Joe implemented feature A. Sandra implemented feature B. Raj implemented C. All launched in July. Since then metric X is up 20%. Who gets credit, and what does that credit really mean?
Now say all 3 did that in 3 different products. One produced a 200% improvement in an internal product, one a 40% improvement in a product with thousands of users, one a 1% improvement in a product with a billion users? Compare *that*.
200% improvement may just be the result of feature A and 40% may just be the max performance gain from feature B. Comparing developers over the effectiveness of features they implement is mostly rating the PMs or the leadership they work with. Its a dice roll and its a measure of one's luck to be at the right place & right time to work on the right task.
People complain about using metrics. People complain about rating performance based on what your manager or coworkers say about you. Performance reviews are an unsolved hard problem.
Not the OP, but my proposal is to acknowledge that unsolved hard problems are... unsolved. Instead of inventing bullshit and pretending it's constructive. Some people make a career out of that bullshitting, others complain about it because it actually has a negative impact on them.
"What's your proposal", in my experience, is often used as a defense against someone calling bullshit. My proposal when I'm calling bullshit is that the bullshitter start being professional, but it's not exactly something I can say.
Joe implemented feature A. Sandra implemented feature B. Raj implemented C. All launched in July. Since then metric X is up 20%. Who gets credit, and what does that credit really mean?
Now say all 3 did that in 3 different products. One produced a 200% improvement in an internal product, one a 40% improvement in a product with thousands of users, one a 1% improvement in a product with a billion users? Compare *that*.