Requirements, Password-reset feature is missing even though the client requested it., Communication, Client says reports must be “quick”; developer assumes 10 seconds, client expects 2., Design / logic, Boundary condition is interpreted incorrectly in the system design., Coding, Programmer uses age > 18 instead of age >= 18., Testing process, A serious defect is found but never logged or reported., Documentation, user manual contains the wrong installation steps.

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