7-17 The TLB Yogurt Company must be able to make 600 party cakes in a 40-hour week. Use the
following information to draw and label a precedence diagram, compute cycle time, compute the
theoretical minimum number of workstations, balance the assembly line and calculate its efficiency.


                           Work element

                                       Precedence

                                                 Preformance Time (min)

                           A

                                       -

                                                 1

                           B

                                       A

                                                 2

                           C

                                       B

                                                 2

                           D

                                       A, E

                                                 4

                           E

                                       -

                                                 3

                           F

                                       C, D

                                                 4