Dear Ms. kala,
In short and sweet, rather confusing you, i want you to ask yourself "Is HR RESPONSIBLE FOR OPERATIONS TEAM PERFORMANCE"
1) HR TEAM will be blamed, if you failed to recruit and setup THE BEST OPERATIONS TEAM, which may be one of the reason for NON-PERFORMANCE. Not to mention, OPERATIONS HEAD should participate in RECRUITMENT PROCESS.
2) HR TEAM will not be blamed if OPERATIONS TEAMS failed to meet objectives or perform as per company expectations then, OPERATIONS HEAD to be blamed. OPERATIONS HEAD should train and motivate his employees that yields BEST RESULTS.
OPERATIONS HEAD should identify what is LACKING in his TEAM so that, his team members can be trained to fill that particular gap.
I had repeated this phrase in most of my post "TRY TO FIND OUT THE ROOT CAUSE FOR NON-PERFORMANCE, FAILURES, ETC" Once you identify the root cause, you will find solution as well. Many people are fond of reacting rather responding to the problem as I found this drawback as habitual.
We need to apply logic which will give you solution to every problem. Infact there are NO PROBLEMS only CHALLENGES and OBSTACLES. If you treat PROBLEMS as OPPORTUNITIES then you will find yourself ahead of others, because your approach is UNIQUE when compared to the rest.
With profound regards