no references or citations necessary
Touring a Process. go to either a  post office, a department store, or supermarket and observe one or more key processes, the associated suppliers, inputs, process steps, outputs, customers, the measurement systems, and how the measurements are used to manage and improve the process. Include these items:

where did you visit?
Process observed.
SIPOC elements.(Suppliers, Inputs, Processes, Outputs and Customer)
Process measurements.
Process management systems used.