 and B2.

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A primer on the Taguchi method by Ranjit Roy


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