Hi all,   I am working on a set covering project where I am trying to locate facilities within a 25-minute distance from demand points. All destinations within 25-minutes of an origin were generated in GIS software external to SAS.    So really, right now what I have is: Facility IDs, Destination ID, Destination Population, Capacity. Simplified version would look like:   data have;    input originid destinationid pop10 capacity;    datalines; 1 1 15 22 1 2 5 22 2 2 5 22 2 3 17 22 2 4 4 22 3 3 17 22 3 4 4 22 4 2 5 22 4 4 4 22 ;   What I want would be for origin 1 and 3 to be selected since that covers all points 1-4 without exceeding the capacity of 22, while excluding origin id 2, since placement there would exceed 22, and 4, since 1 and 3 serve more while still covering each demand point. Overlap is okay.    At the end of the day, I'm starting to think this may be a data prep problem on my end. This is how I've been conceptualizing it, but I'm not sure if my have data set is telling the same story to the computer:   Thank you for your time.      ... View more