systematic, methodical

系統(けいとう)	A system or process that acts like a chain:a supply chain of an army; the chain of events that leads fuel from the fuel tank to the pistons, or a person’s lineage. TTT

体系てきに(たいけいてきに)	Doing something systematically – going point by point. For instance, learning medicine organ-by-organ, or getting revenge on your ex by going to all your mutual friends one by one and trashing your ex.

慎重考える(しんちょうにかんがえる)	Someone who is very slow and careful but thorough in their working style.

思料深い(しりょうぶかい)	Someone who is prudent, thoughtful, sensible, who exercises discretion.

数量化(すうりょうか)	To quantify. To turn everything into a number, so as to put it into your system. Like in RPGs where things like strength, intelligence, and life, etc. are turned into numbers.