Operations is the part of a business that turns inputs such as raw materials, labour and machinery into finished goods or services. The way a firm organises this work is called its production method, and the three main methods are job, batch and flow production.
Job production
In job production one item is made at a time, usually to a customer's exact request. Each job is finished before the next begins.
- Used for made-to-measure work: a tailored abaya, a hand-built cabinet, a custom cake.
- Advantages: high quality, unique products, and the customer can request changes.
- Disadvantages: slow, labour-intensive and expensive per unit; skilled staff are needed.
Batch production
In batch production a group (batch) of identical items is made together, then the equipment is switched to make a different batch.
- Used by bakeries making 200 date scones, then 200 wholemeal loaves.
- Advantages: more variety than flow, and machinery is shared across products.
- Disadvantages: time and money are lost when switching between batches, and part-finished stock builds up.
Flow production
In flow production identical items move continuously along a production line, often 24 hours a day, with heavy use of machinery.
- Used to make bottled water, tinned chickpeas or mobile phones in large volumes.
- Advantages: very low cost per unit, consistent quality and high output.
- Disadvantages: high set-up cost, little flexibility, and a breakdown can halt the whole line.
Choosing a method
The best method depends on the size of the market, how standardised the product is, and how much money the firm can invest. A firm serving a small niche of customers who each want something different will lean towards job production, while a firm supplying a mass market of identical goods will lean towards flow. Batch sits between the two, giving useful variety at a lower cost than job. As demand grows, many firms move from job to batch to flow so that they can lower their cost per unit and compete on price. The right choice is the one that matches the product, the customers and the resources the business actually has.
Put these production methods in the order a growing business typically moves through them:
- Job production (one item at a time)
- Batch production (groups of identical items)
- Flow production (continuous production line)