"Bill Denton" wrote in message et...
: "Backlog" generally refers to an inability to deliver orders at the promised
: time.
:
: If someone ordered an airplane from Eclipse and were told it would be
: delivered in January 2009 it would not be consider "backlogged" today...
:
:

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On time delivery - delivering the product at agreed to time
Backlog - orders on the books not yet delivered