Software Development Pearls

Software Development Pearls book cover

Software Development Pearls

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Foreword xix
Acknowledgments xxi
About the Author xxiii

Chapter 1: Learning from Painful Experience 1
My Perspective 1
About the Book 2
A Note on Terminology 4
Your Opportunity 5

Chapter 2: Lessons About Requirements 7
Introduction to Requirements 7
First Steps: Requirements 11
Lesson 1: Get the requirements right or the project will fail 12
Lesson 2: Requirements development delivers shared understanding 15
Lesson 3: Stakeholder interests intersect at the requirements 17
Lesson 4: Favor a usage-centric approach to requirements 21
Lesson 5: Requirements development demands iteration 25
Lesson 6: Agile requirements aren’t different from other requirements 28
Lesson 7: Recording knowledge is cheaper than acquiring it 33
Lesson 8: Requirements are about clear communication 37
Lesson 9: Requirements quality is in the eye of the beholder 41
Lesson 10: Requirements must be good enough to reduce risk 44
Lesson 11: People don’t simply gather requirements 46
Lesson 12: Elicitation brings the customer’s voice to the developer 51
Lesson 13: Telepathy and clairvoyance don’t work 55
Lesson 14: Large groups have difficulty agreeing on requirements 57
Lesson 15: Avoid decibel prioritization 61
Lesson 16: Define scope to know whether your scope is creeping 64
Next Steps: Requirements 69

Chapter 3: Lessons About Design 71
Introduction to Design 71
First Steps: Design 75
Lesson 17: Design demands iteration 76
Lesson 18: It’s cheaper to iterate at higher levels of abstraction 79
Lesson 19: Make products easy to use correctly, hard to use incorrectly 84
Lesson 20: You can’t optimize all desirable quality attributes 87
Lesson 21: An ounce of design is worth a pound of recoding 92
Lesson 22: Many system problems take place at interfaces 94
Next Steps: Design 100

Chapter 4: Lessons About Project Management 103
Introduction to Project Management 103
First Steps: Project Management 108
Lesson 23: Work plans must account for friction 109
Lesson 24: Don’t give anyone an estimate off the top of your head 114
Lesson 25: Icebergs are always larger than they first appear 116
Lesson 26: Data strengthens your negotiating position 121
Lesson 27: Use historical data to improve estimates 124
Lesson 28: Don’t change an estimate just to make someone happy 127
Lesson 29: Stay off the critical path 129
Lesson 30: Incomplete tasks get no partial credit 132
Lesson 31: A project team needs flexibility to adapt to change 136
Lesson 32: Uncontrolled project risks will control you 140
Lesson 33: The customer is not always right 145
Lesson 34: We do too much pretending in software 149
Next Steps: Project Management 151

Chapter 5: Lessons About Culture and Teamwork 153
Introduction to Culture and Teamwork 153
First Steps: Culture and Teamwork 158
Lesson 35: Knowledge is not zero-sum 159
Lesson 36: Don’t make commitments you know you can’t fulfill 163
Lesson 37: Higher productivity requires training and better practices 166
Lesson 38: The flip side of every right is a responsibility 171
Lesson 39: Surprisingly little separation can inhibit communication 173
Lesson 40: Small-team approaches don’t scale to large projects 177
Lesson 41: Address culture change during a change initiative 180
Lesson 42: Engineering techniques don’t work with unreasonable people 185
Next Steps: Culture and Teamwork 187

Chapter 6: Lessons About Quality 189
Introduction to Quality 189
First Steps: Quality 194
Lesson 43: Pay for quality now or pay more later 195
Lesson 44: High quality naturally leads to higher productivity 200
Lesson 45: Organizations somehow find time to fix bad software 205
Lesson 46: Beware the crap gap 207
Lesson 47: Never let anyone talk you into doing a bad job 209
Lesson 48: Strive to have peers find defects 213
Lesson 49: A fool with a tool is an amplified fool 217
Lesson 50: Rushed development leads to maintenance nightmares 221
Next Steps: Quality 224

Chapter 7: Lessons About Process Improvement 225
Introduction to Process Improvement 225
First Steps: Software Process Improvement 228
Lesson 51: Watch out for “Management by Businessweek” 229
Lesson 52: Ask not, “What’s in it for me?” Ask, “What’s in it for us?” 233
Lesson 53: The best motivation for changing how people work is pain 236
Lesson 54: Steer change with gentle pressure, relentlessly applied 238
Lesson 55: Don’t make all the mistakes other people already have 241
Lesson 56: Good judgment and experience can trump a process 244
Lesson 57: Shrink templates to fit your project 247
Lesson 58: Learn and improve so the next project goes better 252
Lesson 59: Don’t do ineffective things repeatedly 256
Next Steps: Software Process Improvement 259

Chapter 8: What to Do Next 261
Lesson 60: You can’t change everything at once 262
Action Planning 266
Your Own Lessons 267

Appendix: Summary of Lessons 269

References 273
Index 285
Karl Wiegers is Principal Consultant with Process Impact, a software development consulting and training company in Happy Valley, Oregon. Previously, he spent eighteen years at Kodak, where he held positions as a photographic research scientist, software developer, software manager, and software process and quality improvement leader. Karl received a PhD in organic chemistry from the University of Illinois. Karl is the author of twelve previous books and has written many articles on software development, management, design, consulting, chemistry, and military history. Karl has served on the editorial board for IEEE Software magazine and as a contributing editor for Software Development magazine.Accelerate Your Pursuit of Software Excellence by Learning from Others’ Hard-Won Experience

“Karl is one of the most thoughtful software people I know. He has reflected deeply on the software development irritants he has encountered over his career, and this book contains 60 of his most valuable responses.”
— From the Foreword by  Steve McConnell, Construx Software and author of  Code Complete

“Wouldn’t it be great to gain a lifetime’s experience without having to pay for the inevitable errors of your own experience? Karl Wiegers is well versed in the best techniques of business analysis, software engineering, and project management. You’ll gain concise but important insights into how to recover from setbacks as well as how to avoid them in the first place.”
–Meilir Page-Jones, Senior Business Analyst, Wayland Systems Inc.

Experience is a powerful teacher, but it’s also slow and painful. You can’t afford to make every mistake yourself! Software Development Pearls helps you improve faster and bypass much of the pain by learning from others who already climbed the learning curves. Drawing on 25+ years helping software teams succeed, Karl Wiegers has crystallized 60 concise, practical lessons for all your projects, regardless of your role, industry, technology, or methodology.

Wiegers’s insights and specific recommendations cover six crucial elements of success: requirements, design, project management, culture and teamwork, quality, and process improvement. For each, Wiegers offers First Steps for reflecting on your own experiences before you start; detailed Lessons with core insights, real case studies, and actionable solutions; and Next Steps for planning adoption in your project, team, or organization. This is knowledge you weren’t taught in college or boot camp. It can boost your performance as a developer, business analyst, quality professional, or manager.

  • Clarify requirements to gain a shared vision and understanding of your real problem
  • Create robust designs that implement the right functionality and quality attributes and can evolve
  • Anticipate and avoid ubiquitous project management pitfalls
  • Grow a culture in which behaviors actually align with what people claim to value
  • Plan realistically for quality and build it in from the outset
  • Use process improvement to achieve desired business results, not as an end in itself
  • Choose your next steps to get full value from all these lessons

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Accelerate your pursuit of software development excellence with insightful “pearls of wisdom” based on immense practical experience 
  • Succinct statements of experience-based wisdom—for virtually all software projects, in all domains, with any technology or platform infrastructure 
  • Covers crucial domains of project success: requirements, design, project management, culture and teamwork, quality, and process improvement 
  • By Karl Wiegers, internationally renowned software process improvement expert, author, and presenter 

“This is a collection of lessons that Karl Wiegers has learned over his long and, I can say this honestly, distinguished career. It is a retrospective of all the good things (and some of the bad) he picked up along the way. However, this is not a recollection of ‘It was like this in my day’ aphorisms, but lessons that are relevant and will benefit anybody involved, even tangentially, in software development today. The book is surprising. It is not simply a list of pearls of wisdom–each lesson is carefully argued and explained. Each one carries an explanation of why it is important to you, and importantly, how you might bring the lesson to your reality.”
James Robertson, author of Mastering the Requirements Process

“They say experience is the best teacher. But experience is fraught with danger, because you’ll make many expensive mistakes along its path. And experience is also a slow teacher. Experience’s final lessons come just before you graduate–into retirement!

“Wouldn’t it be great to gain a lifetime’s experience early in your career, when it’s most useful, without having to pay for the inevitable errors of your own experience? Much of Karl Wiegers’s half-century in software and management has been as a consultant, where he’s often been called upon to rectify debacles of other people’s making. In Software Development Pearls, Karl lays out the most common and egregious types of maladies that he’s run into. It’s valuable to know where the most expensive potholes are and which potholes people keep hitting time and time again.

“Not just a disaster correspondent, Karl is well versed in the best techniques of business analysis, software engineering, and project management. So from Karl’s experience and knowledge you’ll gain concise but important insights into how to recover from setbacks as well as how to avoid them in the first place.

“Forty-six years ago I was lucky enough to stumble onto Fred Brooks’s classic The Mythical Man-Month, which gave me tremendous insights into my new career. Karl’s book is in a similar vein, but broader in scope and more relevant for today’s world. My own half-century of experience confirms that he’s right on the money with the lessons that he’s chosen for Software Development Pearls.”
Meilir Page-Jones, Senior Business Analyst, Wayland Systems Inc.

“Karl Wiegers has done it again! He’s created yet another wonderful book full of well-rounded advice for software developers. His wisdom will be relatable to all development professionals and students–young and old, new and experienced. Although I’ve been doing software development for many years, this book brought timely reminders of things my team should do better. I cannot wait to have our new-to-the-job team members read this, so they can be better equipped in their learning journey.

Software Development Pearls is rooted in actual experiences from many years of real projects, with a dose of thorough research to back up the lessons. Many software development books are so dry to read, but as with all of Karl’s books, he keeps it light and engaging, chock-full of relatable stories and a few funny comments. You can read it from front to back or just dive into a particular section that’s relevant to the areas you’re looking to improve today. An enjoyable read plus practical advice–you can’t go wrong!”
Joy Beatty, Vice President at Seilevel

“Karl Wiegers’s Software Development Pearls achieves the challenging goal of capturing and explaining many insights that you’re unlikely to be exposed to in your training, that most practitioners learn through the school of hard knocks, and yet are critical to developing great software.

“While the book’s structure compels you to connect with your experience and identify how to shift your behavior as a result, it’s the content that shines: a collection of 59+1 lessons that cover the broad landscape of the software development ecosystem. These insights will help you save time, collaborate more effectively, build better systems, and change your view on common misconceptions. Software Development Pearls is an easy read and is backed by a wide range of references to other experts who have discovered these same insights in their travels.

“These lessons truly are pearls: timelessly valuable elements of wisdom to make you better at developing great software, regardless of your role. You might consider getting two copies of the book: one for yourself, and one to leave where others on the team can pick it up and discover their own pearls.”
Jim Brosseau, Clarrus

“This is an excellent book for anyone involved in software development, whether they’re business analysts, software project managers or QA professionals. One of the brilliant (and unusual) aspects of the book is the way it is organized into self-contained lessons. Once you read them, they work like memes–memorable chunks of distilled knowledge that spring to mind when you need them. (This happened to me recently when I was discussing the need for a requirements competency on agile projects with a senior executive and immediately thought of Lesson #8, ‘The overarching objective of requirements development is clear and effective communication.’) From personal experience, I can attest to the value of lessons like #22, ‘Many system problems take place at the interfaces,’ but only because I was burned badly by not paying enough attention to them. Anyone in software development eventually accumulates hard-won lessons like these about what to do (and not do) in the future. This book will get you there with much less pain. As Karl Wiegers says in Lesson #7, ‘The cost of recording knowledge is small compared to the cost of acquiring knowledge.’ Not only is that good advice for practitioners, it also neatly captures why you should buy this book.”
Howard Podeswa, author of The Agile Guide to Business Analysis and Planning: From Strategic Plan to Continuous Value Delivery

  • Succinct statements of experience-based wisdom—for virtually all software projects, in all domains, with any technology or platform infrastructure
  • Covers crucial domains of project success: requirements, design, project management, culture and teamwork, quality, and process improvement
  • By Karl Wiegers, internationally renowned software process improvement expert, author, and presenter

Drawing on 20+ years helping software teams succeed in nearly 150 organizations, Karl Wiegers presents 60 concise lessons and practical recommendations students can apply to all kinds of projects, regardless of application domain, technology, development lifecycle, or platform infrastructure.

Embodying both wisdom for deeper understanding and guidance for practical use, this book represent an invaluable complement to the technical “nuts and bolts” software developers usually study.

Software Development Pearls covers multiple crucial domains of project success: requirements, design, project management, culture and teamwork, quality, and process improvement. Each chapter suggests several “first steps” and “next steps” to help you begin immediately applying the author’s hard-won lessons—and writing code that is more successful in every way that matters.

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Dimensions 0.95 × 6.95 × 9.05 in
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professional, higher education, COM051230, Employability, IT Professional, Y-AB SOFTWARE METHODS, COM051240, COM051330