Week 5

Question 1

integer optimality increase

Answer 1

make the integers bigger and increases the problility of finding a recommendation

Question 2

SET THE INTEGER OPTIMALITY PERCENTAGE TO ZERO

Answer 2

to ensure that solver finds the true integer optimal solution

Question 3

making the INTEGER OPTIMALITY BIGGER

Answer 3

helps find the optimal solution

Question 4

network models

Answer 4

you never habe to include an integer constraint while shippingg

Question 5

netowrk models will always produce integer solutionas!

Question 6

Steps to solve network?

Answer 6

1. Do you need a dummy node? (are the supply and demand =?) if not you need a dummy node
2. set up the matrix for to/from & other matrices:
   - other matrices (costs/revenues, sometimes its in arc capacities, sometimes shipments as changing cells)
3. calc total inflows, total outflows, net supply (outflow-inflow)
4. add constraints to solver!

Question 7

Shortest path questions

Answer 7

• Source and sink node will have net supply of 1 and -1 (Thats all) the rest have 0
• capacities are not included (arcs that are infeasible or non existent have very large costs associated)