System requirements document provide the technical team with "specific information" Module X will create a new list of users and populate the "seat database table" with "VIP" , "Economy", "Standard" travelling information. This is just one example, many requirements can be created from one idea, - fact-finding, focus groups can all use to capture the correct information. Key here for the business analyst is to probe the business for more information, ask them to expand on the idea. Business Analyst will need to review always the constraints and liase strongly with PM and development team.