Tom,
we are not a very big factory, because we have about 150 seats of Windchill and a little bit more of 50 Creo.
But when we renewed our three years maintenance agreement with PTC, we also have planned a list of possible developement project on Windchill.
For this project we are required to buy some SW, so we discuss with PTC about buying SW and have less maintenance to pay.
Depending on how much SW we could buy, PTC have proposed us three different amount of discount.
Then it was all about negotiation.