A Cost Estimate and Schedule Data Sheet is a document that contains estimated costs and a schedule for a project. It can be used as a tool to track progress and budgeting during a project. There are three types of Cost Estimate and Schedule Data Sheets: 1. Preliminary Cost Estimate and Schedule Data Sheet: This type of data sheet is used to provide an early estimate of costs and timing for a project. It is typically used before the project’s scope and design is finalized. 2. Definitive Cost Estimate and Schedule Data Sheet: This type of data sheet is used to provide a more accurate estimate of costs and timing for a project. It is typically used after the project’s scope and design is finalized. 3. Revised Cost Estimate and Schedule Data Sheet: This type of data sheet is used to update a project’s cost and timing estimates as the project progresses. It is typically used to ensure that the project is staying within its budget and timeline.