How do I represent the age/staleness of composite data?
A system has a quantity that is the product of two others: C = A * B
Imagine A is an amount in Euro, B is the exchange rate to USD/EUR and C is the equivalent amount in USD.
Now, the values of A and B also have a timestamp, when were they refreshed last.
A might have been updated 3 days ago, and B a month ago.
- How do I define the "staleness" of
C? - Is it better to show a timestamp or some sort of fuzzy indicator?