The Key Steps

Abstract

Having examined a particular example (the Christmas card list) in some depth, we are now in a position to review more closely the general principles mentioned at the beginning of Chapter 2. There we identified four steps that are common to the development of all computer information systems. This chapter therefore describes these four steps in some detail and in Chapter 4 we shall take two further down-to-earth examples to see how the approach is applied in practice. Here, then, are the four steps.