When an action type component within a Business Rule (i.e. Set Visibility, Set Business Required, etc.) references a field that is not present on the form or is removed from the form, it will activate without warning or error and the field can be removed without warning or error. This not only causes that business rule to fail to fire, but it can have a cascading effect causing multiple business rules to not fire even if they don't reference the missing/removed field. Suggestions are: a validation on activation of a business rule to prevent activation if an action type component references a missing field, and a validation on removal of a field from a form that there is no dependency by a business rule for it to be present on the form.