定义：BART analysis is a tool used to identify problems and effectiveness of processes in Agile teams.
    BART是首字母缩写： boundary，authority，role，task.

    • Are the boundaries of the roles clearly specified and agreed within the team?
    • Is authority formally defined and adhered to by all?
    • Are there any informal roles in the team? If so, how does the team deal with them?
    • Are all team members clear on their tasks?
    • Are there any differences between the stated and actual ground rules in the team?