Combinatorial Method of Computer-Assisted Multiversion Design of Construction Operations

A combinatorial approach to the automated design of construction processes on the variant basis is reviewed in this article. The essence of the approach is in the automated formation of a complete set of all feasible planning and technical solutions for construction works at each design stage based on the capabilities of the construction and installation contractor, working conditions, the characteristics of the construction facility, followed by selection of the best solution according to specified criteria. Choosing of the best option for the construction process implementation occurs after the completion of the full range of formation of technological and planning solutions for each of the alternatives allowing full use of system approach in designing of the construction operations. A combinatorial approach based on the analysis procedures (in fact, building a decision tree for certain stages of design) and synthesis (finding all possible combinations of complex construction production based on the selection of options for the construction of its individual subsystems and elements) is used as a methodological basis for generating alternatives. The choice of the best option of a complex of planning and technical solutions for the implementation of the construction process is carried out at the final stage, which allows to implement the system technical approach to the design of construction systems to the greatest extent [1], since each alternative solution of each stage of the design of the construction production is estimated in terms of its impact on all the fundamental parameters of the system – the duration of the construction process and indicators of uniformity of resource usage within the schedule, the cost of the construction of the object, the parameters of the site organization within the construction master plan, the intensity of the process, etc.