Explanation: principle of motion economy developed by Frank and Lillian Gilbreth are guidelines to help determine the work method, workplace layout, tools, and equipment.
The aim of this is to help in identifying and replicating one best way to complete a task and also minimize the physical and perceptual loads imposed on people engaged in that task.
A Southern Unionist was a white Southerner who either opposed secession and the Confederate States of America and/or supported the Union or stayed neutral.
