A. Design in theory
B. Design in practice
B1.1 User-centred design
B2.1 The design process
B2.2 Modelling and prototyping
B3.1 Material selection
B3.2 Structural systems application and selection (HL only)
B3.3 Mechanical systems application and selection (HL only)
B3.4 Electronic systems application and selection (HL only)
B4.1 Production systems (HL only)
C. Design in context
B3.3.1 Mechanical advantage calculations
B3.3.2 Velocity ratio calculations
B3.3.3 Efficiency calculations
B3.3.4 Gear and belt-driven system applications
B3.3.5 Cam and follower systems
B3.3.6 Levers and load-effort systems