Conceptual design is one of the earliest stages of product development, and is responsible for defining key aspects of the final product.The systematic approach addresses this stage by using a disaggregate model of product attributes and their corresponding geometries.This ultimately serves as a starting point for exploring conceptual proposals.Research into the emergence of various sketch typologies shows that they are labeled according to aim rather than technical utility.The proposed sketch-based model is intended to serve as a comprehensive version of the systematic model for conceptual design (Hernandis & Briede, 2009).Sketch outlines are used during various stages of the model in order to enable and visually assist with cognitive processes and decision-making during the initial theoretical stages, which are abstract and poorly defined.