The purpose of the DEFINE of the Six Steps DMAIEC is determining who is considered one of the most important problems. And should be able to explain why the problem is perceived is very important for the improvement. Is the problem in question is important for the service / product, or strongly influence the organization’s strategic. What is the impact if the problem was quickly resolved. How large a gap caused. It is important to consider, because if it feels not too important then the improvement process will be felt perfunctory and not serious.