Whate is basic difference between Line, Line & Staff and Functional Organization?

Line, Line & Staff and Functional Organization 

For Line organization Line managers are generalists. The line of authority is vertical as it follows the principle of scalar chain There is strict discipline It is not based upon planned specialization There is unity of command It is suitable for small scale operations It is quite economical

For Line and staff organization 1. There are experts known as staff to advise and assist the line officials 2. Line authority and staff people with advisory authority 3. Loose discipline 4. It is based upon planned specialization 5. Unity of command observed to a great extent 6. Suitable for medium scale operations 7.Little costlier

For Functional organization  Functional managers are specialists in their respective areas The line of authority is functional or diagonal. The functional manager has authority over the functions wherever it is performed. Loose discipline Based on high degree of specialization Unity of command is not followed as each sub-ordinate gets instructions from his line boss and the functional bosses. It is suitable for large scale operations where expert knowledge in certain fields is a must Very costly