1-15. Storm doors have been installed on 50% of all homes in Anytown, USA. The remaining 50% of homeowners without storm doors think they may have a problem that a storm door could solve, but they’re not sure. Use Activities 1, 2, and 3 in the engineering design process (Table 1-1) to help these homeowners systematically think through the definition of their need (Activity 1), a formal statement of their problem (Activity 2), and the generation of alternatives (Activity 3). The design process begins in Figure P1-15 with a statement of need and terminates with the specifications for a means of fulfilling that need.