# A customer goes to a coffee shop, waits in the queue and places his order. Entry: The Cycle Time is 1.5 mins/customer The Throughput is 0.66 customers/min The Capacity is 40 customers/hr Order Taking: The Cycle Time is 1.8 mins/customer The Throughput is 0.55 customers/min The Capacity is 33 customers/hr Using Little’s Law, please explain with steps, how to determine the number of people in the queue (buffer) and the time they spend in the queue.

A customer goes to a coffee shop, waits in the queue and places his order.

Entry:

The Cycle Time is 1.5 mins/customer

The Throughput is 0.66 customers/min

The Capacity is 40 customers/hr

Order Taking:

The Cycle Time is 1.8 mins/customer

The Throughput is 0.55 customers/min

The Capacity is 33 customers/hr

Using Little’s Law, please explain with steps, how to determine the number of people in the queue (buffer) and the time they spend in the queue.

## Solution

Since arrival is 0.66 customers/min (since throughput of entry is 0.66 customers/min)

and

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