This paper is a study on the importance of drawing (both formal drafting and informal sketching) during the process of mechanical design. Five hypotheses, focused on the types of drawings, their necessity in mechanical problem solving, and their relation to the external representation medium, are presented and supported. Support is through referenced studies in other domains and the results of protocol studies performed on five mechanical designers.The resulting data is supportive of the hypotheses. These results also give requirements for future computer aided design tools and graphics education, and goals for further studies. that is why Engineering Graphics is important for mechanical engineers,Engineering Graphics subject is not like other subject for knowledge, it is basic for us
Engineering Drawing are more than just pictures drawing. It is very important for engineering student for it is also a language. Most specifically, it communicates all needed information from the engineer point of view who designs a part of the machine to the workers who will make it.