The article presents assumptions of a mathematical model of a planned number of man-hours verification on a construction site and the way it operates. The model is developed based on the theory of fuzzy sets, and the fuzzy modeling method used is fuzzy reasoning in the Mamdani-Zadeh architecture. The pre-accepted functions of assigning model inputs and outputs as well as the method of creating a rule base are presented. In the next stage of work, the assumptions made and the model’s operation should be confirmed