[ajcronk]

Has anyone seen a Sales CRM implemented with a temporal+value approach? Seems quite useful for tracking movement through a funnel.

[mahmud]

You can use a stock rdbms and still keep track of changes. Just keep a seperate "Updates" table which consists of the tuple {class, object, change-description, changed-when, changed-by}

You don't need both class and object, but I prefer to log both object type and id.

[jcromartie]

Anything that touches financial records-keeping would be ripe for this kind of software, too. I spent quite some time on a financial services system and our number one enemy was mutable state.