Determining the probabilistic estimates for time reserves as one of the planning and control problems

Probabilistic characteristics of time parameters for business processes planning and implementation stages are considered. It is shown that the sum of planned time reserves has the close to normal probability distribution, even at fairly short chain of works. It is also shown that unspent time reserves have a probability distribution that is close to truncated normal distribution. A method of evaluating time reserves distribution at a final stage of work is suggested. It is noted that results verification is conducted through comparison of obtained theoretical results of time reserves distribution with the real process of letters passage to the regions.