A bank of ten machines requires regular periodic service. Machine running time and service time are both exponential. Machines run for an average of 44 minutes between service requirements, and service time averages 6 minutes per machine
Which of these would reduce perceived waiting times most dramatically in a doctor's office?
A. putting all clocks out of sight
B. removing couches
C. having the patient fill out forms
D. implementing a "no-cell-phone" policy
E. keeping expected waiting times from the patients