Answer:
During these nights, they are in the zone of non-service.
Step-by-step explanation:
a) Data From Friday and Saturday nights:
Number of customers arriving per hour for service = 140
Estimated capacity for serving average number of customers = 120/h
b) Determination of service zones:
1) The "Zone of Service" occurs when service is below 70% of capacity, there is little or no wait time for customers, and customers will be happy.
2. The "Critical Zone" is when service is between 70-100% capacity. All their customers will be attended to without hassles, and customers will be satisfied.
3. The "Zone of Non-Service" occurs when the capacity of service is beyond 100%. Many customers will wait, some may not be attended to, and many others will not be happy nor satisfied.