Technical drawing, also known as drafting or engineering Design, serves as a visual language for conveying complex information related to designs, specifications, and instructions. It acts as a bridge between engineers, designers, and manufacturers, providing a detailed roadmap for the creation and realisation of products, structures, and systems.

A technical drawing provides a way for the entire production team to communicate, as well as being a means to visually describe a product design and all of its salient details. To use technical drawings effectively, specialist knowledge is required to understand the symbols, rules, and standards used.

Technical drawings are used in various fields, such as engineering, architecture, manufacturing, and construction. They help designers and engineers visualize their designs before building them. Technical drawings also allow for precise measurements when constructing objects or systems.

Technical drawings may comprise of orthogonal (2D) plans, elevations and sections, or exploded projections (3D). These can be drawn to scale manually or rendered using Computer Aided Design (CAD). The latest practice is to create 3D models of structures and components through Building Information Modeling (BIM) software.