Problem Frames: analyzing and structuring software development problems. Michael Jackson
Jackson is back with a follow up to his landmark Software Requirements & Specifications. This time he has lent his wit and intelligence to analysing and structuring the kind of problems faced by the software developer. Jackson argues that software development is about solving problems where there are very few well-understood problems. The aeronautical engineer does not have to be told that the plane has to fly and carry passengers, and by the way, take off and land. But as software is so malleable, we are usually faced with problems that very little of the basis is known.
His inference is that you must start by asking: What kind of problem is this? What purpose is being served in the world? What behaviour and properties must the computer have to achieve that purpose? JacksonÕs problem analysis takes you from the level of identifying the problem to the level of making the descriptions needed to solve it.
The central idea of this book is to use problem frames in problem analysis and structure. A problem frame defines the shape of a problem by capturing the characteristics and interconnections of the parts of the world it is concerned with, and the concerns and difficulties that are likely to arise. So problem frames help you to focus on the problem, instead of drifting into inventing solutions.
Jackson is always informative and thought-provoking. Not a bad combination.