5W2H stands for 5 Ws and 2Hs or Who, What, When, Where, Whey How and How much.
When working on improving a process this is a very simple tool to help you think thorough improvement opportunities.
Who does this? This can lead to, could we do it with less people?
What is done at this step? This can lead to, can we eliminate some of the steps?
When does this start and finish? This can lead to, can we shorten the time it takes?