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In sequencing for minimizing mean tardiness and average in process inventory, the rules to be used respectively are
- a)SPT, EDD
- b)EDD, SPT
- c)EDD, LPT
- d)SPT, FCFS
Correct answer is option 'B'. Can you explain this answer?
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In sequencing for minimizing mean tardiness and average in process in...
**Explanation:**
The sequencing rules used in minimizing mean tardiness and average in-process inventory are **EDD** (Earliest Due Date) and **SPT** (Shortest Processing Time).
**1. EDD (Earliest Due Date):**
- EDD is a scheduling rule that prioritizes jobs based on their due dates.
- Jobs with earlier due dates are given higher priority and are scheduled first.
- This rule aims to minimize the mean tardiness, which is the difference between the job completion time and its due date.
- By scheduling jobs with earlier due dates first, the overall tardiness is reduced, leading to a lower mean tardiness.
**2. SPT (Shortest Processing Time):**
- SPT is a scheduling rule that prioritizes jobs based on their processing times.
- Jobs with shorter processing times are given higher priority and are scheduled first.
- This rule aims to minimize the average in-process inventory, which is the average amount of work in progress at any given time.
- By scheduling jobs with shorter processing times first, the overall processing time is reduced, leading to a lower average in-process inventory.
**Why EDD and SPT are the correct choices:**
- Minimizing mean tardiness and average in-process inventory are two different objectives in sequencing.
- EDD is effective in minimizing mean tardiness because it prioritizes jobs based on their due dates, ensuring that jobs with earlier due dates are completed first.
- SPT is effective in minimizing average in-process inventory because it prioritizes jobs based on their processing times, ensuring that shorter jobs are completed first and the overall processing time is reduced.
- Combining EDD and SPT as sequencing rules allows for a balanced approach, addressing both objectives simultaneously.
- EDD ensures that jobs are completed on time, reducing tardiness, while SPT ensures that jobs are processed quickly, reducing in-process inventory.
Hence, the correct sequencing rules for minimizing mean tardiness and average in-process inventory are **EDD** (Earliest Due Date) and **SPT** (Shortest Processing Time), which corresponds to option **B**.
The sequencing rules used in minimizing mean tardiness and average in-process inventory are **EDD** (Earliest Due Date) and **SPT** (Shortest Processing Time).
**1. EDD (Earliest Due Date):**
- EDD is a scheduling rule that prioritizes jobs based on their due dates.
- Jobs with earlier due dates are given higher priority and are scheduled first.
- This rule aims to minimize the mean tardiness, which is the difference between the job completion time and its due date.
- By scheduling jobs with earlier due dates first, the overall tardiness is reduced, leading to a lower mean tardiness.
**2. SPT (Shortest Processing Time):**
- SPT is a scheduling rule that prioritizes jobs based on their processing times.
- Jobs with shorter processing times are given higher priority and are scheduled first.
- This rule aims to minimize the average in-process inventory, which is the average amount of work in progress at any given time.
- By scheduling jobs with shorter processing times first, the overall processing time is reduced, leading to a lower average in-process inventory.
**Why EDD and SPT are the correct choices:**
- Minimizing mean tardiness and average in-process inventory are two different objectives in sequencing.
- EDD is effective in minimizing mean tardiness because it prioritizes jobs based on their due dates, ensuring that jobs with earlier due dates are completed first.
- SPT is effective in minimizing average in-process inventory because it prioritizes jobs based on their processing times, ensuring that shorter jobs are completed first and the overall processing time is reduced.
- Combining EDD and SPT as sequencing rules allows for a balanced approach, addressing both objectives simultaneously.
- EDD ensures that jobs are completed on time, reducing tardiness, while SPT ensures that jobs are processed quickly, reducing in-process inventory.
Hence, the correct sequencing rules for minimizing mean tardiness and average in-process inventory are **EDD** (Earliest Due Date) and **SPT** (Shortest Processing Time), which corresponds to option **B**.
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In sequencing for minimizing mean tardiness and average in process inventory, the rules to be used respectively area) SPT, EDDb) EDD, SPTc) EDD, LPTd) SPT, FCFSCorrect answer is option 'B'. Can you explain this answer?
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