I have to draw a process flow diagram for operations manage to of a gas station. What are the key activities (stages) in the process? What are the inputs to the process and what is the output? What is the flow unit? What are the resources at each stage of the process? Are any of the resources shared between stages or with other processes? Can you estimate a cycle time at one or more stages in the process? What is the bottleneck? not sure where to start