disciplined
adjective /ˈdɪsəplɪnd/
  /ˈdɪsəplɪnd/
- trained to obey rules and orders and behave in a way that shows control
- a disciplined army/team
 
 - able to control the way you behave and to make yourself do things that you believe you should do
- The company takes a disciplined approach to managing costs.
 - a highly disciplined approach to work