Design
Design is the creation of a plan or convention for the construction of an object, system or measurable human interaction (as in architectural blueprints, engineering drawings, business processes, circuit diagrams, and sewing patterns). Design has different connotations in different fields (see design disciplines below). In some cases, the direct construction of an object (as in pottery, engineering, management, coding, and graphic design) is also considered to use design thinking.
Engineering
Engineering is the creative application of science, mathematical methods, and empirical evidence to the innovation, design, construction, operation and maintenance of structures, machines, materials, devices, systems, processes, and organizations. The discipline of engineering encompasses a broad range of more specialized fields of engineering, each with a more specific emphasis on particular areas of applied mathematics, applied science, and types of application. See glossary of engineering.
Process
A process is a set of activities that interact to achieve a result.
Process Engineering
Process engineering focuses on the design, operation, control, optimization and intensification of chemical, physical, and biological processes. Process engineering encompasses a vast range of industries, such as chemical, petrochemical, agriculture, mineral processing, advanced material, food, pharmaceutical, software development, automotive, and biotechnological industries. The application of systematic computer-based methods to process engineering is "process systems engineering".
Engineering
Engineering: The art of organizing and directing men, and of controlling the forces and materials of nature for the benefit of the human race.
Henry Gordon Stott. Presidential address, 1908, to American Institute of Electrical Engineers. Cited in: Halbert Powers Gillette (1920) Engineering and Contracting. Vol. 54. p. 97
Design
Design is redesign.
Jan Michl (2002), in "On seeing design as redesign" (Scandinavian Journal of Design History 12, 2002: 7-23.)
Design
Disguise and complication are hindrances, both to good construction and good design, and as complication and disguise are expensive and wasteful... the interests of good art and true economy run on parallel lines.
Ernest Flagg, Small Houses: Their Economic Design and Construction (1922)