Panbo Inc. is a fast food restaurant which offers 4 main types of sandwiches: Pa

Question

Panbo Inc. is a fast food restaurant which offers 4 main types of sandwiches: Pando – classic (C), Pando – premium (P), Pando – exotic (E), and Pando – ultimate (U). Every day, the restaurant operates for 10 hours and it is expecting to sell 500 sandwiches. And from the past data, 30% of the demand is for C, 20% is for P, 45% is for E, and 5% is for U. There are up to five steps in the process of making sandwiches, listed below with activity times. 70% of customers want their sandwich toasted, no matter which sandwich is ordered. Step Classic Premium Exotic Ultimate Prepare bread .75 minutes .75 minutes 1 minute 1 minute Prepare meat .5 minutes .8 minutes 1.5 minutes 1.5 minutes Toast .5 minutes .5 minutes .5 minutes .75 minutes Wrap .5 minutes .5 minutes 1 minute .5 minutes Checkout .5 minutes .5 minutes .5 minutes .5 minutes Suppose that there is one worker at each step. Answer the following questions. 1. Defining one flow unit as one minute of work, what is the capacity per day for the worker at “Toast” step? Round your answer to the nearest integer. Your answer is . (1 point) 2. Defining one flow unit as one minute of work, what is the demand rate per day for the worker at “Toast” step? Round your answer to the nearest integer. Your answer is . (1 point) 3. The implied utilization rate for the worker at “Toast” step is . Ignore the percentage sign and round your answer to the nearest integer. For example, if your answer is 43.21%, input 43. (1 point) 4. The implied utilization rate for the worker at “prepare bread” step is . Ignore the percentage sign and round your answer to the nearest integer. For example, if your answer is 43.21%, input 43. (1 point) 5. The implied utilization rate for the worker at “prepare meat” step is . Ignore the percentage sign and round your answer to the nearest integer. For example, if your answer is 43.21%, input 43. (1 point) 6. The implied utilization rate for the worker at “Wrap” step is . Ignore the percentage sign and round your answer to the nearest integer. For example, if your answer is 43.21%, input 43. (1 point) 7. Worker at which step is the bottle neck resource? Input 1 for the worker at “prepare bread” step; input 2 for the worker at “prepare meat” step; input 3 for the worker at “toast” step; input 4 for the worker at “wrap” step; and input 5 for the worker at “checkout” step. Your answer is . (1 point) 8. The manager expects a demand increase for all sandwiches due to a promotion. The daily total demand is estimated at 640 sandwiches under this promotion. The demand distribution among the four types of sandwiches also shifts to 25%, 25%, 40%, and 10% for C, P, E, and U sandwiches. Other parameters stay the same. The implied utilization rate for the worker at “Toast” becomes . Ignore the percentage sign and round your answer to the nearest integer. For example, if your answer is 43.21%, input 43. (1 point) 9. Under the new demand distribution, worker at which step is the bottle neck resource? Input 1 for the worker at “prepare bread” step; input 2 for the worker at “prepare meat” step; input 3 for the worker at “toast” step; input 4 for the worker at “wrap” step; and input 5 for the worker at “checkout” step. Your answer is . (1 point)

Explanation / Answer

1. Capacity per hour of Sandwiches C,P and E is 120, while that of sandwich U is 80.

Capacity of toasting 1/c = 1/120+1/120+1/120+1/80

c= 80/3 = 26.8 =27

2.Demand rate per day at toast step = 500x0.70 = 350 sandwiches.

3. Utilisation at the toast step = engagement time / total time =

0.7(150x0.5+100x0.5+225x0.5+25x0.75 ) /600

= 0.7x 256.25/600 = 29.89%

4. Utilisation at prepare bread = 150x0.75+100x0.75+1x225 +1x25 /600 = 437.5 /600 =72.91

5.Utilisation at preprare meat =150x0.5+100x0.8+225x1.5+25x1.5 = 530 /600 =88.33 %

6.Utilisation at wrap = 150x0.5+100x0.5+225x1+25x0.5 =362.5/600= 60.41%

7.Prepare meat has the lowest output per hour

1/c = 1/40+1/40+ 1/75+1/120 = 13.95

hence it is the bottleneck.

C P E U No.expected 150 100 225 25 Prepare bread 0.75 0.75 1 1 Prepare meat 0.5 0.8 1.5 1.5 Toast 0.5 0.5 0.5 0.75 Wrap 0.5 0.5 1 0.5 Checkout 0.5 0.5 0.5 0.5

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