- The CEO of Carol O'Lights Manufacturing, produces custom-built relay devices for auto makers. The most recent project undertaken by Ms. O'Lights requires 11 different activities. The activities necessary to build an experimental relay model and related data are given in the following table. What is the critical path? ACTIVITY DESCRIPTION PREDECESSOR TIME (WEEKS) A Order new Machinery 6 B Plan new physical layout 4 C Determine safety changes in 2 existing machinery D Receive equipment C 1 E Hire new employees BD 4 F Make plant alterations A, E 10 Make changes in existing G E 2 machinery H Train new employees F G 6 1 Install new machinery F G 11 J Relocate old machinery D 16 Conduct employee safety K H, I, J 8 orientation B-E-F-H-K C-D-E-F-I-K C-D-J-K A-F-I-K B-E-F-I-K