Contents - Index


Pairing Analysis (PA) Screen Overview

Pairing Analysis is simply the process of finding the pairings (pairings or rotations) you prefer and want BC to use to build possible schedules.  There are two screens in Bid Central to enable you to quickly find the pairings you like- the PA Screen and the Layover Analysis Screen.

The Pairing Analysis Screen is designed to quickly find the pairings you desire by offering a myriad of selection criteria you can use to drill down to your most preferred trips.   To find the pairings you want, click on whatever selection criterion that is important to you and then choose the operators within that criteria.  As you change criteria, BC will automatically update the number of pairings which match your criteria. .   This immediate feedback gives you a powerful way to know if your selection criteria is either too liberal or too restrictive.  To actually see the pairings themselves,  press the [Show Matching Pairings] button, and Bid Central will show all pairings that match the criteria you have specified.




In the above screen shot, the selection criterion is trips "between 3 and 5 days" that have only "one segment on the first and last day", and have a longest sit time less than or equal to 2:30.   64 Pairings match this selection criteria.  If you click on the screen shot you will go to a page describing the selection criteria and functions.

PA Screen Join Operators



You can specify how you want the criteria "joined" when Bid Central searches the pairings.  You do this by selecting either "AND" or "OR" in the "Select Using" box. The default is to "AND" each major criteria with the other.  But if you select "OR", Bid Central will join the major criteria using the "OR" operator.  Using "AND" means that all criteria must match.  Using "OR" means that any matching criteria will do.

Within the categories "Trip Departure Days" and "Layover Cities" the selections are "ORed" together.  After that,  pairings matching any of the choices are then joined with the other criteria you've selected using "AND" or "OR" (depending upon the join operator you've selected) .

Understand that if you use the "OR" join operator, you could get what appear to be conflicting results.  For example, if you select "Trip Length = 5 Days" and "Layover City..LGA..Avoid", BC could still show matching pairings with an LGA layover because all 5-day trips match the first half of the "OR" join regardless of the layover cities within those trips.

The Pairing Analysis Selection Calendar



The selection calendar gives you two mutually exclusive options for pairing selection:  Dep Days and Exclusion.  If you check one, the other choice will be disabled.  To enable the other choice you must uncheck the other as shown in this series of images.  



As you can see, when either choice is checked, the other choice is disabled.  Checking either choice enables the calendar in the selection mode you checked.  Remember that when selecting pairings, BC combines the results from this choice  with any other choices you select using the "join operator" that is active.  Now I will describe the function of each option.
  • Dep Days

    Think of "Dep Days" as pairing departure days.  When you check "Dep Days", the days in the bid month are activated on the mini-calendar.  Any enabled day you click will toggle a day as active, meaning that BC will search for pairings which depart on that day.  You can toggle entire day of week rows (DOW) by clicking on the DOW you want to toggle.  For example, clicking on "M" will toggle all Monday dates for that bidmonth.   If you check "Trip Departure Days" without selecting any days in the month, no pairings will ever match.  The screen shot below shows Monday and Tuesday departure days selected:



    Note:   When you select pairings based upon trip departure day, BC will NOT deselect the other trip operating days when you view matching pairings.  You can always manually select only the trip operating days that you want in the matching pairing window.
  • Exclusion

    Exclusion dates are analogous to "Days Off" in the Ramjet Schedule Generator.  They are days you do not want pairings to touch.   You select or de-select an exclusion day by clicking on that day.  Only the days in the bid month are enabled to click. Any exclusion date that you select will eliminate all pairings in which any part of the pairing touches that date.  But it's not quite that smiple because many pairings operate on more than one date.  So BC will eliminate any pairing operating date which results in a conflict with the Exclusion date you set.  If there are other pairing operating dates which do not conflict, those pairing op dates will be selected while the conflicting ones are de-selected.  You can see this in the "Selected Pairings Screen" when you select "Show Matching Pairings".  If all of the pairing op dates create a conflict, that pairing will be eliminated from the "selected" list.

    In the screen shot below, May 12-16 are selected as pairing exclusion dates.  Any pairing which touches those dates is excluded from the selected pairings.



    You can see how this effects the results in the "Matching Pairings Window" as shown below when only one day trips are also included in the selection criterion.



    Notice that in the above screen shot, the one-day pairing 4039 is selected and the pairing op dates of the 12th and 14th have been excluded from the selection because they would cause the pairing to conflict with the selected exclusion dates.  This is a simple case for illustration because the trip length is only one day so the op dates and exculsion dates match exactly.

    You can clear all selections you have made in either the "Dep Days" or "Exclusion" mode by right clicking over the selection mode.  If you clear all Exclusion dates, BC will automatically restore any Trip Operating Dates that were previously de-selected.  (You will be able to tell this happened as the [Reset All Op Days] button will be disabled indicating that all op days for all trips have been enabled.  Bid Central will also save and restore any active selections you make, just as it will any other selections in the PA Screen.  If you deselect an option and then re-select it, the previous selections you made will be preserved.   BC will save the day of month selections but remember that from month-to-month, those selections won't map to the same day-of-week.

    Search Scope

    The Search Scope allows you to select the trips subset you want to do searches against.

    The scope choices are "ALL", "BM" ( "Bookmarked"), and "! BM" ('NOT Bookmarked).  There are many ways to use the new scope selection but the most significant is when doing Jr Trip analysis.  Once you load Jr Trips, they are the only ones that are bookmarked.  So if you do searches on "Bookmarked" trips in the PA screen, you can get a great idea of the selection criteria that will find the trips available at your seniority when you bid.  Searches on "Bookmarked" trips will also only search for trips that are marked as operating on a given day (as opposed to all possible operating days).  The default trip search scope is always "ALL".  The scope is never saved with your other preferences and you will have to explicitly set it to something other than ALL anytime you open the PA screen.

    When returning from the "Selected Pairings" screen, you can immediately update your matching pairing display by clicking on the text lable "Scope".  This is useful only if your search scope is either "BM" or "! BM".

    Clearing Bookmarks

    If you want to "Clear" any Bookmarks you have previously set, press the .  After you press this button BC will ask you to confirm that you want to clear them so you don't accidentally elimate the bookmarks you've previously set.



    Note:  If no bookmarks are set, will be disabled, so after clearing bookmarks it will be disabled until you set some as shown.

    Click this link for detailed  information on the PA selection criteria and functions.

    Click this link for information about saving and recalling different sets of selection criteria in the PA screen.

    Click this link to learn how to set "Avoids" in the PA screen.