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Organizational Patterns of Agile Software Development
Organizational Patterns of Agile Software Development starts by describing the foundations of the authors' research. There are definitions of a "pattern" (but "your intuition about the meaning of the term will take you far") and of a "pattern language" (read the book), the history of their research, and some information about how the book is laid out. The authors recommend you read this section, and so do I; but if it's too dry for you, by all means move on.
The meat of this book is four pattern languages: how to manage a project, how to grow it over time, what can make up an organization's "style" (I'd use the word "culture"), and how the people fulfill their roles and interact with each other. These are not prescriptions or algorithms; they're elements of how successful organizations have worked.
Each pattern describes one aspect of some effective software development organizations. Some patterns are found in more than one pattern language; "Community of Trust" is common to all. Others are less general; "Moderate Truck Number" applies only to the "piecemeal growth" pattern language.
How valuable are the patterns? Some (such as "Get On With It", proceeding with an effort before the planning is considered complete) are common sense. Others (for example, "Don't Interrupt an Interrupt") are things you probably know, but might need to be reminded of ... or might need to remind your boss of. More than a few (my favorite is "Architect Also Implements") might help you understand how something could or should work. Finally, there are some patterns here (such as the "Day Care" pattern for training new members) that might be new to you.
The rest of the book puts the patterns and pattern languages into perspective. There are chapters on organizational principals and (seriously) anthropological foundations of this work. Then there are two case studies of very successful projects. On one, "[about one] million lines of code were written over a period of 31 months by about eight people (that's about 1,000 lines of code per person per week) -- that doesn't include code in the [two] prototypes." It's easy to crank out code at that rate for small bursts, or on small projects. To stay at that pace constantly for over two and half years is nothing short of astounding. The resulting product was released to great reviews. (It then did poorly in the marketplace when it went head-to-head with a directly competing product from Microsoft. Sound dissatisfying? Consider how very long people waited impatiently for Mozilla and its successors such as Firefox. More directly, look at Robert Glass's assertion of the "disconnect between managers and their programmers" as to what projects are seen as successful; it's Fact 13 in Glass's book reviewed August 30th on Slashdot.)
What's imperfect about this book? A couple of things.
First, sometimes the language gets too academic for easy reading. Example: "We have also seen a lighter though almost equally destructive form of this phenomenon, which we describe as schismogenesis.... Symmetrical schismogenesis occurs when two factions each rise in power (or in fear or distrust of each other) and form cliques or splinter groups that tend to focus inward rather than resolve issues in the dialogue with each other." Clear enough if you work on it, but a little intimidating.
Second, the book is surprisingly partisan on some subjects. The book is not kind either to ISO 9000 or Extreme Programming; it could serve as a sort of litmus test, delighting critics and coming across to supporters as unfairly harsh.
What's good about this book? It's a collection of good information, well presented, with information on how to apply it, on a topic where not much knowledge has been accumulated. For some specific circumstances, this book sometimes points out different likely alternatives, with information on when each is applicable. Don't expect Organizational Patterns for the Complete Dummy; then again, don't expect anything useful to be superficial.
How could Coplien and Harrison's work apply to open source development? For starters, they point out the value of people working physically together, and of individual code ownership; these aren't easily applied to open source, but at least it points out forces that need to be resolved somehow. On the other hand, some patterns here are hugely relevant to open source: "Work Queue," "Informal Labor Plan," "Self-Selecting Team," and "Team Pride" come to mind.
Organizational Patterns of Agile Software Development is no panacea. If your organizational practices are the opposite of what's found to be effective, you may find this book frustrating. A book can't take your organization where it needs to go; but Coplien and Harrison have put up some road signs.
You can purchase Organizational Patterns of Agile Software Development from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.
...about patterns and architecture and such - On the Nature of 'The Nature of Order'.
It's a fairly short paper and can give you an idea of his style - or at least his style as it was 7 years ago.
The Army reading list
The book is On Line. Go, read it.