Also, some construction contracts have a bonus structure built-in. Deliver on time and on budget get a bonus, delay of the project the construction company must pay a penalty. Now there are also clauses that states verbiage regarding Acts of God, weather and etc.
Dorney Park has a wristband system where you can load money and us it to pay for food and merchandise. I believe Dorney Park was the Guinea pig in seeing if this program would work and how the General Public would react to it.