Final answer:
Little's law is used to calculate the relationship between the average number of customers in a system, the arrival rate of customers, and the average time a customer spends in the system.
Step-by-step explanation:
Littles's law is a principle used in queueing theory to calculate the relationship between the average number of customers in a system, the arrival rate of customers, and the average time a customer spends in the system.
The formula for Little's law is:
Average number of customers = Arrival rate x Average time spent in the system
Therefore, in the context of surgeries, the maximum sustainable average number of surgeries per week can be calculated by multiplying the arrival rate of surgeries per week by the average time spent on a surgery.