The document outlines various job sequencing priority rules for manufacturing, including First-Come-First-Served (FCFS), Shortest Processing Time (SPT), Earliest Due Date (EDD), and Longest Processing Time (LPT). It compares the effectiveness of these rules, indicating that SPT is superior in most measures while LPT is the least effective. A video link is provided for further clarification of the concepts discussed.

1. SEQUENCING JOBS
Job
Job Work
Time
(Days)
Due
Date
(Days)
A 6 8
B 2 6
C 8 18
D 3 15
E 9 23
FIRST COME FIRST SERVED
SHORTEST PRECESSING TIME
LONGEST PROCESSING TIME
EARLIEST DUE DATE
HINDI
URDU

2. Sequencing and Priority Rules
There are priority rules to carry out the jobs especially applicable for process-focused facilities and
manufacturing job shops. Below are the priority rules;
• FCFS: First come, first served.
• Jobs are completed in the order they arrived.
• SPT: Shortest processing time.
• Jobs with the shortest processing times are assigned first.
• EDD: Earliest due date.
• Earliest due date jobs are assigned first.
• LPT: Longest processing time.
• Jobs with the longest processing time are assigned first.
Sequencing is Determining the order in which jobs should be done at each work center.

3. Performance Criteria
•

4. Problem Solution
Job
Job Work (Processing)
Time (Days)
Job Due Date
(Days)
A 6 8
B 2 6
C 8 18
D 3 15
E 9 23
The FCFS sequence shown in the next table is simply A–B–C–D–E.

5. FCFS Rule

6. SPT Rule
Job
Job Work (Processing)
Time (Days)
Job Due Date
(Days)
A 6 8
B 2 6
C 8 18
D 3 15
E 9 23

7. EDD Rule
Job
Job Work
(Processing) Time
(Days)
Job Due Date
(Days)
A 6 8
B 2 6
C 8 18
D 3 15
E 9 23

8. LPT Rule
Job
Job Work (Processing)
Time (Days)
Job Due Date
(Days)
A 6 8
B 2 6
C 8 18
D 3 15
E 9 23

9. FCFS vs SPT vs EDD vs LPT
LPT is the least effective measurement for sequencing. SPT is superior in 3 measures, and EDD is
superior in the fourth (average lateness).

10. THANKS
Watch complete video clearing all concepts mentioned above;
• https://www.youtube.com/watch?v=HTEdlvag2SQ