A change order log is a running register of all change orders on a project — showing CO number, date, description, cost impact, schedule impact, status (pending/approved/rejected), and cumulative running contract total for every change order. The log is the document that explains why the project cost differs from the original contract value. If a project started at $450,000 and the current authorized value is $518,000, the change order log itemizes the $68,000 difference through every specific scope decision that was made and authorized. RainFire Builders maintains a current change order log on every project and includes it in the monthly project documentation — so the client always knows what the current authorized project cost is and what decisions produced that number.