Purpose. This paper presents the innovative scientifically-based method on efficiency evaluation of the building production management for contracting companies. Otimisation models are substantially aimed at reducing the influence of negative factors and increasing the quality indexes of the organisational process of construction production. Methodology. Methodological approaches of the organisational processes optimisation of construction production are based on the establishment of a well-defined interconnection between the units of the functional structure, the definition of strategies hierarchy of the contracting company.The correlation of duration t and cost c in building production, its influence on the economic appropriateness for projects realisation in civil engineering are analyzed. Findings. Using mathematical analysing methods for cumulative distribution function S(t,c) of two-dimensional random value of construction duration and cost, the basic principles are shown that allow to qualitatively and quantitatively determine the level of influence of the construction market external factors on the implementation of organisational processes in the construction industry, in which a large number of forming elements are involved. The implementation of this methodology permits to assess the real state of organisational processes system in building production, its stability, the degree of determinate indicators structuring in a single functional system, to generate an economic justification in complex. On basis of simulation modeling, efficiency of organisational processes system in building production S(t,c) was determined and graphically illustrated. Originality. The results of the present study demonstrate that it amounted to 58.08 % within the established limits of acceptable risk (LAR) between 0.35 and 0.65. Practical value. It has been shown an implementation practicability of using this methodology by contracting companies at decision-making stage for construction projects initiation with determinate indicators of duration Td and cost Cd. The creation of theoretical and methodological foundations for the development of structural efficiency evaluation algorithms for the organisation of construction production will allow to achieve for contractor companies the highest level of competitiveness in the market of construction services.

Purpose. The study consists in development and implementation in the latest construction practice of scientific and methodological approaches to differentiation and planning of the construction organisational processes for contracting companies at the stage of initiating the project implementation with deterministic financing conditions. Identification of optimisation’s conceptual foundations takes into account the current situation in the domestic market of construction services, the economic conditions of contracting companies. Methodology. The choice of theoretical and methodological tools for optimising the contractor’s organisational processes is based on an analysis of the company's available material and technical resources, comparing them with the distribution value of construction works within the framework of the development and financing contractor’s strategy, increasing its competitiveness. The methodology for modeling the system of organisational processes is created on the platform of the construction works’ evolutionary strategy, that is, on the basis of optimal trajectories’ set for regulating processes, evolutionary strategies are created taking into account the standard operators of evolutionary computation. Results. Using of the operator of randomly determined exchange (crossing), corresponding to the inheritance’s natural process, shows the transfer of properties to new evolutionary strategies (descendants). After the crossing stage’s end, operators of random change in evolutionary strategies (mutations) are executed. The above operators are used repeatedly, which in turn leads to a gradual change in the original population. The generation process lasts until a deterministic level of convergence is reached, i.e. the resulting population reaches a given fitness-function (objective function of task optimisation). If the stopping criterion is the population’s quality, the speed of the method is estimated by the time it takes to reach this property. Originality. Genetic algorithms show significant implementation characteristics of solving problems of the organisational processes optimising for construction, in particular calendar and business planning. The methodological foundations of evolutionary computation, including the use of computers, greatly simplify operational tasks and contribute to obtaining the desired result. Practical value. Population structuring makes it possible to increase the efficiency of the search algorithm for optimal management of organisational processes. Evolutionary computation gains legitimacy in the interactive construction production regulating of contracting companies. Their use is justified especially in those cases when the exact optimum is not required in the management of construction processes – any value that is better than the directive or standard value can be considered a solution.