Please explain the following terms:

1. Optimization
2. optimization Techniques
3. Decision Variables
4. Objective Function
5. Constraints
6. Planning Horizons
7. Sales and Operations Planning
8. Aggregate Operations Planning
9. Techniques for Aggregate Prodution Planning
10. Trial-and-Error
11. Yield Management
12. Disaggregating the Aggregate Plan
13. Linear Programming Model
14. Linear Programming Assumptions
15. Graphical Solution Method
16. Slack and Surplus
17. Simplex Method
18. Linear Programming Software
19. Sensitivity Analysis