unit 5 - chapter 1 Flashcards
what are the main decisions operations managers usually make?
these relate to
- processes by which goods and services are produced . quality of goods or services
- quantity of goods or services (the capacity of operations) . stock of materials (inventory) needed to produce goods or services
- management of human resources involved with operations activities
what is the transformation model?
From a system perspective, business operations can be seen as a productive system whose processes transform specific resources (inputs) into finished goods or services (outputs) required by customers. This basic transformation model applies equally in manufacturing and service organisations, and in both the private and the not-for-profit sectors.
what are the transformed resources?
Materials –
- some operations transform the physical properties of materials (clay for brick-making or food in a restaurant)
- Other operations transform the location of materials (parcels and mail in the postal services)
- Others transform the possession of the materials (retail operations)
- Others, such as warehouses, just store materials
Information –
- some operations transform the form of the information (e.g., consultants, accountants),
- others sell information (e.g., market research companies),
- others transport information (e.g., telecommunications companies)
- others store information (e.g., libraries). .
Customers
- some operations transform customers physically (e.g., hairdressing, hospitals, dentists)
- some transform the psychological state of customers (e.g., entertainment companies)
- some transport customers (e.g., airline companies)
- others accommodate customers (e.g., hotels).
what are transforming resources?
resources necessary to act upon the transformed resources to carry out the transformation, but they do not themselves form part of the output. These can be:
- Facilities or fixed assets – the buildings, machinery, plant and process technologies of the operation
- Staff – the people involved in the operation, at any level. They are usually referred to as human resources and they are the employees of the organisation carrying out the operations. These are the people who plan, control, operate or maintain the operation.
what are transformation processes?
- changes in the physical characteristics of materials or customers (e.g., food processing, a hair cut)
- changes in the location of materials, information or customers (e.g., cargo freight, telecommunications, public transport)
- changes in the ownership of materials or information (e.g., retail, market data)
- storage or accommodation of materials, information or customers (e.g., warehousing, information backup storage, a bed and breakfast hotel)
- changes in the purpose or form of information (e.g., information processing)
what are outputs?
goods and services (many operations produce both)
- Goods are tangible, physical products of the process; they are typically produced prior to the customer receiving them.
- Services are intangible - we cannot touch or store a service, they are consumed at the time of production.
what issues are there around undesirable outputs?
- waste elements generated in the production process. . minimising the environmental impact caused by waste outputs
- preserving the health and safety of employees and local community
- responsible for ethical behaviour in relation to the social impact of transformation processes, both locally and globally. (eg manufacturers of sports footwear have come under fire for employing child labour and paying low wages to workers employed in their overseas factories.)
what is feedback information used for?
used to control the operations system by adjusting the inputs and transformation processes that are used to achieve desired outputs.
For example, a chef relies on a flow of information from the customer, through the waiter, about the quality of the food. Adverse feedback might lead the chef to change the inputs (e.g., by buying better quality potatoes) or the transformation process (such as changing the recipe or the cooking method).
what is the four stage Chase and Hayes model?
- stage 1: Internally neutral Objective is to minimise the negative impact of ‘operations’
- Stage 2 Externally neutral Objective is for ‘operations’ to help the business maintain parity with its competitors ternally supportive
- stage 3 - internally supportive - Objective is for ‘operations’ to provide credible support for the business strategy
- Stage 4 Externally supportive Objective is for ‘operations’ to provide a source of competitive advantage
what are the five key strategic performance objectives of operations?
- Quality Being RIGHT
- Speed Being FAST
- Dependability Being ON TIME
- Flexibility Being ABLE TO CHANGE
- Cost Being COST EFFECTIVE
what specific issues are there with regard to quality?
- doing things right
- consistently producing goods and services that meet customers’ expectations
- can be achieved by the provision of error-free products that fulfil customer requirements
- requires a skilled workforce, adequate job specifications, proper technologies and effective communication. For example, the quality of a bus company can mean that staff are courteous and helpful, the drivers drive safely, the buses are clean and quiet and the timetable is easy to read.
what specific issues are there with regard to speed?
- doing things quickly
- delivering goods and services to customers as fast as possible
- involves making quick decisions and rapidly moving materials and information inside the operations
- broadcasting companies want to be the first to broadcast breaking news.
- Speed is also essential for emergency services, matter of life or death
what specific issues are there with regard to dependability?
- doing things on time and keeping the delivery promises made to customers
- developing trustworthiness
- can be achieved through the use of reliable equipment, effective communication, efficient scheduling systems, a motivated workforce, etc.
- Supermarket: reasonable queuing times, constant availability of parking, keeping the proportion of goods out of stock to a minimum, etc
what specific issues are there with regard to flexibility?
- being able to change the operation to fulfil new customer requirements
- different customers have different requirements and these can change over time
- organisations need to be able to introduce new or modified goods and services (goods/ service flexibility), as well as to produce a wide range or mix of goods and services (mix flexibility).
- volume flexibility – ability to change volume of output over time
- delivery flexibility – the ability to change delivery time. can be achieved by the use of more versatile equipment, suppliers with good flexibility performance, a multi-skilled workforce, etc.
- retailer with the ability to introduce new goods or promotions and the ability to provide a wide range of goods
what specific issues are there with regard to cost?
- doing things economically.
- Low cost is a universally attractive objective (Slack et al., 2007).
- Usually, operations spend money on staff, materials, facilities, equipment and technology.
- Cost reduction can be achieved by developing good relationships with suppliers, by good negotiation of supplying contracts, by getting the right mix of resources and facilities as inputs, etc. (ALDI)
ALDI case study (cost)
- international supermarket specialising in ‘private-label’, mainly food products.
- operations are deliberately simple, using basic facilities to keep down overhead costs.
- Most stores stock only a limited range of goods.
- ‘private-label’ approach means that the products have been produced according to Aldi’s quality specifications and are sold only in Aldi stores.
- no need for high costs of brand marketing and advertising, and with Aldi’s formidable purchasing power, prices can be 30 per cent below their branded equivalents.
- open-carton displays, which eliminate the need for special shelving,
- no provision of grocery bags
- ‘trolley rental’ system, which requires customers to return the trolley to the store to get their coin deposit back.
How do volume and variety influence the design of a process?
How much will the process need to produce?
-
volume of the output can range from
- very few – even a single output (e.g., a new bridge or ship from a construction project)
- to very many (motor cars or take-away hamburgers)
-
variety of the output will also range from
- very low (each unit is exactly like every other one - fast food etc)
- to very high (high-fashion clothing, consultations with medical specialists or the food in five-star restaurants.
what are the five generic process types?
- projects,
- jobbing,
- batch production,
- mass production
- continuous production
what is involved in the following process type: projects
- typically produce one finished output at a time to customer requirements.
- generally take a long time to complete and involve large capital and labour investments relative to the size of the operation.
- construction and civil engineering, aeroplanes and ships
- complex and uncertain,
- high risk of failure or cost and time overruns (especially projects involcing untried technologies or novel situations - IT, constructions)
what is involved in the following process type: jobbing
- outputs vary, volume is higher than in project operations. process many different jobs to specific customer requirements
- work is intermittent rather than continuous.
- Each customer job is processed individually and may require many different work activities before work is complete
- custom print shop; an example of a job would be designing and printing a letterhead for a personal or business customer.
what is involved in the following process type: batch production
- When the volume of output is higher, and more outputs are identical
- many different outputs are processed at the same time, in groups or batches
- most common process type for repetitive operations
- commercial bakery
- operate at higher volumes than jobbing operations
- outputs are often not produced for an individual customer
- applied in service as well as manufacturing contexts
- class of students could be considered as being a batch that is being acted on by the teacher
- administrator sending out a standard letter to a large number of people (‘mail merge’)
what is involved in the following process type: mass production
- large volumes of standardised products are made for a mass market
- appropriate for markets that demand high volumes of a similar output
- goods include cars, personal computers and many household products
- use ways of linking the different stages of the process, such as assembly lines
- example - customer billing operations
what is involved in the following process type: continuous production
- highly standardised products
- system is highly automated
- runs with only intermittent stops (often 24 hours a day, 365 days a year)
- outputs are difficult to separate physically
- processing industries such as petrochemicals and foodstuffs.
how do you choose a process type?
types lie along a diagonal that ranges from low-volume/high-customisation to high-volume/high-standardisation. process type for any good or service must be consistent with the volume and variety of the output.
best process strategy is found on the diagonal; strategies that are not on the diagonal generally have either over-invested in the process or provided too much/not enough flexibility
As volume increases, it becomes more difficult to customise outputs to individual customer requirements (taxi (low volume of customers but high variety of delivery), vs. bus (high volume of customers and low variety of delivery).
what are the service process types?
Schmenner (1986): classified by the degree of customisation and labour intensity (instead of volume).
- professional service
- service shop
- mass service
- service factory
what is involved in the following process type: professional service
- provided by highly trained specialists, such as medical doctors or lawyers.
- tailored to each client or customer
- very labour intensive.
what is involved in the following process type: service shop
- provided by trained specialists,
- with less customisation and less labour intensity
- examples:universities and travel shops, where each individual is treated slightly differently but the range of services is much more standardised.
what is involved in the following process type: mass service
- same basic service to every customer (banks or supermarkets)
- much less interaction with the service provider.
what is involved in the following process type: service factory
- very little customisation (public transport)
- individual client or customer has very little interaction with the service provider.
what is the Western approach to process design?
- relay race; sequential approach
- Responsibility for the project passes from department to department in turn like a baton – from research and development people who design the product, to operations people who produce it, to sales who sell it.
- problems - each department concentrates on its own priorities which can lead to:
- products being designed without regard to how they will be manufactured
- technological overkill (designers seek perfectionist solutions no regard for cost or the performance)
- time lost in seeking solutions to problems originating from earlier stages in the process,
- Further costs and delays accumulate as people seek to place the blame on other departments.
what is the Japanese approach to process design?
- a football team where the ball – the project – is interchanged between team members to make best use of their skills at the appropriate times.
- A project team is made up of players from research and development, operations and sales.
- Departmental barriers are removed
- players from the different departments can ensure that others are aware of relevant issues (sales people ensuring a customer focus, operations ensuring manufacturability in design, etc.).
- When well managed, this concurrent approach – often termed ‘simultaneous engineering’ – offers faster and better new product design and development.
what are two main elements of the process to be designed?
- layout - the arrangement of physical facilities for producing goods and services,
- flow describes how materials, information or customers move through the operations system.
what are the 4 layout types?
- Fixed layout
- Process layout
- Cell layout
- Product layout
can you provide an overview of fixed layout?
Operation takes place in one position, where all necessary resources are located, including staff and equipment
- High flexibility
- High variety of tasks for staff
- Little disturbance for the product or customers
- Likely to incur high unit costs
- Difficult to schedule
- Involves lots of movement of staff and equipment
examples:
- Construction projects, e.g., motorways and bridges
- Large manufactured items, e.g., oil tankers and aeroplanes
- Entertainment, catering and other activities associated with special events, e.g., weddings,country fairs or music festivals
can you provide an overview of process layout?
- Equipment and operators are arranged according to common processes; work travels between them
- High flexibility
- Varied and hence more interesting work for operators
- Not easily disrupted
- Often hard to control
- Associated with low utilisation and high work-in-progress (leading to high material stock costs in manufacturing and unhappy customers in services)
- A school where students travel between classrooms, the library and other facilities
can you provide an overview of cell layout?
- Resources (e.g., equipment and operators) for each particular type of product are grouped together in cells
- Offers a good tradeoff between cost and flexibility
- Can be used to achieve high throughput, as well as providing more interesting work for operators
- Can be costly to initiate
- Needs higher investment in equipment
- Offers minimal inventory levels within its operations
- High stocks of the cell’s raw materials and finished goods if its input and output aren’t coordinated with other operations
- Many automated factories use the cell layout, as do some cafeterias
can you provide an overview of product layout?
- Equipment and operators are arranged in order of the stages of the process and the product travels between them
- Offers lowest unit cost for high volume
- Facilitates the use of specialised equipment, with correspondingly specialist jobs designed to minimise movements
- Not very flexible
- Very repetitive jobs; workers can be bored and frustrated
- In manufacturing, work-in-progress inventory is minimised, but needs a continuous supply of raw material (from a high level of input material or frequent deliveries from suppliers) or the line will quickly halt
- car assembly plant; arrivals facilities at airports
how do you choose appropriate layout?
Decisions about layout and flow will affect performance through their impact on:
- cost and flexibility of the process
- time and distance that materials or customers travel in the process
- flow of materials, information and customers through the operation
what are the two different ways of organising the flow of materials, information or customers through the operations process
‘process-focused operations’,
- emphasis is on the flexibility of the process in order to produce customised goods or services for customers (supermarket - customers can map their own path through the system to minimise time spent in unnecessary activities and focus on the areas that they wish to visit)
- flow is ‘jumbled’ – the materials, information or customers being transformed can take many different paths between activities
product-focused operations
- emphasis is on standardising the process in order to produce standardised outputs at the lowest possible cost
- single predetermined route through the factory, mass immunisation,
- line flows- only a single path between activities for materials, information or customers
what is process technology?
equipment, machine, device or system that helps the creation and/or delivery of goods and services (Slack et al., 2007).
what is direct process technology?
Some process technologies contribute directly to the production and delivery of goods and services (Harrison, 1996).
For example, a coating machine that uses a precise amount of chocolate to make a chocolate bar is contributing directly to the production of the final product.
what is indirect process technology?
- technologies that assist in the production process rather than contribute directly to the creation and delivery of goods and services
- peripheral to the actual creation of goods and services, plays an important role in facilitating and supporting the infrastructure for those processes that directly contribute to their creation and delivery (Slack and Lewis, 2002).
- Examples include computer systems which run stock control systems and can be used to help managers control and improve the operations
what are materials-processing technologies?
process one or more types of material such as chemicals, fabric, metals, plastics, etc.
operations activities involve
- material transformation (transformation of raw materials into finished goods),
- material movement (movement of materials from one place to another) and/or material storage (automated storage, location and retrieval of stored items).
- more commonly used in manufacturing than in services.
what are examples of classic materials-processing technologies?
- Robots – machines or devices that can be programmed to perform a variety of tasks. In operations, they are used mainly for moving and manipulating materials.
- suitable performing repetitive tasks, such as paint spraying, loading and unloading, welding, etc. for long periods.
- in the car industry, programmed once and then repeat the same task for years. cannot perform tasks that require sophisticated judgement and sensory feedback, especially useful in reaching places that are difficult for humans to reach or for handling hazardous substances, such as hot steel ingots, explosives or radioactive materials.
what is flexible manufacturing system?
- where separate machines or devices are under the control of a central computer that coordinates the operations and finds the best timetables for specific tasks (Waters, 2002).
- The central computer also controls the movement of materials between machines.
- Once an FMS is programmed, the system can work with very little human intervention.
advantages .
- can work continuously and consistently, allowing high scale and quality
- allows high flexibility in managing manufacturing resources, such as time and effort
- The high utilisation of resources allows low operating costs.
disadvantages .
- expensive to buy and set up
- needs programming skills
- designed to match current production
- major product changes might cause problems
what are information-processing technologies?
the use of computers and devices (hardware) as well as computer programs or applications (software) that are combined together to form information systems that can securely process information the internet electronic business
what are customer-processing technologies?
main type of technology used by many service firms.
- directly operated by the customers (direct booking of theatre tickets, in-flight entertainment)
- those operated by an intermediary (booking agent)
how are technology choices made?
- market requirement evaluation, which takes into account the importance of satisfying customer needs .
- operations resource evaluation, which focuses on building operations capabilities
- financial evaluation, which assesses the financial value of the investment on technology.
what is involved in market requirement evaluation?
- evaluating the potential impact of a process technology on the operations’ ability to fulfil customer needs.
- assess how a specific technology would affect the performance of the operations in terms of quality, speed, dependability, flexibility and cost. (warehouse example )