Quantitative Methods Used Most in Practice

1. Linear Programming (commonly used)
2. Integer Linear Programming  (commonly used)
3. Project Scheduling (PERT - Program Evaluation and Review Technique | CPM - Critical Path Method)
4. Simulation  (commonly used)
5. Decision Analysis
6. Forecasting  (commonly used)
7. Inventory Models
8. Waiting Line / Queueing Models
9. Markov-Process Model