The old saying necessity is the mother of invention "continues to be true, and a new machine, structure, system, or device is the result of that need. If the new device, machine, system, or gadget is really needed, people will buy it, providing it does not cost too much. Then, naturally, these questions may arise.Is there a wide potential market? Can this device or system be made available at a price that people are willing to pay? If these questions can be answered satisfactorily, then the inventor, designer, or officials of a company may elect to go ahead with the development of production and marketing plans for the new project or system.A new machine, structure, or system, or an improvement thereof, must exist in the mind of the engineer or designer before it can become a reality. This original concept or idea is usually placed on paper and communicated to others by the way of the graphic language in the form of freehand idea sketches. These idea or design sketches lead even more sketches, such as computation sketches, for developing the idea more fully. The Young EngineerThe engineer or designer must be able to create idea sketches, calculate stresses, analyze motions, size the parts, specify materials and production methods, make design layouts, and supervise the preparation of drawings and specifications that will control the numerous details of production, assembly, and maintenance of the product. In order to perform or supervise these many tasks, the engineer makes liberal use of freehand drawings. He or she must be able to record and communicate ideas quickly to associates and support personnel. Facility in freehand sketching, or the ability to work with computer controlled drawing techniques, requires extensive training in drawing with instruments and a thorough knowledge of the graphic language.A typical engineering and design department, many of the staff has considerable training and experience; others are recent gra...
