You are willing to tell this person about the good, the bad and the ugly也比較trust他的judgement。
Mentor is overrated. Mentor不重要。更重要的sponsor。這個人是可以幫你說話推薦你去好的assignment,好的opportunity,提挈你的。是扶你上戰馬的人。推薦這本書。https://www.amazon.com/Forget-Mentor-Find-Sponsor-Fast-Track/dp/1422187160
Supply Chain到Finance,the easiest/obvious is cost savings. Beyond that you can also bring value by ensuring supplier quality, minimizing supplier risk, managing demand/inventory level, etc.