BE1401 Week 2.2

Consider again the example of the three-step airport security.  The first step, verifying ID and boarding pass, takes 30 seconds per passenger.  The second step, searching the passenger for metal objects using a metal detector, takes 10 seconds per passenger.  The third step, running the carry-on luggage through an X-ray machine, takes 60 seconds per passenger.  Assume that there are many customers waiting in the process. Which resource is the bottleneck?

• Verify ID

• Metal Detector

• X-Ray machine

• Queue

At the airport security check, there are three steps. The first step, verifying ID and boarding pass, takes 30 seconds per passenger. The second step, searching the passenger for metal objects using a metal detector, takes 10 seconds per passenger. The third step, running the carry-on luggage through an X-ray machine, takes 60 seconds per passenger. Assume that there are many customers waiting in the process.

What is the capacity of the process?

• 1/30 passenger / secs

• 1/10 passenger / secs

• 1/60 passenger / secs

• 1/100 passenger / secs

At the airport security check, there are three steps. The first step, verifying ID and boarding pass, takes 30 seconds per passenger. The second step, searching the passenger for metal objects using a metal detector, takes 10 seconds per passenger. The third step, running the carry-on luggage through an X-ray machine, takes 60 seconds per passenger. Assume that there are many customers waiting in the process.

What is the flow rate?

• 1/30 seconds per customer

• 1/10 seconds per customer

• 1/60 seconds per customer

• 1/100 seconds per customer

At the airport security check, there are three steps. The first step, verifying ID and boarding pass, takes 30 seconds per passenger. The second step, searching the passenger for metal objects using a metal detector, takes 10 seconds per passenger. The third step, running the carry-on luggage through an X-ray machine, takes 60 seconds per passenger. Assume that there are many customers waiting in the process.

What is the utilization of the metal detector?

• 1/2

• 1/3

• 1/6

• 1/10

At the airport security check, there are three steps. The first step, verifying ID and boarding pass, takes 30 seconds per passenger. The second step, searching the passenger for metal objects using a metal detector, takes 10 seconds per passenger. The third step, running the carry-on luggage through an X-ray machine, takes 60 seconds per passenger. Assume that there are many customers waiting in the process.

What is the cycle time?

• 30 seconds

• 60 seconds

• 90 seconds

• 100 seconds

Consider the following example of the three-step process.

The first step takes 20 minutes/unit.

The second step takes 10 minutes/unit.

The third step takes 15 minutes/unit.

Each step is staffed by one worker. What is the labor content of the process?

• 20 minutes / unit

• 10 minutes / unit

• 15 minutes / unit

• 45 minutes / unit

Consider the following example of the three-step process.

The first step takes 20 minutes/unit.

The second step takes 10 minutes/unit.

The third step takes 15 minutes/unit.

Each step is staffed by one worker. Assuming unlimited demand, which is the bottle neck?

• Step 1

• Step 2

• Step 3

• No bottleneck since there is unlimited demand

Consider the following example of the three-step process. The first step takes 20 minutes/unit. The second step takes 10 minutes/unit. The third step takes 15 minutes/unit. Each step is staffed by one worker.

There is unlimited demand and process capacity is 1/20 unit per minute. What is the cycle time?

• 20 mins / unit

• 10 mins / unit

• 15 mins / unit

• 45 mins / unit

Consider the following example of the three-step process. The first step takes 20 minutes/unit. The second step takes 10 minutes/unit. The third step takes 15 minutes/unit. Each step is staffed by one worker.

Flow rate is 20 mins/unit. What is the idle time?

• 5 mins / unit

• 10 mins / unit

• 15 mins / unit

• 20 min / units

Consider the following example of the three-step process. The first step takes 20 minutes/unit. The second step takes 10 minutes/unit. The third step takes 15 minutes/unit. Each step is staffed by one worker. The idle time is 15 mins. What is the Average Labor Utilization?

• 0.25

• 0.5

• 0.75

• 1