TABLE OF CONTENTS The Mean Corrective Maintenance Time ( M ct) is an indication of how long it takes to perform a task. This value is normally determined via historical data or by time studies. When predicting individual Mean Corrective Maintenance times for a new system, the value should include an adjustment for the degree of difficulty in gaining access to a component and for maintainer fatigue when performing maintenance in unusual/difficult postures.
Physical factors that influence the ability of a person to perform a specific task include age, sex, and size.
| [Human Factors] | 5 th % | 50 th % | 95 th % | ||||
|---|---|---|---|---|---|---|---|
| Measurement | Male | Female | Male | Female | Male | Female | |
| Standing Height | = | 63.6" | 59.0" | 68.3" | 62.9" | 72.8" | 67.1" |
| Forward Reach | = | 31.9" | 29.7" | 34.6" | 31.8" | 37.3" | 34.1" |
| Weight (lbs) | = | 124 | 104 | 168 | 139 | 224 | 208 |
| Eye Height | = | 60.8" | 57.3" | 64.7" | 60.3" | 68.7" | 65.3" |
Physiological factors influencing performance include attitude, motivation, and stress.
Maslow's Hierarchy of Needs describe a person's priorities (listed from highest to lowest priority):
Self-Actualization: Growth, achieving one's potential, and self-fulfillment.
Esteem: Self-respect, achievement, status, recognition, and attention.
Social: Affection, feelings of belonging, acceptance, and friendship.
Safety: Security and protection from physical and emotional harm.
Physiological: Hunger, thirst, shelter, sex, and other bodily needs.
McGregor's Theory X and Theory Y describe a person's willingness to work:
Theory X: Inherent dislike for work, little ambition, dislike responsibility.
Theory Y: Enjoys...
