1. Community Project Design and Manufacture National 4 & 5

2. Ergonomics What does it mean? Ergonomics is the study of how humans interact with their environments and the products in them. Ergonomics Anthropometrics Physiology Psychology Designers must consider ergonomics to ensure products fit well, can be operated appropriately and are easy to understand and use.

3. Ergonomics Anthropometrics Anthropometrics is the study of measurements and dimensions of the human body. As designers you cannot design for 100% of the population. The aim is design for 90% of the population.

4. Ergonomics Anthropometrics We are all individuals with different body sizes. The graph below shows the normal distribution curve for a given number of people against a particular body size i.e. height. Population Height 5th 50th 95th

5. Ergonomics Anthropometrics Generally speaking when designers are considering the following aspects of a design they are influenced by the percentiles highlighted below: Clearance: 95 th percentile Fit: 50 th percentile Reach: 5 th percentile

6. Ergonomics Anthropometrics What percentile of standing height should designers consider when designing the height of this bus stop? Why?

7. Ergonomics Anthropometrics What percentile of knee to sole of foot size should designers consider when designing the height of this office chair? Why?

8. Ergonomics Anthropometrics What percentile of finger length should designers consider when designing the distance to the trigger? Why?

9. Ergonomics Physiology Physiology is concerned with the capabilities of the human body. Is the vacuum cleaner light enough to use as it was intended? Can the trigger be operated easily?

10. Ergonomics Physiology How much strength and dexterity is required to operate the tin opener?

11. Ergonomics Psychology Psychology is how people interact with products mentally. How do we know the kettle is boiling the water?

12. Ergonomics Psychology How do we distinguish between the buttons? Is this important to how the product functions?

13. Ergonomics Psychology How do we know how to heat separate parts of the car?