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In carrying out construction projects, enterprises strive to obtain the highest degree of harmonization of the
work of the resources involved. It is manifested in ensuring continuous and regular production with a full usage of
their executive potential. The purpose of harmonization is to eliminate unjustified interruptions in the work of resources.
When planning the realization of non-repetitive construction projects, one should use methods of scheduling
that allow the analysis of the project model not only as a function of time. It is also important to take into account the
effectiveness of using your own resources and limitations in their availability. The article analyzes the problem of
harmonizing the work of crews of the general contractor, performing non-rhythmic, non-cyclical and inhomogeneous
processes under the assumption of deterministic operating conditions. An important issue from the point of view of
reducing the costs of crews’ employment is the continuity of their work. A mathematical model was developed concerning
the problem of minimization of downtime in the work of the general contractor crews with a directively fixed
time and limit of the project realization cost, taking into account the limitations in the availability of crews and the
possibility to outsource works to subcontractors. The possibility of subcontracting works does not allow for a clear indication
in the project model sequences of processes carried out by crews and the usage of previously developed
scheduling methods. The method of solving the model (in a linear form with continuous and binary variables) is presented
in the example. Additionally, the proposed method allows analyzing the impact of the amount of downtime at
work on the duration of the project and the impact of the work outsourced to subcontractors on the continuity of the
general contractor’s work.
