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Question 1: Demand Management The table below shows the expenses for a lawn-mowing business for the last three years. (a) Calculate the seasonal index for each month to 4 decimal places using the monthly averages and the average for all months. (b) Calculate the deseasonalised expense forecast for year 4 to 4 decimal places using the linear trend equation ŷ = 232.68 + 1.7395 x where x is the sequential month number starting with x = 1 for July in Year 1, x = 13 for July in Year 2 and so on. (c) Calculate the seasonalised expense forecast for year 4 to 0 decimal places using the deseasonalised forecast and the seasonal indices. Question 2: Capacity Planning A manufacturer produces a product with a six month demand cycle as shown in the following table. Each unit requires 40 labour hours to produce. There are currently 6 workers employed and these are all available for work. Each of the 6 workers has a workforce labour cost of $30 per hour in regular time. The production strategy is to produce with a (minimal) constant workforce of six workers on regular time and subcontract to meet additional requirements. When subcontractors are used to meet the additional requirements, the subcontract cost is $50 per hour. Calculate the total cost of this plan by calculating the workforce regular time cost and the subcontract cost by month and in total. Question 3 Operations Strategy ( “The customer wants quality, flexibility and service to increase while variability, lead time and costs to decrease.” Briefly discuss the customer and the wants of the customer. Question 4: Process Design (16 marks) (a) The service-profit chain has six links that drive the next stage. Name those six linkages (b) Discuss the linkage between customer and supplier in the service-profit chain. (c) Assuming that the service-profit chain is valid, discuss the fallacy of concentrating management effort on profit and revenue growth. Question 5: Process Improvement and Lean thinking In class, we discussed the process improvement that was achieved at New Zealand Sugar Company on the North Shore. The discussion identified several of the classic wastes associated with lean thinking and parts of their production process that were improved. These wastes and process improvements are called aspects. Briefly describe four aspects of their process improvement. You should name the aspect (1 mark), describe how it was achieved (1 mark) and outline the benefits achieved (1 mark). (a) Name the aspect … Describe how it was achieved … Outline the benefits achieved … (b) Name the aspect … Describe how it was achieved … Outline the benefits achieved … (c) Name the aspect … Describe how it was achieved … Outline the benefits achieved … (d) Name the aspect … Describe how it was achieved … Outline the benefits achieved …

Question 1: Demand Management

The table below shows the expenses for a lawn-mowing business for the last three years.

(a) Calculate the seasonal index for each month to 4 decimal places using the monthly averages and the average for all months.

(b) Calculate the deseasonalised expense forecast for year 4 to 4 decimal places using the linear trend equation ŷ = 232.68 + 1.7395 x where x is the sequential month number starting with x = 1 for July in Year 1, x = 13 for July in Year 2 and so on.

(c) Calculate the seasonalised expense forecast for year 4 to 0 decimal places using the deseasonalised forecast and the seasonal indices.

 

 

 

 

 

Question 2: Capacity Planning

A manufacturer produces a product with a six month demand cycle as shown in the following table.

Each unit requires 40 labour hours to produce.

There are currently 6 workers employed and these are all available for work. Each of the 6 workers has a workforce labour cost of $30 per hour in regular time.

The production strategy is to produce with a (minimal) constant workforce of six workers on regular time and subcontract to meet additional requirements.

When subcontractors are used to meet the additional requirements, the subcontract cost is $50 per hour.

Calculate the total cost of this plan by calculating the workforce regular time cost and the subcontract cost by month and in total.

 

 

 

Question 3 Operations Strategy (

“The customer wants quality, flexibility and service to increase while variability, lead time and costs to decrease.” Briefly discuss the customer and the wants of the customer.

 

Question 4: Process Design (16 marks)

(a) The service-profit chain has six links that drive the next stage. Name those six linkages

 

(b) Discuss the linkage between customer and supplier in the service-profit chain.

 

(c) Assuming that the service-profit chain is valid, discuss the fallacy of concentrating management effort on profit and revenue growth.

 

 

Question 5: Process Improvement and Lean thinking

In class, we discussed the process improvement that was achieved at New Zealand Sugar Company on the North Shore. The discussion identified several of the classic wastes associated with lean thinking and parts of their production process that were improved. These wastes and process improvements are called aspects. Briefly describe four aspects of their process improvement. You should name the aspect (1 mark), describe how it was achieved (1 mark) and outline the benefits achieved (1 mark).

(a) Name the aspect …

Describe how it was achieved …

 

Outline the benefits achieved …

 

(b) Name the aspect …

Describe how it was achieved …

 

Outline the benefits achieved …

(c) Name the aspect …

Describe how it was achieved …

 

Outline the benefits achieved …

(d) Name the aspect …

Describe how it was achieved …

 

Outline the benefits achieved …

 

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