o In the beginning the particular need to be satisfied may be quite well-defined o Here are two examples of well-defined needs 1. How can we obtain large quantities of power cleanly, safely, and economically without using fossil fuels and without damaging the surface of the earth? 2. This gearshaft is giving trouble; there have been eight failures in the last six weeks. Do something about it⚫ In the beginning the particular need to be satisfied may be quite well-defined． ⚫ Here are two examples of well-defined needs． ⚫ 1. How can we obtain large quantities of power cleanly，safely，and economically without using fossil fuels and without damaging the surface of the earth? ⚫ 2 ．This gearshaft is giving trouble；there have been eight failures in the last six weeks．Do something about it．