This book deals with an abstract topic - how to carry out a process improvement program. Process improvements themselves are abstract, a program even more so.
The author reduces this to a practical level. Develop the plan, implement, assess. He's focussed on identifying problems before solutions and cautions against adoption of wholesale quality frameworks like ISO 9000 or CMM.
A lot of what's said seems like common sense - but for me my intuitions and hunches were given credence with his explanations as to why these things were appropriate. For instance, some groups are more receptive than others to change. Potter notes this as a reality and breaks groups down into innovators, early adopters, early majority, late majority and laggards - explaining how to deal with each group. This is the sort of practical support that makes this book useful.
There are sections on metrics ( how to measure improvements ) and mini-assessments. Seems like common sense, but not everyone will think of these things.
Overall a good read if you're looking to change the way things are done in a technology environment. You will probably learn things, and find you have an ally in a published author.