One of my former bosses had a nice sign on his desk: “It’s my fault!”. He often pointed to it silently when we came to him again finger-pointing on each other – complaining and quarreling.
Our project was very stressful. Everyone had a lot to do on a tight schedule. Of course, we had defined our responsibilities at the beginning of the project so that we could each concentrate on our areas. Given the complexity of the project, this was a must.