Originally posted by: Shawn1

I have a scheduling optimization problem where available times for machines are between 8:00 AM and 5:00 PM Monday through Friday. I need to write union of following constraints as available time (in minutes) using OPL language but not sure if logical operator (||) does the job for me . Any guide is really appreciated.

0<=t<=540   

1440<=t<=1980

2880<=t<=3420

4320<=t<=4860

5760<=t<=6300

Hi

yes if t is a dvar you may write in the subject to block

(0<=t<=540   ) ||

(1440<=t<=1980) ||

(2880<=t<=3420) ||

(4320<=t<=4860) ||

(5760<=t<=6300);

But there may be a better linear way as t being the sum of a number between 0 and 540 and 1440 multiplied by a int between 0 and 4

regards

Originally posted by: Shawn1

Thanks Alex for your guide.