Current conditions of most project-oriented businesses based activities are related to the implementation of projects requires the management of these companies develop and apply appropriate procedures, methods and management techniques. The complexity of using classical approaches arises from the fact that the activities of design organizations is in many ways a unique non-recurring process. The practice of these companies shows that much attention from their owners paid not only to the global strategic objectives, but the current results of operations. In real situations, work portfolio management takes place in a high degree of uncertainty: the time of admission of projects, time and costs of their implementation, as well as other factors are random variables with specified or unknown distribution laws. On the basis of the standard portfolio management Project Management Institute USA (PMI) analyzed the portfolio management process using Markov chains for discrete states of the system. Identified processes (state) in which the portfolio manager is busy most of the time. Markov model state changes to determine the loading of a portfolio manager at various stages of portfolio management, which makes it possible to use these data in determining the KPI project managers when evaluating their work.