A client of mine, many years ago, was very frustrated that their project plans were never stuck to. They were baffled as to why their perfectly good (and well thought out) plans always failed. Due to this frustration I was asked to have a look at their plans. Although I wasn’t an expert in their line of work I was able to ask a few questions that were relevant. We worked through the sequence and the work contents which all seemed fine. I then asked about the resourcing and finally struck something that was awry with the plan.