5. Mistakes to avoid

5.1 Don't lock yourself in

• Get rid of your own view of things: analyzing what's behind the cards can reveal who the protagonists are in a given situation. Don't forget that the information in question is confidential, so discretion is essential.

• In addition, you'll want a scalable map that allows you to vary the fields and types of information to be filled in.

• Finally, don't draw any conclusions without cross-checking your information at least three times.