Elton Mayo and his researchers saw that shortening workdays. Modifying rest periods changing illuminations for the test group and varying incentive pay system did not explain changes in productivity. They found that improvement in productivity was due to such social factors as morale’ satisfactory interrelationships between members of a work group (A sense of belonging”) and effective management that understands human behavior and uses interpersonal skills as motivating, counseling, Leading and communicating. This phenomenon of “noticing” people is called the hawthorn Effect. Recent contributors to management thought.

1. Peter F.Drucker.

2. W.Edwards Deming.

3. Lanrence Peter.

4. William Ouchi.

5. T.Peter’s & R. Waterman.