Originally posted by: Thaher

Hello, 

I have a set of  4 time  periods ( say 6 hour each)  which all together make a cycle for fluid storage tank (charging and discharging).

While it is easy to declare the periods 

dvar float+ I[Tanks][Periods];  //Inventory level of fluid stored at  tank installed at the end of period d

It was perplexing as to how to enforce in coding  that fluid inventory at the beginning of first period shall be equal to the inventory at the end of forth period knowing that my inventory variable defines level at the end of the period not its start. 

Any Suggestion please. 

Hi

what about

int d =4; // periods
range Periods = 0..d;
range Tanks=1..10;

dvar float+ I[Tanks][Periods];

subject to
{

forall(t in Tanks) I[t][0]==I[t][d];
}

regards

Originally posted by: Thaher

Hi, 

Thanks indeed.

This sounds convincing! my issue will be how to exclude period "0" from taking part into the objective function components and decision variable henceforth.

Is there a vehicle to do so, i.e to exclude  period 0 from any summation since I have 4 periods only and their related parameters are retrieved from excel as 4 cells size while they are currently declared as a range of 5 elements  0-d (d=4).

Thanking you,

Regards,

Originally posted by: Thaher

Does this suffice below as syntax correct. 

forall(d in Period : d!=0)  to exclude period 0. 

yes