This should be cross referenced in such a manner as to make it easily accessible later in the project. Additional information is gathered during each of the core workflows. As the diagram above shows, the Gather Additional Information task is performed concurrently with the tasks which develop the work products. There are a wide variety of information gathering techniques that can be used. While all of these techniques can be appropriate in different situations, the first four and in particular interviewing and workshops are the most relevant.
Workshops always involve groups of people.
Workshops should be formally facilitated. It is important to be well prepared for both interviews and workshops. Time for preparation should be built into the project plan. Some research external to the enterprise being modelled can uncover useful information in the shape of industry best-practice models, papers and articles. Reviewed and approved work products must become subject to the organisation's change control procedures.