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Title: Introduction to the Personal Software Process(sm) by Watts S. Humphrey ISBN: 0-201-54809-7 Publisher: Addison-Wesley Professional Pub. Date: 20 December, 1996 Format: Paperback Volumes: 1 List Price(USD): $29.99 |
Average Customer Rating: 3.67 (3 reviews)
Rating: 4
Summary: Measure everything, interpret carefully
Comment: The Personal Software Process (PSP), which is a registered service mark of Carnegie Mellon University, is all about measuring and recording. Nearly everything is measured, from lines of code produced per unit time to the time spent playing/watching sports. Charts are everywhere in the book; some plot the progress of software development projects and others the weekly schedule of a college student. Therefore, there are charts that are headed "Student Y's Fixed Weekly Commitments."
The initial premise of the book is that of a college student who must plan their time in order to complete all that needs to be done. Of course, the point is to emphasize that planning major projects, such as your life, requires that you set reasonable goals that are compatible with everything else that you want to do. Once the goals are set, the next step is to order your time so that all activities are allotted an appropriate time slot.
The second segment deals with tracking a software development process from start to end. It is all about time, how much you expect to spend on each section and how much was actually spent. The goal is to track now so that your future projections are more accurate. With so many charts and entries, there is nothing that can be measured that does not appear somewhere in a chart.
While I am a proponent of measuring and recording the significant characteristics of any project, one must take care to avoid an over reliance on the act of measuring. Even though software development is a team game, it is still very much an individual effort. There is a great deal of room for the occasional "brilliant stroke", where someone has a flash of insight into a problem that solves it in a new, unique and more efficient manner. The best programmers are still in many ways artists and regimentation can stifle their creative sides.
The PSP is also different from the agile processes, which reduce the software planning cycle to a few weeks rather than a longer term. Very little is also written down in agile processes, and planning to the minute is considered counterproductive. However, even if you are a firm believer in the agile approach, reading this book will be of value. When you write down very little, you must make sure that what is written down is important, so by studying the PSP, you have a better chance of recording what is critical.
Humphrey is on one end of the software development spectrum, in that he sets down a process with extensive planning. Agile processes are on the other end, where there is a minimum of planning. Most development groups will find their best location somewhere in the middle. Since the best way to find your location is to study the extremes, all software developers will find value in this book.
Rating: 3
Summary: This is a great book if
Comment: This is a great book if you have never, like me, had any type of process education or formal time management training. I wish this book was available 15 years ago when I took my first CS class in college.
For the working programmer, especially in today's visual integrated environment, applying alot of the material is hard. The Lines of Code (LOC) measurement used is not considered the best judge of program complexity, plus in a visual environment where one can spend days laying out forms or reports that generate no lines of code can skew numbers. I understand its use: It is easy to explain and calculate for beginners, but is lacking for working programmers.
There is also an emphasis on distinct phases of program development, particularly the compile and test phase. For those of us who work in a visual environment (be it C, Pascal, or Basic) the phases blur together and tracking time spent on compile is negligable. Also not mentioned is should intentional syntax errors (such as going to copy a variable name) that automatic syntax checking catches be tracked?
The extreme academic bend of the book also begins to annoy after awhile. The use of "small programs" to work with on the job is rare. Tracking number of lines changed can be tough in large programs, even with source code controls in place. The base code review checklist is extremely simple (intentionally) and aimed at C or Ada programmers, leaving other languages hanging.
One last annoyance: Many of the forms talked about are not available to print or use in a spreadsheet. The one form most working programmers would use, the time log, is the most glaring example.
If you meet either of the requirements in the first paragraph, read the book. You will find something of use. Just about anyone in the field would benefit from chapters 3 and 7 (in particular) since we all tend to have problems estimating how much time things will take.
Lastly, most of the data used to show how things improved after using the Personal Software Process was from 2 groups, one "real world" company and a group of students. Both groups only had around 15 people. Even combining both groups a sample of 30 programmers is not overwelming evidence. A larger sample is needed.
Although only 3 years old, to me the book needs to be updated. Larger samples for the improvement examples, handling non-code artificts such as forms and program documentation, and making sure that all of the forms are available on standard size paper (8.5x11 or A4) would be a good starting place.
Rating: 4
Summary: Good if you are a first or second year college student, but
Comment: I originally bought this book to improve my own software engineering habits. While this book has its merits, I am afraid that it is geared more toward the first and second year college student than the professional engineer. It specifically addresses student issues, and most of the lessons are not applicable to professional work environments. However, if you happen to be a college student in CE, then I would suggest this book as a primer. Humphrey is very detailed in his explanation and extremely epxerienced in this field.
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Title: Introduction to the Team Software Process(sm) by Watts S. Humphrey ISBN: 020147719X Publisher: Addison-Wesley Professional Pub. Date: 24 August, 1999 List Price(USD): $54.99 |
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Title: A Discipline for Software Engineering by Watts S. Humphrey ISBN: 0201546108 Publisher: Addison-Wesley Professional Pub. Date: 31 December, 1994 List Price(USD): $64.99 |
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Title: Managing the Software Process by Watts S. Humphrey ISBN: 0201180952 Publisher: Addison-Wesley Professional Pub. Date: 01 January, 1989 List Price(USD): $64.99 |
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Title: Winning with Software: An Executive Strategy by Watts S. Humphrey ISBN: 0201776391 Publisher: Addison-Wesley Pub Co Pub. Date: 20 December, 2001 List Price(USD): $34.99 |
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Title: Peer Reviews in Software: A Practical Guide by Karl E. Wiegers ISBN: 0201734850 Publisher: Addison-Wesley Pub Co Pub. Date: 15 December, 2001 List Price(USD): $39.99 |
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