Production Flashcards
Define Batch Production
A certain amount of a product is made and then production changes to make another.
Advantages of Batch Production
- produce multiple types of a product
- can use trends
- less likely to have excess supply
Disadvantages of Batch Production
- lots of downtime
- batch size is capacity allocated
Define Mass Production
A continuous flow of producing.
Advantages of Mass Production
- constantly producing products
- benefit from EOS
Disadvantages of Mass Production
- can’t change the product
- employees become demotivated due to boredom
- high set up costs
Define Job Production
Products made to fit customer requests/wants.
Advantages of Job Production
- high pricing so high potential profits
- repeat custom
- USP
- less labour
Disadvantages of Job Production
- highly skilled workers
- so potentially higher costs
- less custom due to high prices
- cash flow could be a problem (need deposits)
Define Process Production
Involves a series of processes which raw materials go through, the end result being a large quantity of finished product.
Advantages of Process Production
- automated production so reduces unit cost
- large quantities produced
- consistent quality
Disadvantages of Process Production
- heavy investment
- difficult if production is stopped
- can’t make different versions of the product
Factors Affecting Choice Of Production
- nature of the product
- seasonality
- scale of production
- sources of finance available
- lifetime of product
- size of workforce
Define Cell Production
Where workers are organised into multi-skilled teams and each team is responsible for a particular part of the production process.
Advantages of Cell Production
- lead to increased efficiency as workers are knowledgeable and skilled
- increased motivation as employees are using their skills
- cause workers to become multi skilled
- improves communication
- quality improves due to employees working together
Disadvantages of Cell Production
- cost implication due to training of employees
- productivity must be high for it to work
- only work if Working culture is appropriate (e.g. proactive employees)
Define Division of Labour
Allocation of labour to specific tasks.
Define Specialisation
Where workers become skilled within a specific area.
Define Critical Path Analysis
Process that allows overall time of project to be calculated.
Advantages of CPA
- helps reduce risk of complex projects
- encourages careful assessment
- decision AND planning tool
- ordering can be made more efficient
Disadvantages of CPA
- based on estimation and assumptions
- does not guarantee success of the project
- often complex when there are lots of tasks
- diagrams alone don’t ensure the efficient working of the operation
How do you calculate Earliest Strat Time (EST)
EST = total time taken for previous activity
e.g. task 1 takes 2hrs, task 2 takes 4hrs task 3 can start when?
answer = 6hrs in
How do you calculate Latest Finish Time (LFT)?
LFT = subtract task’s durations n from previous tasks LFT
e.g. task 8 LFT is 24hrs and task 7 takes 4hrs, what is task 7’s LFT?
answer = 20hrs
How do you calculate Total Float?
TOTAL FLOAT = LFT - EST
How do you calculate FREE FLOAT?
EST (next activity) - duration - EST
How do you calculate PERT ANALYSIS?
(Optimistic time + 4 x likely time + pessimistic time)/6
Define Gantt Chart
A graphical representation of the order and duration of tasks.
Advantages of Gantt Charts
- visual representation
- easy to monitor
- see what is happening
- shows time and resource allocation