Operations methods are the ways a company turns raw materials into finished products. Think of them like different cooking styles in a kitchen: batch cooking (making a large pot at once), continuous cooking (water boiling forever), or just‑in‑time cooking (preparing each dish as it’s ordered). Each method has its own rhythm, tools, and staff roles.
| Method | Typical Use | Key Feature |
|---|---|---|
| Batch | Manufacturing a set quantity at a time (e.g., 100 t-shirts) | High flexibility, low inventory |
| Continuous | Production runs 24/7 (e.g., oil refining) | High efficiency, low setup time |
| Just‑in‑Time (JIT) | Produce only what is needed (e.g., custom PCs) | Very low inventory, high responsiveness |
| Mass Customisation | Large volumes with small variations (e.g., Nike shoes) | Combines scale with flexibility |
Capital Investment – Switching from batch to continuous often means buying new machines. Think of it like upgrading from a home stove to a commercial oven; the cost can be huge. 💰
Training & Skill Gap – Workers used to batch processes may struggle with the speed of continuous lines. It’s like teaching a seasoned baker to use a high‑speed mixer. 🍰
Supply Chain Disruption – New methods may require different raw material sizes or delivery schedules. Imagine switching from bulk flour to pre‑measured packets – suppliers need to adapt. 🚚
Quality Control Issues – Continuous lines can spread a defect across many units. It’s like a single bad batch of cookies ruining an entire tray. 🍪
Inventory Management – JIT reduces stock but increases the risk of stockouts if a supplier delays. Think of it as ordering pizza dough only when a pizza is ordered. 🍕
Changeover Time – Switching products on a continuous line can take hours, causing downtime. It’s similar to cleaning a grill between orders. 🔄
Regulatory & Safety Concerns – New equipment may need new safety checks or certifications. Picture a factory needing a new fire alarm system when adding a new machine. 🚨
The total cost of switching methods can be expressed as:
\$\$
C{\text{total}} = C{\text{investment}} + C{\text{training}} + C{\text{downtime}} + C_{\text{inventory}}
\$\$
Where each term represents a different cost component. For example, if a factory spends £200,000 on new machines, £50,000 on training, £30,000 on lost production during changeover, and £20,000 on extra inventory, the total cost is £300,000. 📊
A toy factory that used batch production for 10 years decided to switch to a continuous line to meet growing demand. They faced:
After the switch, they achieved a 25% increase in output but had to manage the initial cost and downtime carefully. ⚙️