Page "Frank Bunker Gilbreth, Sr." Paragraph 4

According to Claude George ( 1968 ), Gilbreth reduced all motions of the hand into some combination of 17 basic motions.

These included grasp, transport loaded, and hold.

Gilbreth named the motions therbligs, " Gilbreth " spelled backwards with the th transposed.

He used a motion picture camera that was calibrated in fractions of minutes to time the smallest of motions in workers.