Totally useful, in cockpit, cabin and cockpit/cabin relations -expecially since the strenghten cockpit door is a must!
Human will always make errors, but being prepared on the topic can create a much easier understanding between crews, without undervalue the Captain -who is still the decision maker- but cooperating and adapting with any kind of person you could face during your flights
Every person dealing with a teamwork job, such as medics, nurses, fightfighers and many more, should know something about it!
Last but not least....
it works also with your wife/husband!!!
Skunkie