How many pages are required in the Feasibility Study, User Documentation, etc.?
The length of a document should be whatever length is required to accomplish its purpose and to demonstrate your skills/knowledge. As the author of the document, you have a better knowledge of what is required than anyone else. As long as the document does not contain “fluff”, “puff” or “filler”, its length is inconsequential. The only caution I offer is to ensure that the document is concise and succinct. Put yourself in the position of a novice who knows nothing about the activity and “tell” him/her (in language they will understand) what they need to know to use/maintain the system.