I’m saying that they aren’t mutually exclusive, and that they are both parts of a total quality system and result from high variation and low manufacturing prec

I’m saying that they aren’t mutually exclusive, and that they are both parts of a total quality system and result from high variation and low manufacturing precision. Put another way, fridges that are well made don’t have wobbly doors. If you don’t care about wobbly doors, it’s still not a good idea to buy a fridge with wobbly doors - Fridges with wobbly doors tend to be more likely to have other issues than just a wobbly door. If you buy a new fridge from a company that is known to have wobbly doors because of low manufacturing precision, don’t be as surprised when your fridges glass shelves spontaneously shatter - you bought something that had high variation and was manufactured with low accuracy and a poor quality system.