Decomposing a system into subsystems reduces the complexity developers have to deal with by simplifying the parts and increasing their coherence. Decomposing a system into simpler parts usually results into increasing a different kind of complexity: Simpler parts also means a larger number of parts and interfaces. If coherence is the guiding principle driving developers to decompose a system into small parts, which competing principle drives them to keep the total number of parts small?
What will be an ideal response?
Decreasing coupling is the principle that competes with increasing coherence. A large number of parts will result in a
large number of interfaces and many dependencies among the parts.
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