3.3.5 Communication of design ideas - AQA GCSE DT

Designing and making principles textbook: Section 6 designing principles, chapter 45 - 2D and 3D drawing techniques, modelling, recording, scale and dimensions

annotated drawing

a drawing (using any technique) labelled with details and explanations

freehand sketching

drawing without guides and equipment to quickly note initial ideas

systems diagrams

show different stages eg. input, process and output

schematic diagram

represent systems eg. circuit diagrams, flats

flat

technical schemtic diagram of clothing without a body
digital, symmetrical, and with accurate proportions

working drawings (3rd angle orthographic projection)

shows object in 2D plan (top), front and side views accurately and to scale
uses a symbol to indicate its a 3rd angle orthographic projection

3rd angle orthographic symbol

scale

drawn length : actual length as a ratio

dimensions

show the real measurements of an object in mm

isometric projection

3D drawing with horizontal lines at 30 degrees, doesn't distort view

oblique projection

3D drawing using 45 degree angles to show front, distorts view

1 point perspective

1 vanishing point for front view, distorts view

2 point perspective

2 vanishing points to show 2 sides, distorts view

exploded drawing

shows how components fit together using alignment and lines, used for construction and assembly

mathematical modelling

using simulations and visual depictions to present mathematical info

modelling

used to see product in 3D using physical materials or digital CAD/CAM software

CAD modelling

computer aided design, used for precise, digital and technical drawings in 2D or 3D

audio and visual recording

used to record how a product works, testing, interviews etc. for reference