代写运营管理作业 Operations Management代写

Operations Management

Final Review Session 1 

 代写运营管理作业 When a box has been filled with 10 bottles,a worker tending the packaging machine removes the filled box and replaces it with an empty box.

Question 1. Yoggo Soft Drink  代写运营管理作业

A small, privately owned Asian company is producing a private-label soft drink, Yoggo. A manufacturing line puts the soft drinks into plastic bottles and then packages the bottles into boxes holding 10 bottles each. The manufacturing line is comprised of the following four steps: (1) the bottling machine takes 1 second to fill a bottle, (2) the lid machine takes 3 seconds to cover the bottle with a lid, (3) a labeling machine takes 5 seconds to apply a label to a bottle, and (4) the packaging machine takes 4 seconds to place a bottle into a box.

When a box has been filled with 10 bottles,a worker tending the packaging machine removes the filled box and replaces it with an empty box. Assume that the time for the worker to remove a filled box and replaces it with an empty box is negligible and hence does not affect the capacity of the line. At step 3, there are two labeling machines that each process alternating bottles, that is, the first machine processes bottles 1,3,5,. . . and the second machine processes bottles 2,4,6,. . . Problem data are summarized in the table below.

Process Step	Number of Machines	Seconds per Bottle
Bottling	1	1
Applying a lid	1	3
Labeling	2	5
Packaging	1	4

1. What is the process capacity (bottles/hour) for the manufacturingline?  代写运营管理作业

2.What is the bottleneck in theprocess?

4. Ifone more identical labeling machine is added to the process, how much is the increase in the process capacity going to be (in terms of bottles/hour)?
5. What is the utilization of the packaging machine if the demand rate is 60 boxes/hour? Recall that a box consists of 10 bottles.

Question 2. Fuel Economy 

In response to a recent fuel economy bill passed by the U.S. Senate raising the average fleet-wide gas mileage to 35 miles per gallon by the year 2020, Victor Puente, the chief operating officer of an up-and-coming auto-maker was put in charge to evaluate the quality output of a flexible engine assembly line. The production process was subject to several modifications after a number of changes were made to existing engine designs in order to increase fuel efficiency. Victor currently has a team of 6-s specialists (called black belts) in the organization to help him carry out this task. You are the master black belt reporting directly to Victor. After carefully designing the rational sub-groups in a test, you have received the gas mileage ratings of 15 engine groups, each of size 5, for analysis. The numbers are summarized in the table below:  代写运营管理作业

Group	X1	X2	X3	X4	X5	X	S
1	34.8	35.268	35.305	34.569	35.418	35.072	0.367
2	34.502	35.204	35.283	35.186	35.035	35.042	0.315
3	34.91	35.067	35.318	35.062	35.026	35.0766	0.149
4	35.068	35.089	34.849	35.102	35.055	35.0326	0.104
5	34.709	34.648	34.596	34.856	34.668	34.6954	0.099
6	34.651	34.563	35.011	35.204	35.058	34.8974	0.276
7	34.86	35.244	34.948	34.783	35.214	35.0098	0.209
8	34.825	35.458	34.982	34.956	35.079	35.06	0.24
9	34.961	34.809	35.143	34.558	34.573	34.8088	0.252
10	34.647	35.167	35.007	34.847	34.878	34.9092	0.193
11	35.289	34.602	34.583	34.972	34.671	34.8234	0.304
12	34.797	34.917	35.145	35.202	34.848	34.9818	0.181
13	35.312	35.155	35.035	34.879	35.077	35.0916	0.159
14	35.363	35.333	34.791	35.256	35.488	35.2462	0.268
15	35.072	34.53	35.382	34.953	34.77	34.9414	0.32
					Average	34.979	0.229

1.Construct an X-chart to deduce whether the process is in control.

2.Theengineering team has issued the specification limits of the high efficiency engines to be between 34.5 mpg and 35.5 mpg. Using the already obtained sample from the assembly line, can you report to Victor whether the process is capable? What is its capability index C_p?

Question 3. Valley Forge Income Tax Advice  代写运营管理作业

VF is a small accounting firm supporting wealthy individuals in their preparation of annual income tax statements. Every December, VF sends out a short survey to their customers, asking for the information required for preparing the tax statements. Based on 24 years of experience, VF categorize their cases into the following groups:

• Group 1(New customers, easy): 15 percent ofcases
• Group2(New customers, complex): 5 percent of cases
• Group 3(Repeat customers, easy): 50 percent ofcases
• Group 4(Repeat customers, complex): 30 percent ofcases

Here, easy versus complex refers to the complexity of the customer’s earning situation.  代写运营管理作业

In order to prepare the income tax statement, VF needs to complete the following set of activities. Activity times ( and even which activities need to be carried out) depend on which group a tax statement falls into. All of the following activity times are expressed in minutes per income tax statement.

Group	Filing	Initial Meeting	Preparation	Review by Senior Accountant	Writing
1	20	30	120	20	50
2	40	90	300	60	80
3	20	No Meeting	80	5	30
4	40	No Meeting	200	30	60

The activities are carried out by the following three persons:

• Administrative support person: filing andwriting
• Senior accountant(who is also the owner): initial meeting, review by the senioraccountant
• Junior accountant:

Assume that all three persons work eight hours per day and 20 days a month. For the following questions, assume the product mix as described above. Assume that there are 50 income tax statements arriving each month.

Activity	Formula	Average Processing Time
Filing	20×0.15+40×0.05+20×0.5+40×0.3	27
Initial Meeting	30×0.15+90×0.05+0×0.5+0×0.3	9  代写运营管理作业
Preparation	120×0.15+300×0.05+80×0.5+200×0.3	133
Review	20×0.15+60×0.05+5×0.5+30×0.3	17.5
Writing	50×0.15+80×0.05+30×0.5+60×0.3	44.5

Now, we calculate the average processing time for each employee by  adding up the average time they spend  on each activity. Using the average processing times, we calculate the processing capacity of each employee.  代写运营管理作业

Worker	Avg. Proc. Time (min)	Capacity (min/month)	Proc.  Cap. (jobs/month)
Admin Staff	27+44.5=71.5	8 × 20 × 60 = 9600	9600/71.5=134.3
Junior Accountant	133	8 × 20 × 60 = 9600	9600/133=72.2
Senior Accountant	9+17.5=26.5	8 × 20 × 60 = 9600	9600/26.5=362.3

Next, we calculate the utilization of each employee.

Since the capacity of each employee is represented as the total time they have available each month, we express demand as the monthly average time demanded from each employee.

Worker	Proc. Time (min/job)	Capacity (min/month)	Demand (min/month)	Utilization 代写运营管理作业
Admin Staff	71.5	9600	71.5×50=3575	3575/9600=0.372
Junior Accountant	133	9600	133×50=6650	6650/9600=0.693
Senior Accountant	26.5	9600	26.5×50=1325	1325/9600=0.138

Now we are ready to answer the sub-questions.

1.Which of the three persons is thebottleneck?  代写运营管理作业

2. What is the utilization of the senior accountant? The junior account? The administrative support person?

3. Youhave been asked to analyze which of the four product groups is the most  Which factors would influence the answer to this?
4. Howwould the process capacity of VF change if a new word processing system would reduce the time to write the income tax statements by 50 percent?

 

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