主题：如果您在我的位置，您会怎么办？ -- 煮酒正熟

Once you had the ownership, then every things break down to pure communication techniques. Because what you want to correct is your responsibility.

Set the stage before you are going to point out any bug. Never assume he understand your good intention. So you have declare all the possible misunderstandings, like " no offence to you", or " just for the business, not personal matter", or " I don't care how your (our) campaign executed before, however, for the present one, I would like to change this (the bug, don't need to use noun like bug that had bed connotation) to that (the correct way you want to be) because ba ba ba (the “because” clause is very important that justify you claim)."

Sandwich every statement that may hurt him with two appraisal statements.

When in the meeting with boss together, give him some credit for his helps.

Every day say a good thing of him. Like “you look good”. “You have a nice shirt”. “Your hair looks terrific”.

Best wishes to you. Hope you became a prefessional project menager.