When Do You Consider a Franchise Dormant?

[Vodacixi]

To me, 15 years or more without a new game/remake released. Some examples:

Punch-Out!! (15 years)
Jak and Daxter (15 years)
Wario Land (16 years)
Final Fantasy Tactics (17 years)
Earthbound/Mother (18 years)
TimeSplitters (19 years)