The scales of production (one-off or bespoke, batch, mass and continuous), just-in-time and lean manufacturing, the relationship between volume, tooling cost and unit cost, and how the chosen scale shapes the manufacturing method.

A Component 1 short-answer question. Marks for the contrast and for each example.

Batch production makes a specific quantity (a batch) of identical products, then the equipment can be reset to make a different batch or product; it suits medium quantities and gives flexibility (a bakery making 500 loaves, a run of a particular furniture design). Mass production makes very large numbers of identical products continuously on a dedicated production line, usually with high automation, giving a very low unit cost (cars, smartphones, drinks bottles).

Award marks for the contrast (set quantity with resetting versus very high continuous volume) and a sensible example of each. A common dropped mark is confusing batch with mass or giving a one-off product as mass.

A Component 1 extended question marked by levels of response. Reward the link between volume, tooling and unit cost.

At low volume (one-off or small batch), processes with low tooling cost are chosen (vacuum forming, 3D printing, hand finishing); the unit cost is high but no expensive mould is needed. At high volume (mass), processes with high tooling cost but very low cost per part are chosen (injection moulding), because the mould cost is spread over millions of parts, so the unit cost falls dramatically.

A top answer explains that volume sets the trade-off: high tooling cost only pays off at high volume, where automation and fast cycle times cut the unit cost. It uses named processes and reaches a clear conclusion that the scale of production, more than anything else, decides the economic process choice.