I like this question, but it is hard to define one that is global to all projects.
Without putting much thought into it though, I'd say the hand washing of development is source control. Most projects know they need source control so do some parts of it, but don't use it to properly make reproducible software builds consistently. And sadly I have ran into a lot of people still not using source control, which blows my mind.
Without putting much thought into it though, I'd say the hand washing of development is source control. Most projects know they need source control so do some parts of it, but don't use it to properly make reproducible software builds consistently. And sadly I have ran into a lot of people still not using source control, which blows my mind.