Problem 6-17

Some tasks and the order in which they must be performed according to their assembly requirements are shown in the following table. These are to be combined into workstations to create an assembly line. The assembly line operates 9.25 hours per day. The output requirement is 900 units per day.

a. What is the workstation cycle time?

Workstation cycle time ______ seconds per unit.

b. Balance the line using the longest task time based on the 900-unit forecast, stating which tasks would be done in each workstation. (Leave no cells blank - be certain to enter "0" wherever required.)

Answer for Tasks for table above:

Work Station I:

Task: (A-B) or (A-C) or A or (A-C-B) ?

Work Station II:

Task: G or (C-D) or (B-D) or D ?

Work Station III:

Task: F or (D-H) or (F-G) or H ?

Work Station IV:

Task: D or (F-D) or I or (E-I) ?

Work Station V:

Task: (H-J-K) or J or (F-K) or K ?

Work Station VI:

Task: L or (K-L) or (G-J-L) or (K-J-L) ?

c. What is the efficiency of your line balance? (Round your answer to 1 decimal place.)

Efficiency __________ %

d. After production was started, Marketing realized that they understated demand and must increase output to 1,000 units. There are two options: reduce cycle time or work overtime. Please identify the following: (Round your answers to the nearest whole number.)

Increase or Reduce ? cycle time to __________ seconds of work _________ minutes of overtime.

PRECEDING TASK TASKS A B A A D B E B F TIME (SECONDS) 25 10 20 16 18 20 TASK G H 1 J K L PRECEDING TASKS D E F, G HI J, K TIME (SECONDS) 15 12 14 10 9 8 Work Station Task Idle Time | II = IV V VI