It has since reduced its backlog. In 2017 the company had an order backlog of 11.4 billion US dollars. Despite the reduced backlog, Boeing officials expressed optimism that additional orders would be forthcoming. These continuous applications pile onto the backlog. It is believed the backlog has now been reduced. This crash created a backlog of over 20,000 cases. December 2012 data showed that there was 597,579 unexamined patent application backlog. Operator commands are available to change both the backlog and execution priorities of runs. In 2007, 1.38 million people applied for citizenship creating a backlog. By late the following year, Taft was able to show that the backlog was shrinking. The report message contains a logarithmic measure of the backlog in the T-CONT queue. The product owner prioritizes product backlog items based on which are needed soonest. Production began immediately to fill the order backlog. The backlog of education and training is still immense. Such a PBI may be used in a Scrum or Kanban backlog or XP project.