ITPEC FE Morning October 2023 Question 72

Creating product design drawings by computer from shape and composition data — CAD is computer-aided design.

CAD (Computer-Aided Design) replaces the drawing board: the designer enters the attributes of the product's shape and structure, and the computer produces and edits the drawings, often as 3D models that later stages reuse.

Answer (c)

Why not others:

• •(a) — testing a product's performance and functions by computer simulation instead of real experiments is CAE (computer-aided engineering)
• •(b) — converting design drawings into process information to automate machining is CAM (computer-aided manufacturing)
• •(d) — deriving required quantities and timing of materials from the production schedule, BOM and inventory is MRP (material requirements planning)

Key rule: CAD draws the product, CAE tests it virtually, CAM makes it by machine, and MRP plans the materials for it.

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