This HL mini-lesson covers Topic 10 — Commercial production: the economics of production, break-even, economies of scale, lean and just-in-time production, and quality management.
Work through each screen, answer the questions as you go (some are wordy, some are calculations) and collect ⭐ stars. Press Start when you are ready.
Producing commercially means managing cost. Fixed costs stay the same however many units are made (rent, machinery, tooling). Variable costs rise with each unit (materials, energy per part, some labour).
Key idea: spreading a large fixed cost over more units lowers the cost per unit — the basis of economies of scale.
The break-even point is the number of units at which total revenue exactly covers total cost — no profit, no loss. The contribution per unit is the selling price minus the variable cost.
Fixed cost £12,000; price £25; variable cost £13.
contribution = 25 − 13 = £12; break-even = 12,000 ÷ 12 = 1000 units
Tap a term, then tap the category it belongs to.
Lean production systematically cuts waste — of time, material, motion and stock. Just-in-time (JIT) is a key lean tool: parts arrive exactly when needed, so little stock is stored, freeing cash and space (but needing reliable suppliers).
Quality is managed two ways: quality control (QC) inspects finished output and rejects faults; quality assurance (QA) / total quality management (TQM) builds quality in at every stage so faults are prevented, not just caught.
Watch out: JIT reduces stockholding costs but leaves production vulnerable to supply-chain disruption — a real trade-off to evaluate.
Tap a description on the left, then its term on the right.
On a break-even chart, fixed cost is a flat line, total cost rises from it, and revenue rises from the origin. Where revenue crosses total cost is the break-even point; beyond it lies profit, before it, loss. The vertical gap shows the size of each.
Key idea: a lower fixed cost or higher contribution per unit moves break-even to fewer units.
Scaling up spreads fixed costs and unlocks bulk buying, cutting unit cost — economies of scale. But grow too big and coordination, bureaucracy and communication problems can raise costs again — diseconomies of scale.
There is an optimal size where unit cost is lowest.
Just-in-time holds minimal stock, freeing cash and space but exposing the line to supply shocks. Just-in-case keeps buffer stock as insurance, tying up money but absorbing disruption. Firms choose based on supplier reliability and the cost of stopping the line.
Trade-off: recent supply-chain shocks have pushed some firms back toward buffer stock.
Lean production uses simple tools: kanban cards pull work through only as needed, and kaizen means continuous small improvements suggested by the workers themselves. Together they cut waste, smooth flow and steadily raise quality.
The aim is a steady stream of value with the least possible waste.
Total quality management (TQM) makes quality everyone's responsibility, at every stage, aiming to prevent defects rather than inspect them out. Quality circles, clear standards and data-driven improvement reduce scrap, rework and warranty costs.
Key idea: preventing a fault is far cheaper than detecting and fixing it after production.
Costs: fixed (rent, machinery) do not change with output; variable (materials) rise per unit.
Break-even: units = fixed cost ÷ (price − variable cost per unit).
Economies of scale: spreading fixed costs over more units lowers unit cost.
Lean & JIT: cut waste and stock; make only what is needed, when needed.
Quality: QC (inspect output) vs QA/TQM (build quality in throughout).
You have worked through Commercial Production for IB Diploma Design Technology HL. Press Finish to see your score.
You have worked through Commercial Production for IB Diploma Design Technology HL. 🎉
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