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Extreme Programming Installed by Chet Hendrickson, Ann Anderson, Ron Jeffries

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Distributed Manufacturing Control System

You are building a new microcomputer-based distributed factory control system. There will be these cool little micros at each station, all networked together, cooperating to control the entire factory. You need control modules and control programs for all the machines that might be there in the factory. And you need a very sophisticated distributed object system to make sure it all works. There's just no way you can release anything early.

Well, how about releasing a single module that controls some specific machine, and that plugs into the legacy system, emulating an old-fashioned controller. Surely your micro-based system could raise and lower a few electrical levels to make it look like the old modules ...

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