Identify the process to be analyzed. This will be one which involves a significant amount of movement by people, materials or both.
Produce a scale map of the work area, not including machines, but including items that cannot easily be moved, such as power points, air lines, etc. This may be available from the site office.
Add all machines, furniture and other equipment to the diagram. If possible, do this in a way that will allow these to be moved, for example by using shaped pieces of card that can be pinned to the work area map from step 2.