What is meant by formal organisation?

What is meant by formal organisation? State any five advantages of this form of organisation.

or
State any four advantages of formal organisation.

Formal organisation is a system of well-defined jobs, each bearing a definite measure of authority, responsibility and accountability.
Advantages of formal organisation are:
(i) It makes fixation of responsibility clear and easier.
(ii) There is no confusion regarding work to be done by each individual.
(iii) Unity of command is maintained, which avoids confusion and conflicts.
(iv) It helps in achievement of goals by emphasising systematic working.
(v) It provides stability to the organisation.