If we have properly engaged leadership and stakeholders, and gone through a rigorous assessment, we should have a fairly clear picture of the size and shape of our fatigue problem. This makes defining our set of solutions a bit simpler. We no longer have to guess what issues we need to address.
Our primary goal in the Define phase is to create a practical, effective management system. A system that predicts, measures and mitigates fatigue and distraction and provides operators tools and knowledge to improve their alertness.