Hi all,

I need some help in developing a constraint for opening and closing of depots.

say for an example, I have operations period of 5 years and 3 depots. I want to develop a constraint in which 2 depots are opened on all the 5 years and 1 depot should be opened on first 3 years and on the 4th and 5th year, it should be closed. In general, the logic should be once the depot is closed, it should be closed forever. Ideally the result should be

Name Year 1 Year 2 Year 3 Year 4 Year 5

Depot1 Open Open Open Open Open

Depot 2 Open Open Open Open Open

Depot 3 Open Open Open Closed Closed

Right now, my constraint looks like this

Please advise me how I should modify to get the results as I mentioned. For your reference, I have attached my code.

Many thanks!