As part of a major plant renovation project, the industrial engineering department has been asked to...
As part of a major plant renovation project, the industrial engineering department has been asked to balance a revised assembly operation to achieve an output of 240 units per eight-hour day. Task times and precedence relationships are as follows:
| Task | Duration (minutes) |
Immediate Predecessor |
| a | 0.2 | - |
| b | 0.4 | a |
| c | 0.2 | b |
| d | 0.4 | - |
| e | 1.2 | d |
| f | 1.2 | c |
| g | 1.0 | e, f |
d. Assign tasks to workstations on the basis of greatest number of following tasks. Use longest processing time as a tiebreaker. If ties still exist, assume indifference in choice.
Answer:
| Work stations | Following Tasks |
| I | A, B, D, C |
| II | E |
| III | F |
| IV | G |
e. Compute the percentage of idle time for the assignment in part d. Use the actual bottleneck cycle time in your calculation. (Round your answer to 2 decimal places. Omit the "%" sign in your response.)
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As part of a major plant renovation project, the industrial
engineering department has been asked to...
e As part of a major plant renovation project, the industrial engineering department has been asked...
e As part of a major plant renovation project, the industrial engineering department has been asked to balance an assembly operation. Assume full 8 hours are available per day. Precedence relationships and tasks times are shown below. If daily demand is 285 units of output, there needs to be workstations to meet the demand. The answer is an integer Task Time (minutes) Cycle time (c) Theoretical minimum number of stations (TM) = Idle time = nc - Et Efficiency (%)...
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e As part of a major plant renovation project, the industrial engineering department has been asked to balance an assembly operation. Assume full 8 hours are available per day. Precedence relationships and tasks times are shown below. If daily demand is 285 units of output, there needs to be workstations to meet the demand. The answer is an integer Task Time (minutes) Cycle time (c) Theoretical minimum number of stations (TM) = Idle time = nc - Et Efficiency (%)...
3. A manager wants to assign tasks to workstations in order to achieve an hourly output rate of four units. The depart- working time of 56 minutes per hour. ment uses a Assign the tasks shown in the following precedence network (times are on the nodes and are in minutes) to workstations using the following heuristic rules: (i) Assign the task with the largest positional weight. (ii) Tiebreaker: "Assign the task with the longest time." If a tie still exists,...
4. A large manufacturer of pencil sharpeners is planning to add a new sharpener, and you have been asked to bal- ance the assembly line, given the following task times and precedence relationships. Assume that cycle time is 1.3 minutes per unit. Task Duration (minutes) 0.2 Immediate Follower 0.4 0.3 1.3 oooo s T 0.1 0.8 0.3 1.2 a. Do each of the following: i. Draw the precedence network. ii. Assign the tasks to workstations using the heuristic rule "Assign...
2. Show all the steps for the question to be worth any
marks.
The following table presentss the tasks, durations, and immediate predecessors necessary to produce a particular Rroduct The required daily output is 320 units, and the working day is 8.0 hours on an assembly line. Immediate Predecessor Duration (in minutes) Activity A 0.9 B 0.7 C 0.8 Г E 0.4 В, с А, D E 0.5 0.4 G E 0.6 Н F, G 0.5 T 1.1 a. Draw...
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