Practical Manual of Quality Function Deployment
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Practical Manual of Quality Function Deployment - Davide Maritan
Davide Maritan
Practical Manual of Quality Function Deployment
A327538_1_En_BookFrontmatter_Figa_HTML.gifDavide Maritan
Soave, Verona, Italy
ISBN 978-3-319-08520-3e-ISBN 978-3-319-08521-0
DOI 10.1007/978-3-319-08521-0
Springer Cham Heidelberg New York Dordrecht London
Library of Congress Control Number: 2014948074
© Springer International Publishing Switzerland 2015
This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. Exempted from this legal reservation are brief excerpts in connection with reviews or scholarly analysis or material supplied specifically for the purpose of being entered and executed on a computer system, for exclusive use by the purchaser of the work. Duplication of this publication or parts thereof is permitted only under the provisions of the Copyright Law of the Publisher’s location, in its current version, and permission for use must always be obtained from Springer. Permissions for use may be obtained through RightsLink at the Copyright Clearance Center. Violations are liable to prosecution under the respective Copyright Law.
The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use.
While the advice and information in this book are believed to be true and accurate at the date of publication, neither the authors nor the editors nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
Printed on acid-free paper
Springer is part of Springer Science+Business Media (www.springer.com)
To Monica,
Sebastiano and Anna,
my life
Foreword
The importance of new product development (NPD) for a company’s growth and prosperity is widely recognized. Faced with an increasingly volatile external environment characterized by shorter product life cycles, heightened local and global competition, maturing industries and flat markets, and a quickening pace of technological developments, many companies are in a position where NPD is no longer a strategic option but has become a strategic necessity.
According to managers and researchers, the benefit resulting from improving the early phases of New Product Development which typically precede the detailed design and development of a new product are likely to far exceed those that result from improvements aimed directly at the engineering design process.
Several critical success factors for these first stages of NPD have been identified in the literature. Detailed customer needs analysis is one of these critical factors. Capturing customer needs is crucial when producing high quality products. Quality Function Deployment (QFD) is a method for getting in touch with the customer and for using this knowledge to develop products which satisfy the customer.
Quality Function Deployment (QFD) was conceived in Japan in the late 1960s, during an era when Japanese industries broke away from their post-World War II mode of product development through imitation and copying and moved to product development based on originality. QFD came into being in this environment as a method or concept for new product development under the umbrella of Total Quality Control.
Today, QFD application goes beyond product and service design, although those activities comprise most applications of QFD. QFD has been extended to apply to any planning process where a team has decided to systematically prioritize possible responses to a given set of objectives.
I first came across QFD as a methodology in the mid-1990s. At that time, I had over 10 years’ engineering experience and was a university professor of Industrial Marketing. The matrix approach which characterizes QFD seemed like a great way to keep track of the multitude of requirements and relationships that drive design decisions during the course of product development. I think that QFD is a powerful tool for delivering a valuable product to customers and leading to significant improvements in product/process performances. It is a team-based system which means that team members work closely enough with one another to provide accurate and useful appraisal information. This implies that not only the voice of the customer but also the voice of all firm’s different departments are taken into consideration.
The book provides a clear description of a comprehensive quality function deployment framework. The reader is guided on how to create the matrices through practical examples. Discussions are also provided on how to gather information on customer needs and how such information could be used in product or service design and helping a firm gain ground compared to its competitors.
These issues are addressed by the author in a systematic way and with a distinctly analytical approach, but always using accurate and understandable language.
The presentation is also accompanied by a considerable amount of explanatory examples, taken directly from experience gained in the field.
In this sense, the book is an example of a perfect blend of technical expertise and professional experience. Consultants, practitioners, engineers, and students will find this book a useful reference manual and a good introduction to quality management and to quality function deployment in general.
Roberto Panizzolo
Padova, Italy
July 2014
Acknowledgments
I am particularly grateful to Springer and to Maria Cristina Acocella, Assistant Editor at Springer, for all her assistance and also as she was the first to have faith in this project. Her courtesy, willingness, and precision have been a great help to me. My grateful thanks also go to the team of professionals and colleagues who helped me in the last months of work on the book: to Mary Campbell, our meetings played an important role in revising the text; to Paola Scagnellato, my mother, whose great ability for language and reference research I have only recently discovered; to Mariangela Crotone, who dedicated a lot of her working time to keeping my progress up to schedule; and to Christiane Roethe, who helped me on one case study. Special thanks should also be given to Alessandro Trevisan, web survey specialist and ground source heat pump expert, for his steadfast support during these months. My thanks go to Danilo Tommasi who helped me develop the fastest QFD project ever. I would also like to extend my thanks to Roberto Panizzolo, with whom I shared several research and consultancy projects. I wish to thank all the students I taught and worked with, now professionals and engineers, for their contribution to QFD research and creativity.
Contents
1 Quality Function Deployment (QFD): Definitions, History and Models 1
1.1 Introduction 2
1.2 What You Will Learn in This Chapter 3
1.3 The New Product Development (NPD) Process 4
1.3.1 Products and Services 5
1.3.2 Definition of the NPD Process 6
1.3.3 Critical Variables in the NPD Process 7
1.4 Quality Function Deployment Definitions 11
1.5 QFD History 12
1.6 Four Phase and Comprehensive Models 15
1.6.1 Four Phase Model 16
1.6.2 Comprehensive Model 19
1.7 Strengths and Weaknesses of Quality Function Deployment 19
1.7.1 Strengths 20
1.7.2 Weaknesses 21
1.8 Creativity and QFD 23
1.9 The Proposed Framework 27
References 29
2 Strategic Matrices and Customer Analysis 33
2.1 Introduction 34
2.2 What You Will Learn in This Chapter 34
2.3 The Royal Classic Bicycle Case Study 37
2.4 Strategy Deployment 39
2.4.1 Matrix 1. Strategic Targets Priority and AHP Method 41
2.4.2 Matrix 2. Core Competency Priority and the Independent Scoring Method 45
2.4.3 Matrix 3. Customer Segment Priority 48
2.5 Customer Analysis. From Gemba
to the Demanded Qualities (DQ) 50
2.5.1 Gemba Analysis 51
2.5.2 How Is a Gemba Interview Carried Out 55
2.5.3 Voice of the Customer Table 56
2.5.4 Jiro Kawakita KJ Method and the Demanded Quality Deployment Chart (DQDC) 58
2.6 Customer Analysis. Questionnaire Design and the Preplan Matrix 65
2.6.1 The Questionnaire 66
2.6.2 Preplan Matrix and Demanded Quality Weight 72
2.7 Appendix. Royal Voice of the Customer Table (VOCT) 77
References 82
3 QFD from Product Characteristics to Pre-production 83
3.1 Introduction 84
3.2 What You Will Learn in This Chapter 84
3.3 Quality Characteristics and the House of Quality 87
3.3.1 Characteristics Deployment 87
3.3.2 Request—Characteristic Matrix 5 (House of Quality—HoQ) 90
3.4 Functions and Product Mechanisms 94
3.4.1 Function Deployment 94
3.4.2 Mechanisms Deployment 100
3.5 Innovation 102
3.6 Parts Deployment, Costs and Process Deployment 105
3.6.1 The Parts of the Product 105
3.6.2 The Costs of the Parts 109
3.6.3 Process Phase Priority 111
3.7 Reliability 113
3.8 Summary 116
References 117
4 Fuzzy QFD 119
4.1 Introduction 119
4.2 What You Will Learn in This Chapter 120
4.3 Fuzzy Sets and Fuzzy Mathematics 121
4.3.1 Fuzzy Sets 122
4.3.2 Fuzzy Numbers 125
4.4 Fuzzy QFD 127
4.4.1 Fuzzy Questionnaire 127
4.4.2 Fuzzy Preplan 129
4.4.3 QFD Matrices and House of Quality 140
References 141
5 QFD Case Histories 143
5.1 Introduction 143
5.2 Company 1. Geotherm. A Longitudinal Case Study 144
5.2.1 Market and Strategy Analysis 146
5.2.2 Gemba and Preplan 150
5.2.3 House of Quality and Bottlenecks 154
5.2.4 What We Learned 156
5.3 Company 2. Wepartner. Territorial Marketing with Fuzzy QFD 156
5.3.1 Fuzzy Strategic Matrices 157
5.3.2 Gemba Analysis and Fuzzy Preplan 158
5.3.3 Fuzzy House of Quality 161
5.3.4 QFD Organisational Analysis 163
5.3.5 What We Learned 165
5.4 Company 3. Citymove. Planning Services for Public Transport 166
5.4.1 Strategic Matrices 166
5.4.2 Gemba and Preplan 168
5.4.3 House of Quality and Bottlenecks 173
5.4.4 What We Learned 176
5.5 Company 4. Elight. Product Line Planning 177
5.5.1 Phase 1. Strategy 179
5.5.2 Phase 2. Gemba and Questionnaire Survey 180
5.5.3 Phase 3. Preplan 182
5.5.4 Phase 4. House of Quality and Bottleneck Analysis 182
5.5.5 Project Lead Time and Relationship Effects 183
5.5.6 What We Learned 185
5.6 Review of Four Other QFD Projects 185
5.6.1 Case 5. Paint 185
5.6.2 Case 6. Insure 186
5.6.3 Case 7. Mobile 1 187
5.6.4 Case 8. Stone 188
References 190
© Springer International Publishing Switzerland 2015
Davide MaritanPractical Manual of Quality Function Deployment10.1007/978-3-319-08521-0_1
1. Quality Function Deployment (QFD): Definitions, History and Models
Davide Maritan¹
(1)
Soave, VR, Italy
Davide Maritan
Email: maritand@qfd.it
Abstract
In this chapter the basic concepts of Quality Function Deployment are presented together with the context in which the method can be applied. In more detail, following a 5Ws 1H scheme, Where, What, Who, When, Why, How (5W1H), there are some basic questions to be answered:
Where can QFD be applied?
What is QFD? Who is involved?
When was QFD invented? What is QFD history?
How is it built? Are there any reference models?
What are the strengths and weaknesses of Quality Function Deployment in today’s research? Can QFD help creative, new product development?
What is the QFD framework suggested in this book?
What you will learn in this chapter is primarily the initial context in which this method appears, the New Product Development (NPD) Process, some key definitions, the historical bases and two reference models known as four phase
and comprehensive
models. A summary of the main strengths and weaknesses of QFD is then presented. A section is dedicated to the capacity that QFD can have in supporting the development of creative
products and services. And at the end there is a proposal for a practical framework with a good capacity to cover the different phases of the product development process and sufficiently easy to implement, even when there are limited resources to be allocated, and/or a short development time.
1.1 Introduction
Understanding other people is a fundamental human need, answered by social interaction between human beings who, for this reason, in addition to body language, have developed the useful tools of speech and the written word over the centuries. The problem however is that languages differ both from each other and from country to country and the complexity of meaning varies according to a host of variables. It is therefore very difficult to fully understand the message that another person, from a different cultural background, wishes to convey. It is hard enough for each one of us to be fully aware of our own feelings or our deepest emotions.
On a daily basis we all find that conflict emerges from misunderstandings or the lack of communication between different groups of people, such as within a family or wider social groups, (e.g. between companies, customers, suppliers or between fans of different teams), each with their own cultural, linguistic or religious identities (think of the fear generated between cultures that do not know each other well), or between states (remember the two terrible World Wars last century).
Even if actually solving this problem is clearly impossible, there are however several ways to reduce it to levels deemed acceptable:
Limit social interaction;
Maintain relations only within a homogeneous group;
Develop a common language;
Activate mechanisms to allow for better understanding between the interlocutor and ourselves;
Enable diplomatic strategies whereby there are no losers.
The first two points are simplistic and not applicable in the global village in which we live today, without becoming isolated. The others are currently used to create many effective relationships not only between different people, but also between people and the objects or services they make use of.
In his book ‘Emotional Design’, Norman (2004) explains that the principles required for the design of pleasant and effective interaction between human beings and products are exactly the same as those that underlie pleasant and effective interaction between individuals. In other words, the problems related to communication between people are also found in the relationship between people and products, as conceived, designed and produced by individuals, different to ourselves.
In the development of a new product there are methodological solutions, which allow for a better understanding of customer requirements and subsequently sound management of the technical specifications, quality, costs and engineering aspects. The theme is to simplify, make the information flow between different contexts that are often not homogeneous, both clear and understandable, i.e. between the customer and the supplier of the product. Here, the Japanese methodology Quality Function Deployment (QFD) comes into play.
This book is divided into five Chapters.
In this chapter we will discover the basic concepts of Quality Function Deployment (definitions, history) and the context in which the method can be applied (new product development process, strengths and weaknesses of QFD). One section is dedicated to the capacity that QFD has for supporting the development of creative
products and services. At then end of this chapter there is a practical comprehensive QFD model.
In Chap. 2 the first two phases of the QFD framework will be discussed: Strategy (three matrices for targets, core competencies and customer segments) and Customer (gemba interviews, questionnaire survey, Preplan matrix).
In Chap. 3 the rest of the QFD framework phases will be discussed: Product characteristics, Functions and Mechanisms, Innovation, Parts, Costs and Production process, Reliability.
Chapter 4 deals with a simplified approach to fuzzy mathematics applied to QFD. The aim is to give the reader some basic tools to be used if the team wants to manage fuzziness in QFD projects.
Reading Quality Function Deployment case studies can be useful for understanding how professionals applied QFD and what the specific findings were. In Chap. 5 eight real QFD projects are presented, four in detail and four others briefly. Each case has its own peculiarities that will be discussed.
1.2 What You Will Learn in This Chapter
In this chapter I will present the basic concepts of Quality Function Deployment and the context in which the method can be applied. In more detail, following a Five Ws scheme, Where, What, Who, When, Why, How (5W1H), there are some basic questions to be answered:
Where can QFD be applied?
What is QFD? Who is involved?
When was QFD invented? What is QFD history?
How is it built? Are there any reference models?
What are the strengths and weaknesses of Quality Function Deployment in today’s research? Can QFD help creative, new product development?
What is the QFD framework suggested in this book?
What you will learn in this chapter (Fig. 1.1) is primarily the initial context in which this method appears, the New Product Development (NPD) Process, some key definitions, the historical bases and two reference models known as four phase
and comprehensive
models. A summary of the main strengths and weaknesses of QFD is then presented.
Fig. 1.1
Workflow of this chapter, QFD in NPD process, definitions and history, models, strengths and weaknesses, creativity and QFD, the framework described in this book
A section is dedicated to the capacity that QFD can have in supporting the development of creative
products and services. And at the end there is a proposal for a practical framework with a good capacity to cover the different phases of the product development process and sufficiently easy to implement even when there are limited resources to be allocated, and/or a short development time.
Some Sub-chapters can be difficult to read because of the reference citations.
1.3 The New Product Development (NPD) Process
In the context of specific skills that are perceived as crucial today and in the future, a key role is performed by the ability to develop products and services at an ever increasing speed, higher quality at a reasonable cost and, ever more important, paying close attention to environmental and ethical issues. These latter, together with Responsible Business Practice (RBP) and Corporate Social Responsibility (CSR), play an increasingly significant role in public discourse on the governance of globalization, in particular as the transnational organization of production has accelerated over the last decades (Fransen 2013). The spread of Internet and the speed of information transmission, along with citizens’ pressure group tools, such as the petition platforms change.org and avaaz.org, mean that companies (and people, managers, employees), the brand, and the