The closer relational proximity you have to someone, the more important it is to define a clear process in disputes.
Ambiguous processes in the midst of relational disputes only make matters worse, as either party will have their own ideas about how things should happen, and those different ideas about process will quickly be added to the list of ways that the other party has wronged them. E.g. “… and you handled it badly!”
If there’s not heaps in the relational baggage, then the process doesn’t need to be so defined. Parties don’t have much emotional energy invested in the issue, and so the process doesn’t get put under the spotlight as much.
It might see counter intuitive; you might like to think that people who are close can work things out well, but the opposite is normally true. Emotions are like hallucinogenic drugs to reason.