Is there any statistics or at least some industry consensus on what are commonly acceptable quality levels for various kinds of software?
I am certainly not talking about space shuttles or life supporting machines where the answer is more or less obvious. Rather, I am talking about such things as casual games, enterprise apps, e-commerce websites etc.
Again, it is pretty obvious that even with these types of apps, defects causing loss of money or similar severe consequences are unacceptable. But what about crashes, intermittent malfunction, and defects having an awkward, but still a workaround?
Please bear with me here, as I've seen a number of internal apps that are slow, buggy, ugly as hell, but are nevertheless successfully helping to run businesses and are actually used despite all their deficiencies.
Moreover, I've seen cases where customers were intentionally not willing to pay for good quality: absence of major/critical defects was all they needed.
Of course it always helps to ask for a specific customer's expectations, but having some reference points/examples would greatly facilitate such a conversation as well as help properly plan the amount of prevention and appraisal efforts.