Throwing out the lowest rated round should tighten up the SD, which in turn will get more scores tossed, which should, in effect, raise player ratings. Whew...
There's a slight inflation factor due to this change but almost imperceptable numerically. Remember that the bottom rated round excluded from the SD calc is only excluded from the final ratings calc if it still falls outside the 2.5SD/100 pt criteria. That happens for only about 1 in 50 players.
As far as doing the calcs for the PDGA, Roger Smith who lives near Joliet, IL and doesn't play PDGA events hardly at all is my partner that handles most of the data processing dirty work in MS Access. First, TD send their reports to PDGA HQ. They enter those into the PDGA database. Then they export a massive file to Roger. He does his thing using Access.
I'm the one who looks at each TD report and sets the course configurations each division plays semi-automatically into an Access file Roger provides for me that includes all of the new events to be processed for this ratings update. This is a key step that makes it unlikely we can just have ratings updates live online. There are too many errors and omissions in the TD report that need to be tracked down and corrected. I send that file back to him and he merges it with the overall database that goes back to 1998 when we started and processes the new ratings.
That file gets sent to Dave Gentry at PDGA HQ when ready. It's reviewed for errors offline using some test reports Roger produces that indicate potential problem ratings that fall outside some control boundaries such as a 10 yr old girl shooting a 1020 round. Once reviewed, then Dave uploads it into the live PDGA database and you see the new numbers.