The present fixed inter-appointment time of 40 min has been decided by the management and technicians with their experience only on the basis of the average time required to perform an MRI investigation. No classification among the patients is made for sequencing or adjustment in inter-appointment times, and the patients are scheduled in order as the calls arrive or on the basis of patient's preferences. The management, technicians and the staff reveal that at present with the existing appointment system, even though the total number of patients investigated per day is usually less than the total number of available slots (i.e., 18), it is found that there is significant waiting time among the scheduled as well as walk-in patients. This is also confirmed by the data collected. At present, a scheduled patient has to wait for more than 45 min on an average and a walk-in patient has to wait for more than 70 min.The scheduling personnel at the department wish to obtain practical guidance to aid with scheduling decisions. The specific questions that are to be addressed are: Whether a classification scheme used for sequencing the patients may be beneficial for improving the performance of the appointment system and whether the fixed equidistant inter-appointment time of 40 min is appropriate for an acceptable performance or variable inter-appointment times should be used