AutoCAD is a computer-aided design software developed by Autodesk company. It allows drawing and editing digital 2D and 3D designs more quickly and easily than by hand. AutoCAD is a global application. It is being used globally by product development teams, manufacturing facilities, medical professionals, in educational institutions, by professionals and engineers. AutoCAD helps the user to develop, modify, and design better infrastructure, deliver scalable and feasible building assignments, supervise production finances, and foresee project results.

SketchUp is a 3D modeling program that allows you to create 3D models of whatever you want. You can make anything from a house to a car to a human or animal. SketchUp has many different applications, including architectural design, manufacturing, and even game design. While SketchUp is mainly used for creating 3D models, some users have found ways to create animations and interactive models in this program.

An estimate for any construction work may be defined as the process of calculating the quantities and costs of the various items required in connection with the work.

Before the start of any work for its execution, the owner of the builder should have a thorough knowledge of the volume of work. The minutest details can help him understand if the work can be completed within the stipulated time frame and budget. It also enables him to understand the probable cost that may be incurred to complete the proposed work. Therefore, it is necessary to list the probable costs or develop an estimate for the proposed work from its plans and specifications.