In the overwhelming majority of projects I have worked on - the challenge was less building the right thing incorrectly but building the wrong thing correctly.

In the overwhelming majority of projects I have worked on - the challenge was less building the right thing incorrectly but building the wrong thing correctly. As a senior management at one company once told me: "That may be what I asked for, but its not what I want" - which is an extreme view but not untypical in lots of domains.