Testing Computer Software / Edition 2

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This book will teach you how to test computer software under real-world conditions. The authors have all been test managers and software development managers at well-known Silicon Valley software companies. Successful consumer software companies have learned how to produce high-quality products under tight time and budget constraints. The book explains the testing side of that success.

Who this book is for:
* Testers and Test Managers
* Project Managers-Understand the timeline, depth of investigation, and quality of communication to hold testers accountable for.
* Programmers-Gain insight into the sources of errors in your code, understand what tests your work will have to pass, and why testers do the things they do.
* Students-Train for an entry-level position in software development.

What you will learn:
* How to find important bugs quickly
* How to describe software errors clearly
* How to create a testing plan with a minimum of paperwork
* How to design and use a bug-tracking system
* Where testing fits in the product development process
* How to test products that will be translated into other languages
* How to test for compatibility with devices, such as printers
* What laws apply to software quality

"...includes tips on how to create a testing plan & a bug tracking system, how to test for compatibility with other devices, where testing fits best in the product development process, and what laws apply to software quality."

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Editorial Reviews

From the Publisher
"I enjoyed reading Testing computer software. The text contains numerous highlights Offering practical advice, authoritative figures you can cite to customers and higher management, and entertaining anecdotes to share with coworkers Although some sections need updating, I still think it is a valuable training and reference source for software testers, managers, and developers." —Diomidis Spinellis; IEEE software magazine (May /June 2001))

"Deep insight and a great deal of experience is contained in this book" (Database & Network Journal, Vol 30/5 2000)

I enjoyed reading Testing computer software. The text contains numerous highlights Offering practical advice, authoritative figures you can cite to customers and higher management, and entertaining anecdotes to share with coworkers Although some sections need updating, I still think it is a valuable training and reference source for software testers, managers, and developers.
Database & Network Journal
Deep insight and a great deal of experience is contained in this book.2000
Covers some 400 types of software errors and how to cope with last minute changes; detect design errors in the user interface; set priority strategies; estimate, plan, and schedule tests; manage test groups--hiring, avoiding traps, dealing with outside testing companies. Annotation c. Book News, Inc., Portland, OR (booknews.com)
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Product Details

  • ISBN-13: 9780471358466
  • Publisher: Wiley
  • Publication date: 4/28/1999
  • Edition description: REV
  • Edition number: 2
  • Pages: 496
  • Sales rank: 598,309
  • Product dimensions: 7.22 (w) x 9.20 (h) x 1.09 (d)

Meet the Author

CEM KANER consults on technical and software development management issues and teaches about software testing at local universities and at several software companies. He also practices law, usually representing individual developers, small development services companies, and customers. He founded and hosts the Los Altos Workshops on Software Testing. Kaner is the senior author of Bad Software: What to Do When Software Fails (Wiley).

JACK FALK consults on software quality management and software engineering management. Jack is certified in Software Quality Engineering by the American Society of Quality. He is Vice Chair of the Santa Clara Valley Software Quality Association and an active participant in the Los Altos Workshops on Software Testing.

HUNG Q. NGUYEN is Founder, President, and CEO of softGear technology. He has worked in the computer software and hardware industries, holding management positions in engineering, quality assurance, testing, product development, and information technology, as well as making significant contributions as a tester and programmer. He is an ASQ-Certified Quality Engineer, and a senior member and San Francisco Section Certification Chairman of the American Society for Quality.

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Read an Excerpt



In Chapter 5, we described how a bug is reported. Here we describe what happens to the Problem Reportafter you report it. This chapter provides the basic design of a problem tracking database and puts it inperspective. It describes the system in terms of the flow of information (bug reports) through it and the needs ofthe people who use it. We provide sample forms and reports to illustrate one possible implementation of thesystem. You could build many other, different, systems that would support the functional goals we lay out forthe database.


Up to now, the "you" - that we've written to has been a novice tester. This chapter marks a shift in position. Fromthis point onward, we're writing to a tester who's ready to lead her own project. We write to you here assumingthat you are a project's test team leader, and that you have a significant say in the design of the tracking system.If you aren't there yet, read on anyway. This chapter will put the tracking system in perspective, whatever yourexperience level.


In our analysis of the issues involved in reporting information about people, we assume that you work in atypically managed software company. In this environment, your group is the primary user of the tracking systemand the primary decision maker about what types of summary and statistical reports are circulated. Under thesecircumstances, some types of reports that you can generate can be taken badly, as overreaching by a low leveldepartment in the company. Others will be counterproductive for other reasons, discussed below.

Butthe analysis runs differently if you work for a company that follows an executive-driven qualityimprovement program. In these companies, senior managers play a much more active role in setting qualitystandards, and they make broader use of quality reporting systems, including bug tracking Information. Thetracking system is much more of a management tool than the primarily project-level quality control tool that wediscuss in this chapter. These companies also pay attention to the problems inherent in statistical monitoring ofemployee behavior and to the risk of distracting a Quality improvement group by forcing it to collect too muchdata. Deming (1982) discusses the human dynamics of information reporting in these companies and the stepsexecutives must take to make these systems work.


The first sections analyze how an effective tracking system isused:
  • We start with a general overview of benefits and organizational risks created by the system.
  • Then we consider the prime objective of the system, its core underlying purpose. As we see it, the primeobjective is getting those bugs that should be fixed, fixed.
  • To achieve Its objective; id system must be capable of certain tasks. We identify tourrequirements.
  • Now look at the system in practice. Once you submit the report, what happens to it? Howdoes it get resolved? How does the tracking system itself help this process?
  • Finally, we consider the system's users. Many different people in your company use thissystem, for different reasons, We ask here, what do they get from the system, what otherinformation do they want, and what should you provide? There are traps here for theunwary.
The next sections of the chapter consider the details of thesystem.
  • We start with a detailed description of key forms and reports that most tracking systems provide.
  • Now you understand problem reporting and the overall tracking system design. We suggestsome fine points - ways to structure the system to increase report effectiveness and minimizeinterpersonal conflicts.
  • The last section in this group passes on a few very specific tips on setting up the online version of thereport form.

Problem Reports are a tester's primary work product. The problem tracking system and procedures will have moreimpact on testers reports' effectiveness than any other system or procedure.

You use a problem tracking system to report bugs, file them, retrieve files, and write summary reports about them. Agood system fosters accountability and communication about the bugs. Unless the number of reports is trivial, you needan organized system. Too many software groups still use pen-and-paper tracking procedures or computer-basedsystems that they consider awkward and primitive. It's not so hard to build a good tracking system and it's worth it,even for small projects.

This chapter assumes your company is big enough to have a test manager, marketing manager, project manager,technical support staff, etc. It's easier for us to identify roles and bring out some fine points this way. Be aware, though,that we've seen the same interactions in two-person research projects and development partnerships. Each person wearsmany hats, but as long as one tests the work of the other, they face the same issues. If you work in a small team, even asignificant two person class project in school (such as a full year, senior year project), we recommend that you apply asmuch of this system and the thinking behind it as you can.

This chapter describes a problem tracking system that we've found successful. We include the main data entry form,standard reports, and special implementation notes-enough for you to code your own system using any good databaseprogram. Beyond these technical notes, we consider the system objectives, its place in your company, and the effect ofthe system on the quality of your products.

The key issues in a problem tracking system are political, not technical. The tracking system is an organizationalintervention, every bit as much as it is a technical tool. Here are some examples of the system's political power and theorganizational issues it raises:

  1. The system introduces project accountability. A good tracking system takes information that hastraditionally been privately held by the project manager, a few programmers, and (maybe) theproduct manager, and makes it public (i.e., available to many people at different levels in thecompany). Throughout the last third of the project, the system provides an independent realitycheck on the project's status and schedule. It provides a list of key tasks that must be completed(bugs that must be fixed) before the product is finished. The list reflects the current quality of theproduct. And anyone can monitor progress against the list over a few weeks for a further check onthe pace of project progress.
  2. As the system is used, significant personal and control issues surface. These issues are standard onesbetween testing, programming, and other groups in the company, but a good tracking system oftenhighlights and focuses them. Especially on a network, a good system captures most of thecommunication between the testers and the programmers over individual bugs. The result is arevealing record that can highlight abusive, offensive, or time-wasting behavior by individualprogrammers or testers or by groups.

    Here are some of the common issues:

    • Who is allowed to report problems? Who decides whether a report makes it into the database? Who controls the report's wording, categorization, and severity?
    • Who is allowed to query the database or to see the problem summaries or statistics?
    • Who controls the final presentation of quality-related data and other progress statistics available from the database?
    • Who is allowed to hurt whose feelings? Why?
    • Who is allowed to waste whose time? Do programmers demand excessive documentation and support for each bug? Do testers provide so little information with Problem Reports that the programmers have to spend most of their time recreating and narrowing test cases?
    • How much disagreement over quality issues is tolerable?
    • Who makes the decisions about the product's quality? Is there an appeal process?Who gets to raise the appeal, arguing that a particular bug or design issue should not be set aside? Who makes the final decision?
  3. The system can monitor individual performance.It's easy to crank out personal statistics from thetracking system, such as the average number of bugs reported per day for each tester, or theaverage number of bugs per programmer per week, or each programmer's average delay before fixinga bug, etc. These numbers look meaningful. Senior managers often love them. They're often handyfor highlighting personnel problems or even for building a case to fire someone. However, if thesystem is used this way, some very good people will find it oppressive, and some not necessarilygood people will find ways to manipulate the system to appear more productive.
  4. The system provides ammunition for cross-group wars. Suppose that Project X is further behindschedule than its manager cares to admit. The test group manager, or managers of other projectsthat compete with Project X for resources, can use tracking system statistics to prove that X willconsume much more time, staff and money than anticipated. To a point, this is healthy accountability.Beyond that point, someone is trying to embarrass X's manager, to aggrandize themselves, or to get theproject cancelled unfairly - a skilled corporate politician can use statistics to make a project appear muchworse off than it is.
The key benefits of a good bug tracking system are the improvements in communication and accountability that getmore bugs fixed. Many of the personnel-related and political uses of the database interfere with these benefits bymaking people more cautious about what information they put on record, what reports they make or allow others tomake, and so on. We'll discuss some of these risks in more detail later. First though, consider the approach that webelieve works well.


A problem tracking system exists in the service of getting the bugs thatshould be fixed, fixed. Anything that doesn't directly support this purposeis a side issue.

Some other objectives, including some management reporting, are fully compatible with the system's prime objective.But each time a new task or objective is proposed for the system, evaluate it against this one. Anything that detractsfrom the system's prime objective should be excluded.


To achieve the system objective, the designer and her management must ensure that:
  1. Anyone who needs to know about a problem should learn of it soon after it's reported.
  2. No error will go unfixed merely because someone forgot about it.
  3. No error will go unfixed on the whim of a single programmer.
  4. A minimum of errors will go unfixed merely because of poor communication.
The minimalism of this task list is not accidental. These are the key tasks of the system. Be cautious about addingfurther tasks....
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Table of Contents


An Example Test Series.

The Objectives and Limits of Testing.

Test Types and their Place in the Software Development Process.

Software Errors.

Reporting and Analyzing Bugs.


The Problem Tracking System.

Test Case Design.

Testing Printers (and other devices).

Localization Testing.

Testing User Manuals.

Testing Tools.

Test Planning and Test Documentation.


Tying it Together.

Legal Consequences of Defective Software.

Managing a Testing Group.




About the Authors.

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Customer Reviews

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  • Anonymous

    Posted May 26, 2015


    end of coding, not coding end of not coding ¿ § §

    Coding<p>end of coding, not coding

    end of not coding ♥ § §</p>

    Was this review helpful? Yes  No   Report this review
  • Posted May 4, 2009

    Good choice for me

    I chose to buy this book based on other Customers' reviews, to keep it as a reference book for newcomers joining my team (Software Testing).
    Despite the fact that I've already gained a significant experience as both developer and tester, I found the content of this book very useful for me. This book was written some years ago, therefore some of its topic could be somehow obsolete today (for example the chapter dealing with automated test tools, a topic which interests me much), but many concepts are still valid and I found that many issues and critical aspects of software testing and test planning explained in this book have been (and still are) experienced in the Organization I work in.
    An useful reference book, with many hints for newcomers who first approach the software testing arena, but also with lots of useful points to think about for an experienced technician. For my specific case, I found the chapter dealing with managing a testing team really useful for me.
    I definitely recommend this book as a good reference for beginners and, to a good extent, also for skilled technicians.

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  • Anonymous

    Posted July 8, 2001

    Brilliant! Must-read!

    I've had the 2nd edition for about 7 years and still enjoy re-reading this book. Sure, the examples are getting dated now, but in some ways that makes it more interesting. But don't be misled - the core text and concepts are absolutely as relevant today as they ever were. Software testing and quality can be SUCH dry subjects, but the authors do a wonderful job of bringing them to life. This is a very practical book in the sense that testing processes are described from the point of view of someone who has tried almost everything and knows which approaches are great in theory vs those which actually work. Unlike many others, the book doesn't skirt around human resources issues (such as internal politics, motivation and staff retention) but tackles them head on in the last chapter (it really is worth reading cover-to-cover!). The bottom line: a must read for anyone involved in releasing software.

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