How much does the expected reader already know on the subject? This is required to get a perspective of the technical level of the audience we are addressing and the amount of assumptions that we can make. Also, it might appear offensive and patronising if you are explaining the most obvious in great detail.
How much does the average reader want to know? Some readers are naturally satisfied with the basic information while others feel at control only when they have understood the topic at a great detail. It is essential to strike a balance such that the needs of both types of readers are met.
What are the hot topics in the subject? This refers to the topics that the reader would value the most in the entire subject. It also refers to topics that are a foundation for the other topics and are the most basic concepts required to understand the subject.
Is there any prerequisite information that the reader would need before understanding this subject? For example: If you are writing a manual on the topic 'Using Microsoft Word', it might be a good idea to explain the purpose of any authoring tool.
How deep are you planning to go in explaining each concept or topic? The depth you decide should be consistent throughout your manual. In addition, if you think that there would be readers who would be interested in more depth, you can provide alternatives like the ones given below:
- Have two different manuals; one that would deal with the subject at a superficial level and the other at a deeper level.
- Provide links at required locations within chapters that would take the user to chapters where indepth information is available.
- Cover basic information in the initial chapters and detailed information later.