most of this can be solved by large written contracts or written out on a quote as something like "changes after PO issued will effect date of completion" or something like that.
NO.
Changes after PO is issued means new quote and new order plus cancellation charges.
I know it is just in time world but often you run this all and put it on the shelf for spaced deliveries.
Change something and you just bought all the stuff you no longer need.
The PO is contract between you and me to the print at the time of the PO acceptance.
Have been on both sides.
As a customer you find a oops on a print dimension to your supplier. You eat the parts and pay for them all.
Hopefully your supplier has not run them all yet on a big blanket. So then you ask for what is reasonable for time and material involved up to this point.
Opposite side as the maker.
What? A print change? No. This costs money, time and effort. We need to work this out or I will ship you a lot of useless parts.
You can not change the rules in the middle of the game.
