Checklist

Bonjour,My question is not related to PMDG plane, but I think it is the best place to have a good answer. Can somebody help me to understand the different concept behind panel scan,procedure, expanded checklist,and read checklist.Is the panel flow diagram use to describe the scan done before the procedure?Are procedure and expanded checklist 2 words to define the same thing ?I read that some item marked flow in the expanded checklist are only accomplish during the procedure, I would like to know if those items are also challenged out and responded in the expanded checklist as in the read checklist.Does it mean that during a phase each crew member executes the procedure (during the panel scan) in his area of responsibility , then the expanded checklist is executed with challenge and responds, to finish with the read checklist. As you can see all these things are not very clear for me.Thanks in advance for you helpClaude Troncy