Clients who feel that they have suffered damages as a result of a professional's breach of his or her duty of care can bring a negligence case against the professional referred to as a case
a. malfeasance
b. malpractice
c. mistake
d. physician liability
e. physician guilty

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.