Our client had a contract to supply cogenerated power to the local utility. One year, the utility requested a refund, claiming that the client had not met the reliability standard in the contract. Our analysis showed that the customer had met the reliability criterion according to the terms of the contract, although the contract itself used a non-standard definition of reliability. Further, we showed that the utilitys meters were not sufficiently precise to support its claim. The case was settled on terms completely satisfactory to our client.