2. Digital Assembling a single camera each of these tasks is provided below: Eye

Question

2. Digital Assembling a single camera each of these tasks is provided below: Eye must desig n an assembly line to produce a new line of slim digital cameras. requires the completion of nine distinct tasks, and information about Immediate Predecessors Task Duration No Task Seconds) 20 15 12 D,E C.F G.H 30 25 This assembly line will operate 8 hours a day to produce 600 digital cameras daily. Digital Eye will use the Longest Processing Time Rule (LPT) to create the design. 1.1. What is the cycle time of Digital Eye's assembly line, in seconds? 1.2. How many workstations are required by this design and what tasks will be done at which workstations? 1.3. Which workstation enjoys the maximum idle time? How efficient is this design? 1.4. How does the actual number of workstations required by this design compare to its theoretical minimum number of workstations?

Explanation / Answer

By LPT

T Time (Sec) 28800 Task Time Pre ES EF TCT Total cycle time 154 A 20 None 0 20 Units 600 B 15 A 20 35 TC Target cycle time 48 Ans 1.1 C 20 A 20 40 (TCT/TC) Min Workstation 3.208333 Ans 1.2 D 12 B 35 47 Idle time 38 E 8 B 35 43 F 15 B 35 50 G 30 D,E 47 77 H 25 C,F 50 75 I 9 G,H 77 86 Total cycle time 154

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