A program in Java to simulate and report the wait times of a car wash’s business with standard and upgraded equipment.
Created for the Project #2 Car Wash Simulation at Kalamazoo College.
- Simulate days of business at both 3 and 4 minutes per wash.
- Track how long cars have been waiting for their wash.
- Track how many cars have been waiting longer than 10 minutes.
- Report these data for both base equipment (4 min/wash) and upgraded equipment (3 min/wash).
- Events, such as car arrivals and washing, happen every minute.
- The car wash is open for 10 hours / 600 minutes.
- Every minute, cars have a 1 in 4 chance of arriving at the car wash.
- The simulation will not end until cars waiting in line are washed, but cars cannot arrive after closing.
An output.csv as a table created by the CarWashApplication main method:
| Day | Base Average Wait | Base # Cars With Long Wait | Upgraded Average Wait | Upgraded # Cars With Long Wait |
|---|---|---|---|---|
| 1 | 14.64 | 98 | 2.46 | 4 |
| 2 | 10.02 | 51 | 1.78 | 0 |
| 3 | 8.58 | 62 | 3.26 | 2 |
| 4 | 4.36 | 15 | 2.43 | 7 |
| 5 | 13.70 | 69 | 2.20 | 3 |
| 6 | 22.51 | 131 | 2.70 | 12 |
| 7 | 27.44 | 129 | 1.76 | 3 |
| Average | 14.46 | 79.29 | 2.37 | 4.43 |
The following is an example console output from the CarWashApplication main method:
===================================
TRIAL 1: 4 minutes per wash
===================================
--- Day 1 Simulation (4 minutes per wash) ---
Simulation complete. Time elapsed: 635 minutes.
Cars washed: 155.
Total wait time: 2269 minutes.
Average wait time: 14.64 minutes.
Cars that waited at least 10 minutes: 98.
--- Day 2 Simulation (4 minutes per wash) ---
Simulation complete. Time elapsed: 612 minutes.
Cars washed: 140.
Total wait time: 1403 minutes.
Average wait time: 10.02 minutes.
Cars that waited at least 10 minutes: 51.
--- Day 3 Simulation (4 minutes per wash) ---
Simulation complete. Time elapsed: 614 minutes.
Cars washed: 148.
Total wait time: 1270 minutes.
Average wait time: 8.58 minutes.
Cars that waited at least 10 minutes: 62.
--- Day 4 Simulation (4 minutes per wash) ---
Simulation complete. Time elapsed: 606 minutes.
Cars washed: 129.
Total wait time: 562 minutes.
Average wait time: 4.36 minutes.
Cars that waited at least 10 minutes: 15.
--- Day 5 Simulation (4 minutes per wash) ---
Simulation complete. Time elapsed: 643 minutes.
Cars washed: 151.
Total wait time: 2069 minutes.
Average wait time: 13.70 minutes.
Cars that waited at least 10 minutes: 69.
--- Day 6 Simulation (4 minutes per wash) ---
Simulation complete. Time elapsed: 637 minutes.
Cars washed: 158.
Total wait time: 3556 minutes.
Average wait time: 22.51 minutes.
Cars that waited at least 10 minutes: 131.
--- Day 7 Simulation (4 minutes per wash) ---
Simulation complete. Time elapsed: 632 minutes.
Cars washed: 154.
Total wait time: 4226 minutes.
Average wait time: 27.44 minutes.
Cars that waited at least 10 minutes: 129.
===================================
TRIAL 2: 3 minutes per wash.
===================================
--- Day 1 Simulation (3 minutes per wash) ---
Simulation complete. Time elapsed: 603 minutes.
Cars washed: 141.
Total wait time: 347 minutes.
Average wait time: 2.46 minutes.
Cars that waited at least 10 minutes: 4.
--- Day 2 Simulation (3 minutes per wash) ---
Simulation complete. Time elapsed: 602 minutes.
Cars washed: 141.
Total wait time: 251 minutes.
Average wait time: 1.78 minutes.
Cars that waited at least 10 minutes: 0.
--- Day 3 Simulation (3 minutes per wash) ---
Simulation complete. Time elapsed: 602 minutes.
Cars washed: 165.
Total wait time: 538 minutes.
Average wait time: 3.26 minutes.
Cars that waited at least 10 minutes: 2.
--- Day 4 Simulation (3 minutes per wash) ---
Simulation complete. Time elapsed: 601 minutes.
Cars washed: 129.
Total wait time: 313 minutes.
Average wait time: 2.43 minutes.
Cars that waited at least 10 minutes: 7.
--- Day 5 Simulation (3 minutes per wash) ---
Simulation complete. Time elapsed: 601 minutes.
Cars washed: 138.
Total wait time: 303 minutes.
Average wait time: 2.20 minutes.
Cars that waited at least 10 minutes: 3.
--- Day 6 Simulation (3 minutes per wash) ---
Simulation complete. Time elapsed: 602 minutes.
Cars washed: 145.
Total wait time: 392 minutes.
Average wait time: 2.70 minutes.
Cars that waited at least 10 minutes: 12.
--- Day 7 Simulation (3 minutes per wash) ---
Simulation complete. Time elapsed: 606 minutes.
Cars washed: 149.
Total wait time: 262 minutes.
Average wait time: 1.76 minutes.
Cars that waited at least 10 minutes: 3.