Gathering Your Specific OSS Requirements (PAOSS-PRE-03)

Do you have the task of gathering the list of requirements for an upcoming OSS/BSS project? You know the rest of your project will be measured against the OSS/BSS requirements you gather. Do you already have a list of requirements in mind before you start discussions with your stakeholders? Are you worried there will be other important requirements that you overlook? Are you worried about how to prioritise the requirements you capture, as you know some will be essential, whilst others will be optional or wish-list items at best.