Leonard, C.A
1988
Thesis, M.Eng. (Building), Centre for Building Studies, Concordia University, Supervisors: P. Fazio and O. Moselhi

Abstract:

"The Leonard Study. Prepared by Charles A. Leonard, this study quantifies the negative effect cumulative change orders have on the contractor's labor productivity on the unchanged work. Leonard found that where change order hours exceeded 10-15% of earned base contract labor hours, a contractor would incur labor productivity losses on the remaining work. Leonard also developed several graphs that can be utilized by contractors to predict the labor productivity impact to base contract work associated with the occurrence of project changes where those changes constitute more than 10-15% of the base contract labor hours." (Description by Thirteenth annual Northeast surety and fidelity claims conference september 12 - 13, 2002 a surety's guide for evaluating construction claims

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