Sketching communicating ideas

Freehand technical sketching can be used to quickly and accurately communicate ideas and concepts. 

Almost every method, from the most dense and formal ones to those based on the most loosely defined sketches and drawings, stakes a claim to being abstract. The formal ones have a precise idea of what kinds of things are omitted in the abstraction and exactly what it means to correctly implement that abstraction they also share our idea of a conformance relation with a justification Refinement is a well-established technique in the formal methods community. The ideas of protocol refinement and data reification (model or state refinement) have been separately but quite thoroughly worked out elsewhere. 

Three-dimensional sketching is the quickest way to convey ideas to others. It also is the least likely method to create misunderstanding. Remember from Chapter 4 clear communication is most important to the design process. 

Freehand working drawings or sketches are another important way in which we communicate our ideas. The drawings of the spring toggle bolt in Fig. 3.67 were done from freehand sketches. A freehand sketch may be done as an initial draft of an idea before a full working drawing is made. It is often much easier to... 

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