Every time you start work at a new company, you have to learn their SOPs--standard operating procedures. In a two-crew environment. Most of that is not so much what you do but what you say while you are doing it. There is a very specific vocabulary and grammar and specific phraseology for each situation you might encounter. This is intended to be absolutely standardized across the company, but is not standardized between companies. That would be impossible to completely standardize because of differences in aircraft and operations, but it could be largely so, saving work not only for pilots, but for the management who have to write the manuals tells us exactly what to say.
Let's say an engine fails. The first pilot to notice it, probably the flying pilot says something like ...
"Confirm number one failed."
"Engine failure, left engine."
"Left engine failed. Confirm."
The other pilot confirms the failure with language that probably echoes the wording of the first call, then they launch into the memory items of the engine failure checklist. Typically, in a propeller-driven aircraft, the steps are to feather the correct propeller, shut off the fuel for the failed engine in a couple of places and finish securing it from the written checklist. But because shutting down the wrong engine in an emergency is a highly reliable way of killing yourself, there's usually a whole litany of confirming before anything gets turned off.
The litany above might continue ...
FP: secure left engine
NFP: left throttle, confirm
FP: Confirmed. Close.
NFP: Left propeller, confirm.
FP: Confirmed. Feather.
NFP: Left fuel shutoff, confirm.
FP: Confirm. Close.
And so on. Somewhere in here is a tipping point where the procedure becomes so unwieldy that either it distracts the pilots from flying a seriously underpowered and lopsided airplane in an emergency situation OR the captain gets fed up with it and just shuts the damned engine down as she would have single pilot, thereby bypassing all the safety the procedure was designed to provide. Both are real risks. On the groundschool course that I recently had the privilege to attend free of charge with no obligation, I had the opportunity to witness the conception of a monster as one of the instructors noticed that an SOP involving selecting bleed air off in response to a duct overheat light did not have the identify/confirm step in it. I think I managed to avoid screaming "no! no!" (or maybe that's why they didn't invite me to continue with the programme) but I thought it. It's just bleed air. If the wrong one is selected off, an SOP such as "oops, other left" or "why don't you turn them both off until you get a chance to see which shoe the 'L' is written on?" isn't going to kill you. The management pilot concerned might argue that having a full on confirmation protocol won't kill me either, but it's sad when your SOPs aren't sleek and elegant.
You end up with something like this.