CHAPTER 4: FLOW PERIOD ANALYSIS

4. 3 Approaches to the Problem Established

Problem four. 1

[a]Bring a process stream diagram.

[b]. The theoretical circulation time is 36 mins:

You will find three routes through the system:

A: Have Order вЂ“ Food вЂ“ Deliver вЂ“ Bill в†’ 4 & 18 & 12 & 2 = 36 minutes B: Have Order вЂ“ Wine вЂ“ Deliver вЂ“ Bill в†’ 4 & 4. 8 + doze + 2 = twenty-two. 8 a few minutes C: Have Order вЂ“ Cart вЂ“ Deliver вЂ“ Bill в†’ 4 & 10 + 12 & 2 sama dengan 28 a few minutes

Path A is critical therefore the TFT is 36 moments

[c]. The flow time effectiveness is 36/60 = 60 per cent

Problem 4. 2

[a]The flow chart of the process is just as shown in Figure TM-4. 1 .

Physique TM-4. 1 . Flow graph and or chart of the Kristen Cookies Procedure flow

Flow unit = 1 purchase of 1 dozen the theoretical flow time is 21 minutes. This really is determined by adding the activity times from seed to fruition for one particular dozen cookies.

[b]Flow unit = you order of 2 dozen. To determine the theoretical movement time for this flow device, we initial observe that particular activities can be carried out in seite an seite. For example , even though the oven can be baking the first dozen, You can place the money for the 2nd dozen in another tray. Therefore , the flow time of such an order is not merely the amount of the activity times. A useful tool is a Gantt chart that shows the days during which different resources of interest will be occupied intended for various actions. A Gantt chart pertaining to the three assets executing a great order of two dozen cookies is proven in Physique TM-4. 2 . The dough for the 2 dozen cookies is merged by You in 6th minutes and subsequently you spoon money for one particular dozen in 2 a few minutes. Therefore inside the 8th day, the RM is ready to weight the the oven and set timer, which will take 1 tiny. The range starts preparing the initial dozen with the 9th small and completes baking in the 18th small. Meanwhile, You spoon the other dozen into another dish. At the 18th minute, the RM unloads the first tray from the oven and loads the second tray in the oven and sets the timer. Therefore the second number of starts cooking at the nineteenth minute. While the second number of bakes, the first dozens of cookies cool and RM packs them into a carrier, which uses a total of 7 minutes. At the 28th small the second dozens of finishes baking at which time the RM unloads the tray. Following cooling pertaining to 5 minutes, the RM bags the second dozens of in 2 minutes by the 35th minute. Finally, payment for the order and delivery to customer takes place in the 36th minute. And so the theoretical circulation time for an order of two dozen cookies is 36 minutes.

An alternate way to compute the theoretical circulation time is definitely using the idea of bottleneck solutions (discussed in Chapter 5). Oven is definitely the bottleneck source with a couple of minutes of activity per dozens of cookies. Note that the 1st dozen goes into the the oven at the end of 8 a few minutes. The second number of will go in to the oven 10 minutes after the first dozen. Consequently , the theoretical flow time of the second dozen = theoretical flow moments of the 1st dozen + activity time at the bottleneck = 26 + 10 = thirty-six minutes. Similarly, theoretical movement time of a few dozen sama dengan theoretical flow time of the first dozen + 2 * activity time with the bottleneck = 26 + 2*10 sama dengan 46 minutes.

Figure TM-4. 2: Gantt Chart for Kristen's Cookie; order size = 2 dozen.

1 ) With two ovens, the baking in the two dozens of can be overlapped. So You can place the second dozens of into one more tray by 10th minute. At this time, the RM is ready to load the 2nd oven. The 2nd oven will finish preparing the second number of by the twentieth minute. The first dozen is out of the oven at the 18th day after which it cools pertaining to 5 minutes after which the RM packs them in a couple of minutes concluding at 25th minute. By now, the second dozens of has cooled and ready to always be packed which in turn takes one other 2 moments. Payment and delivery takes another you minute finishing the buy in 28 minutes. installment payments on your With a single big oven, both racks get loaded into the the oven at the end of the10th day. The termes conseilles is set only once; the the baking starts on the 11th day and completes at small 20. The 2 trays...

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