"This manual has two parts: the first looks at the aspects of a good manual. We argue that a good manual must have the right contents, to make it usable (right for the reader, and of good quality) and applicable (can be applied in the work of the user); it must have the right method, form and structure, to make it accessible; and the manual must be available when needed. Part II covers the process of testing. In testing, you need to know the strong and weak points of the manual itself, and to know if it is (or will be) available where it is needed. Thus the types of questions to ask and what they tell you are included. This part looks at when and where to test, and how to test manuals for non-literates. In the text, a number of examples are used. These are all fictional, although they are based on situations we have seen." (Introduction, page 4)