Job on hold – no purchase order!

Take a look at this link:

Here, in a few words, is one of the major reasons to use ODB++. Very clearly articulated by Mitch (thanks!). But don’t forget the purchase order to your manufacturer as well; most manufacturers will expect to be paid……. ODB++ carries a lot of value, but it does not carry actual money…!

Apart from lack of money, what other reasons are there for having a job go “on hold” at the manufacturer?