Look Back Blocking Pseudo Code

For nlocation = 2 to look_back_factor

  For each decision

    If the decision is still possible

      If user specified region is blank

        Get the items in nLocation from the decision source region


        Get the items in nLocation from the user specified region

      End if

      If number of items in region > 0

      Get items in the tail location of the decision destination region

       If number of items in tail location > 0

           If attribute matches for items with user specified class

            Eliminate current decision

           End if

       End if

      End if

    End if

  Next Decision

Next Location

More information

Look Back Blocking.