1) Abraham Maslow's work on the "Hierarchy of Needs" in the early 1950s. I need an explanation of how understanding the Hierarchy of needs helps a supervisor motivate the workforce.

2) The work of Douglas McGregor in the 1950s.

a) Description of McGregor's proposals for theory Y as compared with Theory X

b) Based on the observations in the construction environment, explain how someone would agree or disagree with these concepts