This document discusses claims in construction projects. It defines a claim as a request for additional compensation or time extension due to occurrences beyond the contractor's control, such as differing site conditions or owner-caused delays. It notes that owners are liable for inaccurate data or design changes after contract signing. The document outlines common causes of claims and types of claims against owners and contractors. It provides tips for claims prevention including comprehensive documents and communication. Finally, it discusses variation orders and the sources and types of variations in construction projects.