Using Lean methodologies, I have to optimize both product and people flow in an old printing house. The building has 3 floors with two elevators on one side. This printing house uses a "Soviet-designed" industrial building, which means there are lots of corridors and every machine has its own room. The final result of the analysis will likely be to break down some walls, design some working cells, and so on.
How can I draw a Spaghetti Diagram for both product and people flow in this environment? I have 3 other people that I can assign to this task. Since there are lots of different rooms, the use of cameras to record movements of products and people would be useless. What else could I do?