Today I was working on finding relevant business services. As normal I used criteria like good abstractions, good separation of concerns, maximum cohesion and minimum coupling, added value of a cohesive set, in the numbers 7 +/- 2 for any level and a relevant service requestor could be found. But the design decisions I made did not completely satisfy me. Suddenly a thought struck me: just as in database theory there should be service normal forms, with standard rules to get to, validate and optimize the correct services.
Surfing internet it turned out that others had already had the same thought. They are researching "what kind of properties a "good" service should have". I will read it and come back on this subject later.
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