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8 Sep 2001: Economics. Can be economic for any batch size from one-offs to mass production (with or without automation).

8 Sep 2001: Economics. It is normal to try to reduce the amount of drilling required in a component by careful design - but when an accurate hole is required, drilling has little competition.

8 Sep 2001: Some scrap is always produced and cannot be directly recycled. Economics.

8 Sep 2001: Economics. Basic equipment costs around £10,000, but automation can increase this significantly.

5 Sep 2001: Devising simple material tests is an important aspect of appreciating which properties are important in a design, and the challenges in obtaining meaningful, relevant material data.

8 Sep 2001: Economics. To reduce costs, several parts are often moulded together on a "tree-like" structure; parts can then be separated after moulding. ... Injection moulding is only economic for batches of 10,000 - 100,000 or more and so is usually automated.

7 Sep 2001: Young's modulus measures stiffness and is a material constant, i.e. it is the same whatever the size of the test-piece.

8 Sep 2001: Economics. The production speed is limited by opening and closing the mould, so automation is normally used.

7 Sep 2001: it is the same whatever the size of the test-piece. Many applications require stiff materials, e.g.

8 Sep 2001: Economics. If possible, avoid cutting! A surprising number of designs involve a cutting process followed by a joining process.