The diagram below shows the precedence relationships and task times (in minutes) for assembly of a product. The table provides the task times for each task.

Task Positional

Task Time Weight

A 6 _____

B 4 _____

C 5 _____

D 7 _____

E 5 _5__

F 3 _3__

G 2 _2__

(a) Fill in the positional weights in the table above for A, B, C and D.

(b) Using the positional weights from the table and a cycle time of 9 minutes per workstation, assign the 7 tasks to workstations using the ranked positional weight technique. Show all your work and indicate below the sequential assignments of the tasks to workstations (1^st, 2^nd, 3^rd, etc.) below.

Task assigned 1^st = ____ assigned to WS ____

Task assigned 2^nd = ____ assigned to WS ____

Task assigned 3^rd = ____ assigned to WS ____

Task assigned 4^th = ____ assigned to WS ____

Task assigned 5^th = ____ assigned to WS ____

Task assigned 6^th = ____ assigned to WS ____

Task assigned 7^th = ____ assigned to WS ____

c) What is the efficiency delay for your solution in part b) using a cycle time of 9 minutes?

d) Find the best balance for this data for a cycle time of 9 minutes (using the fewest workstations and most even balance).