what principles and values do rules and strict adherence to them serve in representative deliberative body such as the united states congress?

Annie and bart are coworkers. in fact, they share a cubicle wall. recently, they were involved in a fender-bender in the company parking lot. each blames the other for the accident, and the two have stopped speaking. would you advise them to try to settle their dispute through arbitration, mediation, or with a traditional lawsuit? why?