A couple of years ago I blogged on this topic but I see that it still is running rampant across the internet. So, I thinks to myself, thinks I, one more time into the fray.
- When Needed: This rule is not evaluated until there is a need for the status of this object that is being evaluated in another rule.
- When Changed: This rule would fire ONLY when the value of the data element changed.
- Not Known (NK) – the fact is not known and there has not been an attempt to evaluate
- Unknown (UK) – the fact is not known. There has been at least one attempt to evaluate the True or False condition but it has failed.