When you should put a matter into your matter management system

You do have a matter management system, right?

Put a matter into it when (1) it is likely to generate a legal fee paid to a law firm or vendor, (2) the matter could be political or sensitive, (3) work done on the matter might be usable by someone else in the law department on a later matter, (4) any service of process is involved, or (5) more than ten hours of inside lawyer time are likely to be spent on it.