It's been mentioned often, both on this forum and others.Perhaps it is more accurate to call it pessimistic locking rather than semaphore if it wraps the entire editing experience. What is the critical need to queue data entry clerks- apart from the decision not to use change tracking?
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1