Disclosed are a method, a system and a computer program for managing services of human resources. The method comprises the steps of modeling human resources delivery services from a services provider to a client company to determine outputs from inputs and constraints; and constructing an objective function representative of services resources at said services provider. The method also comprises the steps of determining optimum levels of human resources based on said modeling, said constraints, and said objective function; and allocating said human resources based upon said optimum levels. Preferably, said optimum levels of resources are determined over tiers, sites and time periods. The preferred embodiment of the invention is a system and a method for resource allocation on BTO projects. This preferred system includes an optimization model, along with its inputs and outputs. This system may be used to address dynamic client needs before and during BTO projects.