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Magazine Chapter 2: Q5OQ (page 191)
An assembly line is to operate eight hours per day with the desired output of 240 units per day. The following table contains information on this product鈥檚 task times and precedence relationships:
Task | Task Time (seconds) | Immediate predecessor |
A | 60 | - |
B | 80 | A |
C | 20 | A |
D | 50 | A |
E | 90 | B,C |
F | 30 | C,D |
G | 30 | E,F |
H | 60 | G |
- Draw the precedence diagram.
- b.What is the workstation cycle time required to produce 240 units per day?
- Balance this line using the longest task time.
- What is the efficiency of your line balance, assuming it is running at the cycle time from part (b)?
Short Answer
The method that is used in the process of mass manufacturing any items is referred to as Assembly lines.
Step by step solution
(a) The precedence diagram
(b) The workstation cycle time required to produce 240 units per day
(c) Balancing line using the longest task time
(d) The efficiency of your line balance, assuming it is running at the cycle time from part (b)
The formula is given below-
Efficiency = (Sum of task time)/(workstationxcycle time)
Given,
Sum of task time = 400 seconds
Workstation = 2
Cycle time = 60
Efficiency=400seconds/2 workstationsx60 cycle time
=3.33%
Hence, the efficiency of line balance is 3.33%.
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