By the end of this topic, you should be able to...
construct and interpret 2D drawings and 3D models, including isometric, orthographic projection, assembly and exploded drawings.
Guiding Question
Why is it necessary for designers to prototype ideas as part of a design process?
💡 Did You Know? In 1999, NASA's $327 million Mars Climate Orbiter burned up in the Martian atmosphere because one engineering team used metric units while another used imperial—a catastrophe that precise technical drawings would have prevented.
Why Technical Drawing?
Technical drawings are the universal language that turns ideas into reality. When you hand a manufacturer an isometric drawing, they instantly visualize your 3D form without ambiguity. When you provide orthographic projections with dimensions, machinists in Germany, China, or Brazil can fabricate your part to 0.1mm tolerance without ever speaking to you.
When you create an exploded drawing, assembly workers understand exactly how 47 components fit together—in sequence—without destroying the product to figure it out. These aren't artistic exercises; they're precision communication tools that eliminate the expensive game of telephone between designer, engineer, manufacturer, and end-user.
Isometric drawings show shape and proportion;
Orthographic projections (front, top, side views) reveal exact dimensions and hidden features
Assembly drawings demonstrate how parts relate
Exploded views sequence construction.
Master these conventions, and you speak the language of global manufacturing. Ignore them, and your brilliant design remains trapped in your notebook—unbuildable, unsellable, unrealized.
Case in Point
IKEA's assembly instructions are masterclasses in technical drawing. Without a single word of text, their exploded isometric diagrams guide millions of customers annually through complex furniture assembly—transcending language barriers across 60+ countries. This clarity isn't accidental; it's the result of rigorous orthographic planning, tested assembly sequences, and standardized drawing conventions that make the impossible seem obvious.
Learning Goals
In this topic, you'll develop the technical drawing literacy to construct accurate 2D and 3D representations and interpret professional manufacturing drawings—skills essential for communicating your IA design to examiners, manufacturers, and users with precision and confidence.
Linking Questions
When creating physical prototypes, which ergonomic considerations should be taken into account? (A1.1)
To what extent are user-centred research strategies useful to gather feedback on models and prototypes of proposed design solutions? (A2.1)
How do designers use their knowledge of prototyping techniques to ensure effective modelling and prototyping? (A2.2)
Which aspects of material properties can be explored through modelling? (A3.1)
How can information about a proposed structural system, such as a product housing, be gathered using CAD modelling and contribute to the development of a design solution? (A3.2, B3.2)
How effectively can mechanical systems be mocked up and tested using modelling and prototyping? (A3.3, B3.3)
How can effective electronic systems be modelled virtually? (A3.4, B3.4)
How does the development of prototypes inform the choice of manufacturing techniques and production systems for a product? (A4.1, B4.1)
How can modelling and prototyping be used to inform the development of a product following a user-centred design (UCD) strategy? (B1.1)
To what extent is modelling and prototyping essential for inclusive design? (B2.2)
To what extent can the same materials used for modelling and prototyping be used in the material selection of a commercial product? (B3.1)