Changing Requirements with Fixed Price Contracts

Name: Changing Requirements with Fixed Price Contracts
Type: Rules
Status. Finished
Version: 2007-05-23

Gist: A way of changing requirements even if a fixed price contract has beed agreed upon.

R1: The total effort does not change.
R2: The customer has to specify each change to a level of detail which is suitable for being estimated
R3: The supplier estimates the change, yielding an effort of X.
R4: The customer has to exclude not yet developed requirements from the contract with the same value X.
Note: This is based on mutaul trust. If you need an extrodinary complicated or hard to agree to contract, you should probably don't try this.