**5. Conclusions**

Tendering is an obligatory and basic process (though not the only one) on the construction market in the Polish public sector. In 2017, the majority of construction orders resulted from bids, (according to the Public Procurement Bulletin [42], 86% of orders). This way of acquiring contractors is also used by clients representing the private sector, who themselves decide on the form of awarding contracts. A tender has many advantages, as it is the most competitive process, while its procedure is not complicated. Polish contractors identified 15 factors influencing their bidding decisions. These factors were grouped into main criteria, with each group consisting of sets with sub-criteria. On this basis, a model was proposed, the aim of which was to facilitate the choice of a tender appropriate for the company. To construct the model, the Fuzzy AHP method was used. To prove that the model works, an example was presented in which a bid/no bid decision about four possible tenders was to be taken. As a result of the application of the method, the P3 project was shown to be the one with the highest priority weight (0.4707). It is noteworthy that, according to experts, the modelling performance proved that the most significant element of evaluation was the criterion concerning the financial conditions of the project under tender, while the least vital one was the specifications of the tender itself, namely, the time of bid preparation and the criteria of bid selection. The model proposed here is assumed to be universal, and may be applied to facilitate contractor bidding decisions not only on the Polish market. However, the type and influence of the factors on bidding decisions should be related to the environment in which the contractor works. In further studies, the authors plan to focus on further objectivization of the selected criteria for assessing the problem under investigation, as well as their validity. Attempts will also be made to analyze the flexibility of the final decision, by using sensitivity analyses, and measuring the consistency of assessments made by the decision-maker.

**Author Contributions:** The individual contribution and responsibilities of the authors were as follows: A.L. and E.P. made a review of the literature concerning models supporting bidding decisions and distinguished in the study factors influencing bid/no bid decisions. A.L designed the research main idea and collected the data. D.K. and K.Z. together analyzed the data and the obtained results. S.B. provided extensive advice throughout the study results and methodology. All the authors have read and approved the final manuscript.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
