MOTION STUDY

• Parts should be held in position by fixtures.
• Multiple cuts should be taken whenever possible by combining two or more tools in one, or by arranging simultaneous cuts from both feeding devices, if available

  (cross side and hex turret).
• Rhythm is essential to the smooth and automatic performance of an operation, and the work should be arranged to permit an easy and natural rhythm wherever possible
• The visual requirements of the workplace should be considered so that eye fixation demands are minimized.
• Gravity bins and drop delivery should reduce reach and move times
• ejectors should remove finished parts automatically.
• Fixed locations for all tools and material should be provided to permit the best sequence and to eliminate or reduce the therbligs search and select.
• The middle finger and the thumb are the strongest working fingers.
• Finger and wrist motions are made while the forearm and upper arm are stationary.
• Finger motions are made by moving the finger or fingers while the remainder of the arm is kept stationary.
• Momentum, should assist workers wherever possible, and should be minimized if it must be overcome by muscular effort.
• MOTION STUDY The careful analysis of body motions employed in doing a job
• Effective therbligs directly advance the progress of the work.
• Ineffective therbligs do not advance the progress of the work
• The analyst creates a summary at the bottom of the sheet, indicating the cycle time, pieces per cycle, and time per piece.
• A motion study is an investigation into how people move when they perform tasks.
• motions made by the hands should be made symmetrically and simultaneously away from and toward the center of the bo