CHAPTER 11 The Engineering Design Process
Technical graphics is an integral part of the engineering design process through which engineers and
drafters/designers generate new ideas and solve problems. Traditionally, engineering design consisted of
closely-related steps documented as paper graphics and text that flowed in a linear/sequential manner
through an organization. In the face of increased global competition, many industries in the United States
have adopted a team-oriented concurrent approach using 3-D CAD model information as a primary means
This chapter describes a modern approach to the engineering design process so you
will have a better understanding of and appreciation for the role of engineering graphics in the design
is the process of conceiving or inventing ideas mentally and communicating these
ideas to others in a form that is easily understood.
Most often the communications tool is
Design is used for two primary purposes: personal expression, and product or process
Design for personal expression, usually associated with art, is divided into concrete (realistic)
and abstract design and is often a source of beauty and interest.
When a design serves some useful purpose, such as the shape of a new automobile wheel, it is
classified as a design for product or process development.
is concerned with the look and feel of a product.
is concerned with the function of a product or process.
that a product possesses a form related directly to the purpose of that product.
is the process used to create new products, such as a new automobile model,
a new appliance, and a new type of wheelchair. Product design is a complex activity that
includes market, production, sales, service, function, and profit analyses used to produce a
product that meets the wants and needs of the consumer, is economically produced, is safe for
the consumer and the environment, and is profitable to the company.
is the process used to create a new system or process. A systems engineer or
industrial engineer is an engineer who specializes in designing systems. A system is an
orderly arrangement of parts that are combined to serve one general function.
11.2 ENGINEERING DESIGN
is a problem-solving process that uses knowledge, resources, and
existing products to create new goods and processes.
Engineering design has both aesthetic
and functional elements and can be broken into two broad categories: product design and
is one of the processes normally associated with the entire business or
enterprise, from receipt of the order or product idea, to maintenance of the product, and all
stages in between.
An engineering design involves both a process and a product. A
a series of continuous actions ending in a particular result. A
is anything produced as