The paper proposes a special kind of function of beta probability density distribution of the random variable to estimate probability of execution of the construction program in full and within the given timeframe. This function allows us to consider the impact of the effectiveness of the control system on the probability of the program execution in time. To achieve a high level of reliability of the realization of the construction program (at least 0.9 ), the strategies for performance of preliminary requirements for management system, accounting reserves of time and building structural redundancy in the organization of construction were proposed. Examples of the corresponding estimates are given.