Henry ford improved which of the following concepts? select one of the options below as your a. computer management b. assembly-line principles c. time-study analysis d. just-in-time inventory management e. steel production

"Assembly line principles" is the concept among the choices given in the question that Henry Ford improved. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that has actually come to your great help.