Kristin Cookie Case

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Kristen Cookie Case 1. For order size 2 dozen: What is the process throughput time? What is the bottle neck process? How many cookies can be produced in a 4-hour working night? To determine the throughput time for an order of 2 dozens, we first observe that certain activities can be performed in parallel. For example, while the oven is baking the first dozen, you can spoon the dough for the second dozen into another tray. Therefore, the flow time of such an order is not simply the sum of the activity times. Please see the Gantt chart attached below that shows the times during which different resources of interest are occupied for various activities. The dough for the 2 dozen cookies is mixed by you in 6 minutes and subsequently you spoon dough for 1 dozen in 2 minutes. Therefore in the 8th minute, the roommate is ready to load the oven and set timer, which takes 1 minute. The oven starts baking the first dozen at the 9th minute and completes baking at the 18th minute. Meanwhile, you spoon the second dozen into another tray. At the 18th minute, the roommate unloads the first tray from the oven and loads the second tray into the oven and sets the timer. So, the second dozen starts baking at the 19th minute. While the second dozen bakes, the first dozen cookies cool and roommate packs them into a bag, which takes a total of 7 minutes. At the 28th minute the second dozen finishes baking at which time the roommate unloads the tray. After cooling for 5 minutes, the roommate packs the second dozen in 2 minutes by the 35th minute. Finally, payment for the order and delivery to customer takes place in the 36th minute. Therefore the throughput time for an order of 2 dozen cookies is 36 minutes. Throughput Time = 36min The Duration of the bottleneck = (Setting thermostat and Timer) + (Baking Cookies) = 1 minute + 9 minute = 10 minutes 4 hours per each night

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