Originally Posted by Hrkdrivr

PBS Gouge:

Secondary Line Generation (SLG)

There is one final method that PBS will employ if necessary to award a line from a Pairings bid group, Secondary Line Generation, SLG. SLG looks at any pairings that are not awarded to senior pilots to find any combination that will make a legal line without regard for your preferences. There are some limitations. For example if the only combination of pairings has Christmas off and pilots senior to you have to work Christmas, SLG will not award the line. While SLG sounds very bad, remember that PBS will only use SLG after exhausting multiple completion attempts. It is a last desperate attempt to award a line as opposed to a simple ignoring of your preferences. Generally, this only occurs towards the very bottom of the regular line pilots where the available pairings are very sparse. In June 2009 there were 9 SLG’s out of 5064 regular lines.