Section I. Agile Development

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© Jennifer M. Kohnke

Human interactions are complicated and never very crisp and clean in their effects, but they matter more than any other aspect of the work.

—Tom DeMarco and Timothy Lister, Peopleware

Principles, patterns, and practices are important, but it’s the people who make them work. As Alistair Cockburn says: “Process and technology are a second-order effect on the outcome of a project. The first-order effect is the people.”1

We cannot manage teams of programmers as if they were systems made up of components driven by a process. To use Alistair Cockburn’s phrase, people are not “plug-replaceable programming ...

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