Tutorial 7 Human Factor in Design Subject: GE 105 - Introduction to Engineering Design Instructor: Dr. Raja Rizwan Hussain College of Engineering King Saud University Tutorial 7 Human Factor in Design

Human Factors in Design; Anthropometric factors Ergonomic factors Physiological factors Psychological factors

Anthropometric factors  Human measurements etc.

Ergonomic factors Design factors intended to maximize productivity by minimizing operator fatigue and discomfort

Example: Chair ergonomic posture

Example: computer ergonomic posture

Physiological factors Related with human body functions Psycological factors Refers to things that can influence the functions, attitude and characteristics of the human mind

Question 1 State and comments on human factors that you will consider in the design of vacuum cleaner

Human Factors will be considered : Anthropometric Factors Height range 145-175cm. Average 155cm People comfort if hold the grip around the waist. Waist height +/- ½ of height = 85cm H =85cm The length can be adjust +/- 10cm H

Power Button near to the finger that grip Ergonomic Factors Handle Shape Handle can be rotate Comfort Grip Power Button near to the finger that grip Safety : Auto off if there are overload/overheat/short-circuit Easy to handle Example: Mouse pad, bicycle

Psychological Factors Physiological Factors Noise level below 50 dB Frequency range (humans audible range of frequencies is usually said to be 20 Hz to 20 kHz) (20,000 Hz) Psychological Factors Good shape When the handled is release the device will turn off automatically Easy to move

Question 2 Sketch a wheel chair and comment on their designs based on the human factors consideration.

Question 3 Sketch a shower box and comment on their designs based on the human factors consideration.

Question 4 State and comments on human factors that you will consider in the design of a bicycle.