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Design tools are objects, media, or computer programs, which can be used to design. They may influence the process of production, expression and perception of design ideas and therefore need to be applied skillfully.
New ideas can come by way of experimenting with tools and methods. Some designers explore ideas using pencil and paper. Others use many different mark-making tools and resources from computers to sculpture as a means of inspiring creativity. Traditionally, objects like pencil, compass, ruler, drawing triangle have been considered design tools and have been used to characterize design and designers. One reason for the success of traditional design tools such as pencil and paper is that these tools can be used without any special knowledge and their usage facilitates a continuous flow of thoughts.
The appropriate development and presentation tools can substantially change how an audience perceives a project. The media used for design can be divided in two categories, visual and verbal. Conventionally, in areas like architecture, industrial design, or graphic design, visual media are considered more important than verbal media. In other areas like engineering, the use of verbal design media may be prevalent.
Visual design tools are, for example, gesture, sketch, drawing, scale model, perspective drawing, photograph, film, video. Eugene S. Ferguson's 1977 paper in Science, entitled "The mind's eye: Nonverbal thought in technology", is credited for clarifying the role of visual reasoning in the thinking process. In this article he reasoned that "Thinking with pictures is an essential strand in the intellectual history of technological development." He concludes his article with the following statement:
In his work claims Ferguson that visual reasoning is a widely used tool used in creating technological artefacts. There is ample evidence that visual methods, particularly drawing, play a central role in creating artefacts.
Verbal design tools are, for example, metaphor, description, discussion, critique, theory, algorithm, calculation, program.
Computer programs have many functions which can be discussed in terms of design tools. One of the most widely used design tools is computer-aided design (CAD) software like Autodesk Inventor, DSS SolidWorks, or Pro Engineer which enables designers to create 3D models, 2D drawings, and schematics of their designs. CAD together with Digital Mockup (DMU) and CAE software such as finite element method analysis or analytic element method allows to create models of designs that can be analyzed without having to make expensive and time-consuming physical prototypes.
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