Question: TASKS Predecessor Task Time A Warm tortilla -none 20 sec B Rice -A 10 sec C Beans -B 10 sec D Meat -B 10 sec

TASKS

Predecessor

Task Time

A

Warm tortilla

-none

20 sec

B

Rice

-A

10 sec

C

Beans

-B

10 sec

D

Meat

-B

10 sec

E

Salsa

-C, D

10 sec

F

Cheese

-E

5 sec

G

Sour Cream

-E

10 sec

H

Lettuce

-E

10 sec

I

Wrap

-F, G, H

15 sec

J

Bag

-I

5 sec

K

Checkout/pay

-J

25 sec

1. What is the total task time (sum of tasks).

2. What is the minimum C.T., and the maximum C.T.?

3. Draw a precedence diagram:

4. If the operations manager wants to achieve 100 burritos per hour, what is the cycle time?

5. Achieving the above cycle time and output, what is the theoretical number of workstations?

6. Assign tasks to workstations:

7. Efficiency of your burrito line:

8. Actual output per hour:

9. What if demand were such that 200 / hour were needed?

10. What is the maximum # of burritos that can be produced in an hour with these specific times/tasks?

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