9.15 The following table details the tasks required for
Indiana-based Frank Pianki Industries to manufacture a fully
portable industrial vacuum cleaner. The times in the table are in
minutes. Demand forecasts indicate a need to operate with a cycle
time of 10 minutes.
Activity Activity Description Immediate Predecessors Time
ACTIVITY ACTIVITY DESCRIPTION
A Attach wheels to tub — 5
B Attach motor to lid — 1.5
C Attach battery pack B 3
D Attach safety cutoff C 4
E Attach filters B 3
F Attach lid to tub A, E 2
G Assemble attachments — 3
H Function test D, F, G 3.5
I Final inspection H 2
J Packing I 2
a) Draw the appropriate precedence diagram for this production
b) Assign tasks to workstations and determine how much idle
time is present each cycle.
c) Discuss how this balance could be improved to 100%.