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A set of jobs A, B, C, D, E, F, G, H arrive at time t = 0 for processing on turning and grinding machines. Each job needs to be processed in sequence-first on the turning machine and second on the grinding machine, and the grinding must occur immediately after turning. The processing times of the jobs are given below. 

If the makespan is to be minimized, then the optimal sequence in which these jobs must be processed on the turning and grinding machines is  
  • a)
    A-D-E-F-H-C-G-B    
  • b)
    B-G-C-H-F-D-E-A  
  • c)
    G-E-D-F-H-C-A-B  
  • d)
    A-E-D-F-H-C-G-B 
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
A set of jobs A, B, C, D, E, F, G, H arrive at time t = 0 for processi...

Applying Johnson’s rule
Find minimum processing time and if it is from machine 1, sequenced it from start side and if it is from machine 2 sequenced from end side.

Answer : A - E - D - F - H - C - G - B 
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A set of jobs A, B, C, D, E, F, G, H arrive at time t = 0 for processing on turning and grinding machines. Each job needs to be processed in sequence-first on the turning machine and second on the grinding machine, and the grinding must occur immediately after turning. The processing times of the jobs are given below.If the makespan is to be minimized, then the optimal sequence in which these jobs must be processed on the turning and grinding machines is a)A-D-E-F-H-C-G-B b)B-G-C-H-F-D-E-Ac)G-E-D-F-H-C-A-B d)A-E-D-F-H-C-G-BCorrect answer is option 'D'. Can you explain this answer?
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A set of jobs A, B, C, D, E, F, G, H arrive at time t = 0 for processing on turning and grinding machines. Each job needs to be processed in sequence-first on the turning machine and second on the grinding machine, and the grinding must occur immediately after turning. The processing times of the jobs are given below.If the makespan is to be minimized, then the optimal sequence in which these jobs must be processed on the turning and grinding machines is a)A-D-E-F-H-C-G-B b)B-G-C-H-F-D-E-Ac)G-E-D-F-H-C-A-B d)A-E-D-F-H-C-G-BCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about A set of jobs A, B, C, D, E, F, G, H arrive at time t = 0 for processing on turning and grinding machines. Each job needs to be processed in sequence-first on the turning machine and second on the grinding machine, and the grinding must occur immediately after turning. The processing times of the jobs are given below.If the makespan is to be minimized, then the optimal sequence in which these jobs must be processed on the turning and grinding machines is a)A-D-E-F-H-C-G-B b)B-G-C-H-F-D-E-Ac)G-E-D-F-H-C-A-B d)A-E-D-F-H-C-G-BCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A set of jobs A, B, C, D, E, F, G, H arrive at time t = 0 for processing on turning and grinding machines. Each job needs to be processed in sequence-first on the turning machine and second on the grinding machine, and the grinding must occur immediately after turning. The processing times of the jobs are given below.If the makespan is to be minimized, then the optimal sequence in which these jobs must be processed on the turning and grinding machines is a)A-D-E-F-H-C-G-B b)B-G-C-H-F-D-E-Ac)G-E-D-F-H-C-A-B d)A-E-D-F-H-C-G-BCorrect answer is option 'D'. Can you explain this answer?.
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