⚙ Controls
1 Pick a rule below and hit Apply
2 Compare the metrics on the right
3 Switch to Manual and drag rows to beat it!
📋 Job Queue
| Job | Proc. Time | Due Date | Slack |
|---|
💼 Interview Tip
SPT/SOT minimizes average flow time — this is a classic exam & interview question. But SPT can starve long jobs, so real shops often combine it with a lateness cap. EDD minimizes maximum lateness. Be ready to explain when each rule is best and the trade-offs involved.
Instructor Notes
- SPT minimizes average flow time and average WIP (Little's Law). EDD minimizes maximum lateness.
- Have students screenshot their best manual schedule and explain the trade-offs.
- Click New Jobs for fresh data sets; race in pairs for lowest average lateness.
- Ask: Why might a bank use FCFS even though SPT is "optimal"? (Fairness!)
📊 Schedule (Gantt)
Total Flow Time
–
Avg Flow Time
–
Avg Lateness
–
| Order | Job | Proc. | Start | End | Due | Flow | Late |
|---|
💡 What does this rule do?
Select a rule and hit Apply to see how it works.