This AACE International recommended practice (RP) defines a generic approach to the development of a scheduling specification. The purpose of this RP is to describe the basic structure and provide the minimum topics and associated requirements that should be addressed when preparing a schedule specification – without getting into specific details. This RP was developed to be used as a guide when developing or revising scheduling specifications. It also provides example language for specific topics that should be addressed in any specification. Additional details on the topics and requirements listed in this document are covered in the referenced RPs. This RP does not focus on a particular scheduling methodology; however, certain scheduling methodologies may necessitate specific and/or different requirements.