Alright, here's the deal. I have to do a line utilization analysis. The database tells me when the call is generated, how long the call was, and which line was used. What I can't figure out is how to calculate what the minimum number of lines were required to make the same calls. So sample data would be: 5551212 1/1/3 12:00:00am 146 5551213 1/1/3 12:02:00am 30 5551213 1/1/3 12:04:00am 30 5551214 1/1/3 12:03:00am 46 5551214 1/1/3 12:07:00am 46 In this case only 2 lines are being used at one time. Now how do I do this for way more records?