Rigorous

[Raeanne Dimick]

Manifesting, exercising, or favoring rigor; allowing no
abatement or mitigation; scrupulously accurate; exact; strict; severe;
relentless; as, a rigorous officer of justice; a rigorous execution of
law; a rigorous definition or demonstration.

[Monty]

careful to look at or consider every part of something to make certain it is correct or safe:

[Sonia]

Extremely thorough, exhaustive, or accurate.