Rating: Summary: Applies common sense to solving tough quality problems. Review: As a practitioner of the Shainin techniques, I found the book to be a very basic primer of what kinds of gains can be made by using Dorian's techniques. Many mainstream quality practitioners dismiss Dorian Shainin's techniques as not following "the rules," or not using "rigorous" methods, or even worse, not understanding variation. What many of them don't understand is that as a quality professional in an industrial setting, our goal is NOT to understand the theoretical implications of variation. Top management wants their problem FIXED! Mr. Bhote clearly understands this and offers Dorian's techniques as a way to achieve this. He elucidates clearly on the advantages of "talking to the parts" to gain an understanding of exactly how they vary, and then using that understanding to leverage differences between parts found at the extremees of the distribution to understand WHY they are the way they are. If you want to learn how to use simple and effective techniques to solve those problems that everyone says can't be solved, this is the book for you. Highly recommended.
Rating: Summary: use with care Review: Bothe's tools can be useful when something already went wrong and you need a quick fix. So multivari, paired comparision, component search should be in your toolbox of problem solving.Why do things go wrong? Because the products or their associated processes are not designed well enough. If they had, how could a problem occur? They are too sensitive to variability, which engineers can not control (like different users, wear and aging etc.: noise). A careful look at Bothe's case studies show: parameters studied and finally changed are often - noise factors. There is a problem with this. The leakage of a capacitor was identified in the Microcomputer case study (delay time). The supplier of this device was contacted and "(...) leakage was reduced at no extra cost for the company (...)". That is good. But what happens, when something changes at the supplier? When policy changes? Or raw materials are changed to reduce cost? Or moral changes among its employees? Etc. All of a sudden the delay-time problem can pop up again. So, what is the achievement? There is an other option: make the microcomputer less sensitive against leakage. Even, if the underlying root cause should change over time (degree of leakage), it can not cause harm. From a quality point of view you should never be forced to search for trouble-makers. If so, it is already too late. A "Red X" like "no coolant in the machine" should never happen. How could it ever happen? It is a finger-print of insufficient design. In such a situation it is very easy to achieve a 10:1 or 50:1 improvement: the situation allowed already a worsening of 1:10 or 1:50 ... while it should have been stable. In my view, time pressure, lack of required specific knowledge, lack of phantasy to figure out available disaster and similar lead to insufficient design (think of accidents). This is a serious problem in product and process design. This is why I prefer Taguchi's approach of making products insensitive against noise in the research and design phase: find that combination of design parameters, which will minimize the impact of noise factors (usage, aging, information etc.) during its lifetime. No sensitivity, no complaints. Bothe may be right: if you use the Taguchi approach while lacking specific knowledge on the product, its technology, its later usage etc. you will have a problem. Garbage in, garbage out. So, how to support engineers in finding the required specific knowledge? How to sharpen their thinking in a short period of time? There are many ways to do it. E.g. you can start at the symptom and derive clues by Bothe. This will deepen your understanding of the underlying processes. You can use these findings to find relevant noise factors quickly. How to become robust against these noises without controlling them? You could vary design paramters and subject each design variant to the identified (strong) noises. Evaluate the functionality of your product and select the least sensitive one. Oops, this is almost the Taguchi approach. Does the final result match your expectations? If so, why? If not, what is wrong in your perception of this specific technology? The product now is less sensitive, isn't it? Why? In my view we need knowledge creating tools, not counters ;-) to create excellent designs at low total cost, fast....
Rating: Summary: Good book - but foul attitude... Review: Excellent material, marred by an attitude towards other quality gurus. The author does a good job of presenting sound and fast methodologies in product quality. These techniques can be of value to every professional engaged in manufacturing and quality fields. A must read, but ignore the pungent remarks on other methods. Taguchi techniques also work well, I have used them often.
Rating: Summary: Good book - but foul attitude... Review: Excellent material, marred by an attitude towards other quality gurus. The author does a good job of presenting sound and fast methodologies in product quality. These techniques can be of value to every professional engaged in manufacturing and quality fields. A must read, but ignore the pungent remarks on other methods. Taguchi techniques also work well, I have used them often.
Rating: Summary: Finding the Root Cause Review: First, let's get the negative stuff out of the way. The first 1/4 of the book contains a lot of comparisons between the author's methods and everyone else's. Not surprisingly, his consistently rates highest. Included are tables with numerical ratings of the different experimental design strategies but no explanation is given for where the numbers come from. Skip it. The meat of the book is its exposition of Dorian Shainin's DOE methodology. I am not claiming to have made an exhaustive survey of the literature on this subject, but he is the only one I have read to offer a workable strategy for sorting through a large number of variables in order to arrive at those that truly control the response of interest without the confounding of main and interaction effects that results from the use of fractional factorials, Taguchi orthogonal arrays and other methods. I have just four more words on this book: try it, it works.
Rating: Summary: not too too bad Review: I guess i liked the book because the technical writing was nice and easy to understand. I really haven't read this book, but i would like to know who this other ben cromwell is... especially since he lives in Gilbert. I live in scottsdale, and i'm intrigued that there is another ben cromwell in the world and so close to me. What's your middle name by the way? anyway, i just wanted to get that off my chest.
Rating: Summary: not too too bad Review: I guess i liked the book because the technical writing was nice and easy to understand. I really haven't read this book, but i would like to know who this other ben cromwell is... especially since he lives in Gilbert. I live in scottsdale, and i'm intrigued that there is another ben cromwell in the world and so close to me. What's your middle name by the way? anyway, i just wanted to get that off my chest.
Rating: Summary: Fantastic Summary of Shainin's Powerful Techniques! Review: I have used Dorian Shainin's statistical engineering techniques for years and have solved several tough problems in manufacturing environments. I have found the techniques to be quite capable of helping me solve probably 99% of the problems I have faced in manufacturing. Bhote's second edition is a welcome update from his sparse first attempt. This book shows techniques, examples and how they work and don't work. More and newer tools are shown in this edition also. I found it a little difficult to read over and over again Keki's slamming of Taguchi and classical DOE. Shainin has used these tools to develop his own tools, and while they aren't used in his strategies by name they should at least be given polite acknowlegement by the author. I often felt as if Keki was begging the reader to use Shainin's techniques instead of simply writing about them. Overall I appreciate the compilation of almost all of Shainin's techniques even though so many have service marks on them for protection. This is a wonderful reference book and I have found it very useful to use when I explain the tools to others. I did have a hard time trying to merge the message of six sigma with Shainin's statistical engineering. I couldn't figure out if Keki thought six sigma was right or wrong, but he then went on to promote his own new version of everything, the Big Q. A little too much selling.
Rating: Summary: Practical Review: I'm not an academic in statistics and DoE but an end user to this advanced quality tools so I don't really care that much about the academic part of the theory so long as the methods help me in my work. What I find most interesting of Shainin's method is its practicality and ease of use. Keki has indeed done a great job in explaining the methods from his own industrial experiences without flooding the reader with too much theory. He used real life industrial application examples to illustrate his points which is something very useful to the practitioner like me. Although there're some typo errors in this book and could be frustrating but it makes you really read and understand the principle behind each method more carefully and that's good. After reading this book, I find an urge to share this new practical knowledge with my collegues because it is simply easy to use and yet powerful.
By reading this book and practising it in your work, it will becomes an assest to you. I'm not denying the contribution of the traditional DoE and Taguchi method because I felt that all methods are good as long as it is easy to use and at the end of the day help us to solve the problem.
Rating: Summary: two messages that are blurred Review: In principle the book is ok and reads very smoothly. The techniques are all right to in many situations In my view the problem is that Keki Bhote compairs things like Taguchi methods and SPC the wrong way, more politically than technically Each tool has it's value in specific situations. This counts for DOE (find the red-X) as well for SPC (process in control or not ?) as well for Taguchi methods (where is the optimum ?) Paying respects to the various inventors of tools and techniques in stead of trying to tear things down by a few examples should make the book more mature in my opinion Ir. R. Onderdelinden O'linden Industrial Support BV
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