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Railways NTPC (Technical Ability) Production Engineering and Planning Question Bank Production Planning

  • question_answer
    A certain part is produced in a batch size of 50 units and requires a sequence of 8 operations in the plant. The average set-up time and average non-operation time per operation are3 hours and 7 hours, respectively. The average operative time per machine per part is 6 minutes. What is the manufacturing lead time?

    A) 100 hours                     

    B) 120 hours

    C) 150 hours                     

    D) 180 hours

    Correct Answer: B

    Solution :

    Average set of time per operation = 3 hours Average non-operation time per operation = 7 hours. Number of operation = 8 Average operative time per machine per part = 6 min Batch size = 50 Lead time \[8(3+7)+\frac{8\times 6\times 50}{60}\] \[=80+40=120\]hours.


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