Part Hold versus Unapproved Rev in 8.03

It seems as though, on the surface, that Part Hold and unapproving a Rev accomplish about the same thing...you cannot purchase the part or build a job for the part if it's on hold or the rev is unapproved.

Does anyone know if it's possible to place the part on Hold and have it prevent Quote/Sales Order entry by using the Part Hold checkbox, most likely by writing a BPM?

Sincerely,
Judy Havlik
Plitek, L.L.C.
judy.havlik@...