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Operations management- what is it?
a field of management that specialises in the production of goods and services and uses special tools and techniques for solving manufacturing problems
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Product design
DMFA
Four objectives of product design +1
- Design for manufacturability and assembly
- 1. Producibility - degree to which a product or service can actually be produced within existing capacity
- 2. Cost - sum of materials, labour, design, transportation and overhead expense associated with product and service
- 3. Quality - excellence of product/service- the serviceability and value that customers gain by purchasing a product.
- 4. Reliability - degree to which customer can count product/service to fulfil intended purpose
- Also: Timing
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Most common approach to location slection
- Cost - benefit analysis
- Benefits and costs are analysed and best option is selected with highest ratio
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Four most common types of facilities layout + 3 others
- Process Layout
- Product Layout
- Cellular Layout (both process and product)
- Fixed Position Layout
office layout, warehouse and storage layout and retail layout
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Process layout
- Equipment that performs a similar process are grouped together
- Suitable for LOW volume and HIGH variety products
- Drawback- a complex product may need several different processes performed on it
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Product Layout
- Machines and tasks are arranged according to progressive steps in producing a single product
- Assumes high volume production and high demand
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Cellular Layout
Advantages?
- Machines dedicated to sequences of operations are grouped into cells
- Advantages:
- Provides efficiencies of both product and processes layout
- Workers can work in clusters that facilitate teamwork and joint problem solving
- Staffing flexibility- one person can operate all machines and walking distance is small
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Fixed Position Layout
A/D
- Product remains in one location and tasks and equipment are brought to it
- Advantage: Used for large or special products e.g aircraft
- Disadvanatage
- Not suitable for high volume but necessary for large bulky products
- Limited space
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Supply chain management
managing the sequence of supplies and purchasers, covering all stages of processing from obtaining raw materials to distributing finished goods to final customers
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Supply Chain Management
Arm's length approach
Organisation spreads purchases among many suppliers encouraging them to compete to provide the best quality at the lower prices
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Supply Chain Managment
Partnering
Cultivating relationships with selected suppliers to meet unique needs.
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Logistics and Distribution Management
- Efficient integration of material acquisition, movement and storage activities.
- Some organisations use contract logistics firms such as Linfox.
- Some companies share transportation information and resources with other companies so they share truckspace and avoid waste of resources to save money
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Supply chain management strategies
- Many Suppliers
- Few Suppliers
- Vertical integration
- Kiretsu
- Partnering
- Arm's length approach
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Inventory: Pressures to reduce inventory (4)
- Interest or opportunity cost: Firms may borrow or not undertake another investment in order to purchase inventoryStorage and handling cost: Inventory takes up space and must be moved in and out of storage
- Insurance: Higher levels of stock incur higher insurance costs
- Reduction in value: Obsolescence and deterioration may reduce value of stock and theft could occur.
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Types of Inventory (4)
- Raw materials
- Work in progress
- Maintenance
- Finished Goods
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Pressures to increase inventory (5)
- 1. Customer service: speedy delivery avoid stock outs
- 2. Administration costs: reduced paper work, negotiation time
- 3. Labour and equipment utilisation: 'economies of scale,' stabilises output when demand is seasonal
- 4. Transportation costs: Handling and mileage
- 5. Payments to suppliers: Incentives, preferential treatment
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Vertical integration
- Ability to produce goods/services previously purchased or actually buying supplier or distributor
- Can forward or backward integrate
- can yield cost reduction and timely delivery
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Ways quality improves profitability
Sales gains
Reduced Costs
- Sales gains:
- Improved response
- Higher prices
- Improved reputation
- Reduced Costs:
- Increased productivity
- Lower rework and scrap
- Lower warranty costs
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Customer driven definitions of quality (5)
- 1. Conformance to specifications
- 2. Value
- 3. Fitness for use
- 4. Support
- 5. Psychosocial impressions
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Techniques for inventory accuracy and control (3)
- 1. Good personnel selection and training
- 2. Tight control of incoming shipments
- 3. Effective control of all goods leaving facility
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