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UNIT II
MAKE OR BUY DECISION
By
Dr. A. Asha
Professor/Mechanical Engineering
Kamaraj College of Engineering & Technology
Virudhunagar
February 2017
MAKE OR BUY DECISION
•It is the determination whether to produce a
component internally or to buy it from the
outside supplier
•The decision is based on the cost.
•The cost for both the alternatives should be
calculated and the alternative with less cost is to
be chosen
CRITERIA FOR MAKE
• The product can be made cheaper by the firm.
• The finished product is being manufactured only by
limited firms
• The part needs extremely close quality control
• The part can be manufactured from the existing
facilities with experienced operators
CRITERIA FOR BUY
• High investments required for making
• Does not have facilities for making.
• Skilled workers not available
• Demand is either temporary or seasonal
• Patents or legal formalities prevent from making the
product.
APPROACHES FOR MAKE OR BUY
DECISION
•The following are the approaches
(1) Simple cost analysis
(2) Economic analysis
(3) Break Even Analysis
SIMPLE COST ANALYSIS
•It is concerned with finding the actual
expenditure incurred on a given
product.
•Finding the total value of economic
resources used to produce a product
EXAMPLE
• A company has been buying a part of machinery for
Rs.1000/- each. It has an extra capacity that can be used to
produce the same. The annual fixed cost of the unused
capacity is Rs.10,00,000/-. If the company decided to make
the product it will incur material cost of Rs.350/- per unit,
labour cost of Rs 300 per unit and variable overhead cost of
Rs 100/- per unit. The future demand is estimated as 5000
units. Which decision is profitable for the company.
SOLUTION
• Given data :
1. Fixed cost : Rs. 10,00,000
2. Labour cost : Rs. 300/unit
3. Material cost : Rs. 350/unit
4. Overhead cost : Rs 100/unit
5. Demand : 5000 units
6. Buying price : Rs. 1000 each
SOLUTION
Cost of making
• Total Cost = FC + VC
• FC = Rs.10,00,000
• VC/unit = material cost + Labour cost + Overhead cost
=300 + 350 + 100
= Rs. 750/unit
• Demand = 5000 units
• Total Variable cost = 5000 × 750 = Rs. 37,50,000/-
• Total cost = FC + VC = 10,00,000 + 37,50,000 = Rs.47,50,000/-
Cost of buying :
• TC = FC + Buying cost = 10,00,000 + (5000 × 1000) = Rs. 60,00,000/-
Decision : Since the cost of making is < cost of buying it is decided to make
the product
ECONOMIC ANALYSIS
• The following models are used
(a) Purchase model
(b) Manufacturing model
PROBLEM
• A part of the machine has a yearly demand of 3000 units. The
different costs in respect of make or buy are as given below
Details Buy Make
Item cost/unit Rs.10 Rs.8.0
Procurement cost/order Rs.150 -
Setup cost/setup Rs.80/-
Annual carrying cost/year Rs.2.0 Rs.1.50/-
Production rate/year - 10,000 units
SOLUTION
Purchase Model
D = 3000 Units/Year
C0 = Rs.150/order
Cc = Rs.2.0/item/year
P = Rs. 10/unit
Q1 = √
2𝐶 𝑜 𝐷
𝐶 𝐶
= 670.82 units
TC = 3000 x 10 + 3000 x 150/670.82 + 670.82 x2/2 = Rs. 31,341.64
BREAK EVEN ANALYSIS
• Break even analysis implies at a particular point the
total revenue = total cost.
• A manufacturer of TV buys TV cabinet at Rs 500 each. In case the
company makes it within the factory the fixed and variable costs
would be Rs.4,00,000 and Rs 300 per cabinet respectively. Should the
manufacturer make or buy the cabinet if the demand is 1500 TV
cabinet
SOLUTION
•Selling price / unit = Rs. 500/-
•Variable cost / unit = Rs. 300/-
•Fixed cost = Rs. 4,00,000
•BEP = 4,00,000/(500-300) = 2,000 units
Decision : Since the demand is < the BEP the
company should buy
SOLUTION
• Manufacturing Model
Q2 = √
2𝐶 𝑜 𝑟
𝐶 𝑐[1−
𝑟
𝑘
]
= 676.12
TC = 3000 x 8 + 3000 x 80/676.12 + 1.5(10,000-3000)676.12/2
x 10000
= Rs. 24,709.93
Decision : Since the cost of making the item is < the cost of
Producing it is decided to make the product

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MG 6863 UNIT II MAKE OR BUY DECISION

  • 1. UNIT II MAKE OR BUY DECISION By Dr. A. Asha Professor/Mechanical Engineering Kamaraj College of Engineering & Technology Virudhunagar February 2017
  • 2. MAKE OR BUY DECISION •It is the determination whether to produce a component internally or to buy it from the outside supplier •The decision is based on the cost. •The cost for both the alternatives should be calculated and the alternative with less cost is to be chosen
  • 3. CRITERIA FOR MAKE • The product can be made cheaper by the firm. • The finished product is being manufactured only by limited firms • The part needs extremely close quality control • The part can be manufactured from the existing facilities with experienced operators
  • 4. CRITERIA FOR BUY • High investments required for making • Does not have facilities for making. • Skilled workers not available • Demand is either temporary or seasonal • Patents or legal formalities prevent from making the product.
  • 5. APPROACHES FOR MAKE OR BUY DECISION •The following are the approaches (1) Simple cost analysis (2) Economic analysis (3) Break Even Analysis
  • 6. SIMPLE COST ANALYSIS •It is concerned with finding the actual expenditure incurred on a given product. •Finding the total value of economic resources used to produce a product
  • 7. EXAMPLE • A company has been buying a part of machinery for Rs.1000/- each. It has an extra capacity that can be used to produce the same. The annual fixed cost of the unused capacity is Rs.10,00,000/-. If the company decided to make the product it will incur material cost of Rs.350/- per unit, labour cost of Rs 300 per unit and variable overhead cost of Rs 100/- per unit. The future demand is estimated as 5000 units. Which decision is profitable for the company.
  • 8. SOLUTION • Given data : 1. Fixed cost : Rs. 10,00,000 2. Labour cost : Rs. 300/unit 3. Material cost : Rs. 350/unit 4. Overhead cost : Rs 100/unit 5. Demand : 5000 units 6. Buying price : Rs. 1000 each
  • 9. SOLUTION Cost of making • Total Cost = FC + VC • FC = Rs.10,00,000 • VC/unit = material cost + Labour cost + Overhead cost =300 + 350 + 100 = Rs. 750/unit • Demand = 5000 units • Total Variable cost = 5000 × 750 = Rs. 37,50,000/- • Total cost = FC + VC = 10,00,000 + 37,50,000 = Rs.47,50,000/- Cost of buying : • TC = FC + Buying cost = 10,00,000 + (5000 × 1000) = Rs. 60,00,000/- Decision : Since the cost of making is < cost of buying it is decided to make the product
  • 10. ECONOMIC ANALYSIS • The following models are used (a) Purchase model (b) Manufacturing model
  • 11. PROBLEM • A part of the machine has a yearly demand of 3000 units. The different costs in respect of make or buy are as given below Details Buy Make Item cost/unit Rs.10 Rs.8.0 Procurement cost/order Rs.150 - Setup cost/setup Rs.80/- Annual carrying cost/year Rs.2.0 Rs.1.50/- Production rate/year - 10,000 units
  • 12. SOLUTION Purchase Model D = 3000 Units/Year C0 = Rs.150/order Cc = Rs.2.0/item/year P = Rs. 10/unit Q1 = √ 2𝐶 𝑜 𝐷 𝐶 𝐶 = 670.82 units TC = 3000 x 10 + 3000 x 150/670.82 + 670.82 x2/2 = Rs. 31,341.64
  • 13. BREAK EVEN ANALYSIS • Break even analysis implies at a particular point the total revenue = total cost. • A manufacturer of TV buys TV cabinet at Rs 500 each. In case the company makes it within the factory the fixed and variable costs would be Rs.4,00,000 and Rs 300 per cabinet respectively. Should the manufacturer make or buy the cabinet if the demand is 1500 TV cabinet
  • 14. SOLUTION •Selling price / unit = Rs. 500/- •Variable cost / unit = Rs. 300/- •Fixed cost = Rs. 4,00,000 •BEP = 4,00,000/(500-300) = 2,000 units Decision : Since the demand is < the BEP the company should buy
  • 15. SOLUTION • Manufacturing Model Q2 = √ 2𝐶 𝑜 𝑟 𝐶 𝑐[1− 𝑟 𝑘 ] = 676.12 TC = 3000 x 8 + 3000 x 80/676.12 + 1.5(10,000-3000)676.12/2 x 10000 = Rs. 24,709.93 Decision : Since the cost of making the item is < the cost of Producing it is decided to make the product