In motion study, the    Therblig symbol represents:

Explanation:

Motion Study:

It is a technique to record and time an activity/operation. It deals with –

• Taking motion pictures of the operation of the study with a clock fixed by the side of the operation.
• Operating a motion picture camera or a video camera at a known constant speed.

Purpose:

• It is used as an aid to study the activities of two or more operators who work as a group.
• It is used to study the interrelationship among the activities of the operator and the machines.
• It helps to find the preferred method of performing the activities of the job.
• It helps to identify unnecessary and fatigue producing motion.

Based on the results of the motion study, Gilbreth identified 18 basic motions using which any job can be performed. It represents elementary body movement and eye movement. They are given as follows: