Which of the following is a major challenge in converting the fabrication shop into manufacturing cells? a) Lack of expertise in cellular manufacturing b) Large volume of similar products c) Low product variety d) Large pieces of equipment. ANSWER THIS FROM " Esterline Technologies: Lean Manufacturing by R I C H A R D L . N O L A N K A R E N A . B R O W N S U B O D H A K U M A R