Architects took a sigh of relief when CAD software was introduced, this process was faster and more accurate and offered greater vision than the erstwhile 2-D design and drafting process. Now, 3-D BIM offers more versatility and efficiency to the building process, and it doesn?t end here. 4D BIM goes a step further facilitating accurate time scheduling, and 5D BIM makes it even better integrating design with estimates and helping you generate bills of materials (BOMs) and bills of quantities (BOQs). It allows you to accurately analyse/ calculate rates and assess the overall project cost even during design development stage. You are able to work in five dimensions- length, width, depth, time, and cost.