{//% unless portal.user.is_agent %} Tickets
Login Submit a Ticket News {//% endunless %}


Substitution replaces a pairing(s) awarded from a higher bid preference with a pairing(s) that match the same higher bid preference in order to fit pairings from a lower bid on the block. Many pairings may match a specific bid preference, so substitution is used to try different combinations of matching pairings.

For example, if the N-PBS Scheduler is trying to fit a pairing on the block that matches bid preference 3, but the pairing conflicts with a pairing that matches bid preference 1. The N-PBS Scheduler may try to substitute the pairing matching bid preference 1 with another pairing that also matches bid preference 1, but starts on a different day and doesn’t conflict with the pairing that matches bid preference 3. Substitution allows the N-PBS Scheduler to successfully fit pairings that match both bid preferences on the block.

Did you find it helpful? Yes No

Send feedback
Sorry we couldn't be helpful. Help us improve this article with your feedback.