1. Illustrating Events and Steps Product Design Sketching

2. Explaining Sequences and Operations Product design deals with  The form  The use The interactions between users and products  The user notices changes in the product  The user changes the form of the product We use diagrams to help us to ‘play’ the interactions and to communicate our design intent

3. Simple Operations Single-action operations  Holding a product  Pressing buttons  Turning a knob Including part of human body in a sketch can be very effective

4. Movement Longer stroke, with specific target  Inserting coins  Pulling tabs  Flipping a cover Use arrows to indicate locus and target

5. Compound Actions Show path with direction change Draw the arrow according to the path The orientation of component should match that of the arrow head to avoid confusion

6. Steps A chain of events Usually combined with an exploded drawing Number arrows to indicate sequence Position the components in a simple path

7. Integrated Sketches Explain operation and construction at the same time Position components according to how they open or swing Use captions and different types of arrows to prevent confusion

8. Activity Draw diagrams to illustrate the following events  Putting coins into a public telephone  Passing Octopus card over an MTR gate  Inserting a bank-card into an ATM  Pulling out a stylus from PDA Must include at least a palm Draw on tracing paper, one diagram per A4 sheet Use suitable colour combination to enhance visual clarity Tune for table-top presentation

9. Multi-Frame Diagrams For complicate interaction More than one component Change in focus Change in product form Final presentation

10. One Action per Frame One simple action per frame No change in product orientation Easy to relate

11. Compound Actions Compound actions may be used Must use the same orientation to avoid confusion

12. View Angle Inconsistency Viewer may interpret the two steps as two different objects in one step

13. Confusing View Angles Avoid view angles that have few visual cues Avoid view angles that are not related to normal product use

14. Misleading Arrows Avoid arrows with more than one possible interpretation View angle inconsistency leads to confusion

15. Instructions w/ hand

16. Instructions w/ arrow

19. Activity Draw how to use the buttons of your camera (1 sketch) Draw how to remove memory card from your camera (a series of sketches) Use as few texts as possible Include human figures or hands in your composition