soundness
noun /ˈsaʊndnəs/
  /ˈsaʊndnəs/
[uncountable]- the quality of being sensible; the fact that something can be relied on and will probably give good results
- soundness of judgement
 - financial soundness
 
 - the quality of being good, detailed and complete
- He had confidence in the soundness of his understanding of physics.
 
 - the fact of being in good condition; the fact of not being damaged, hurt, etc.
- the soundness of the building’s foundations