OpenBuildings Designer, previously known as AECOsim Building Designer, is Bentley's comprehensive solution for multi-discipline building information modeling (BIM). It enables users to explore, innovate, and expedite the design and construction of buildings more efficiently than ever before. With the ability to design, analyze, document, and visualize structures of varying sizes and complexities, it enhances communication of design intent while overcoming obstacles between different building disciplines and teams located in different regions. The software empowers users to advance their building information modeling practices, leading to quicker project delivery and increased assurance in aspects such as design integrity, workflow efficiency, and overall productivity. By fostering collaboration among architects, mechanical, electrical, and structural engineers through a unified set of tools and processes, it streamlines project management. Furthermore, users can seamlessly integrate information from various formats and confidently tackle projects of all scales, ensuring that their design intentions are communicated clearly with customizable and dependable deliverables. This comprehensive approach ultimately transforms the building design process, making it more cohesive and effective.