Douglas Harper's Etymology Dictionary
survivability
1881, from survivable + -ity.
Wiktionary
survivability
n. 1 (context uncountable English) The condition of being survivable 2 (context countable English) A measure of the extent to which something is survivable
Wikipedia
Survivability
Survivability is the ability to remain alive or continue to exist. The term has more specific meaning in certain contexts.
Usage examples of "survivability".
Marketable job skills are of paramount importance to the self sufficiency and survivability of Alumni.
The Shiloh was tough, built for survivability, especially against EMP--but not that tough.