rigorous

rig·or·ous

ˈriɡ(ə)rəs/

adjective

extremely thorough, exhaustive, or accurate.

"the rigorous testing of consumer products"

synonyms:meticulous, conscientious, punctilious,careful, diligent, attentive, scrupulous,painstaking, exact, precise, accurate,thorough, particular, strict, demanding,exacting; 

informalpersnickety

"rigorous attention to detail"

(of a rule, system, etc.) strictly applied or adhered to.

"rigorous controls on mergers"

synonyms:strict, severe, stern, stringent, tough,harsh, rigid, relentless, unsparing,inflexible, draconian, intransigent,uncompromising, exacting

"the rigorous enforcement of rules"

(of a person) adhering strictly or inflexibly to a belief, opinion, or way of doing something.

"a rigorous teetotaler"

synonyms:strict, severe, stern, stringent, tough,harsh, rigid, relentless, unsparing,inflexible, draconian, intransigent,uncompromising, exacting

"the rigorous enforcement of rules"