BIM is a digital representation of physical and functional characteristics of a built asset that contains design, construction, operation, and maintenance information. It enables richer analysis than traditional processes by integrating large amounts of multi-disciplinary data throughout the asset's lifecycle. Productivity benefits of BIM include fewer errors, reduced rework, shorter project durations, lower costs, improved communication and understanding between stakeholders, and optimizing design decisions early when changes are cheap to make. Studies show BIM can reduce construction changes by 40% and project durations by up to 37% as users gain experience with the technology.