Sigma is a construction estimating software that has been expertly crafted by estimators for estimators, ensuring both accuracy and user-friendliness. Designed to mimic the layout and functionality of a standard Excel spreadsheet, it incorporates a robust hierarchical structure along with custom templates and smart assemblies, allowing users to create estimates swiftly without encountering issues with broken formulas. Furthermore, Sigma provides a flexible breakdown structure that can be tailored to suit various project needs and estimation formats. The intuitive drag-and-drop feature enables users to effortlessly rearrange estimates or incorporate items from similar projects. Additionally, Sigma simplifies the process of accessing cost databases, offering quick inline search options and straightforward browsing for resources such as RSMeans and BNI Cost data. Users can also generate their own cost databases using historical data or elements from commercial cost sources, enhancing the software's adaptability and utility. Overall, Sigma stands out as an innovative tool that streamlines the estimating process while accommodating the unique needs of its users.