Earlier quoted context omitted.
There is no stack ranking involved (as far as I know, at least in SW). That's why when an engineer is evaluated as under-performing this is really about their own (manager-perceived) performance vs the expectation, and there is no question about whether they'd be in an exceptional team. Now instead of a formal PIP that we know won't get anywhere, HR isn't shy about letting go dead-weight. My impression is that the de…
Occasional underperformance is normal variance as is overperformance. If you can't handle these cases you don't belong in management, and if you fire everyone for underperforming once (your suggestion) you will soon have no workers, and you will cause everyone remaining to underperform.
I'm not sure what you mean by `occasional underperformance`? I'm talking about a yearly performance evaluation, in my opinion an overall underperforming for a year is not "occasional", it shows something systemic. The truth is that sometimes we make bad hiring decision (in my group it has been 2-3%). We try to work with them for a few months, set goals, but ultimately you can't always recover everyone.