Subject GE 105 Introduction to Engineering Design Instructor

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

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 • • •

Physiological Factors • Noise level below 50 d. B • Frequency range (humans audible range of frequencies is usually said to be 20 Hz to 20 k. Hz) (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.