A Critical Analysis of a Tourist Trip Design Problem with Time-Dependent Recommendation Factors and Waiting Times Porras, Cynthia Pérez Cañedo, Boris Pelta Mochcovsky, David Alejandro Verdegay Galdeano, José Luis Time-dependent recommendation factor Tourist trip design problem Waiting time Data Availability Statement: Publicly available datasets were analyzed in this study. This data can be found here: http://github.com/cporrasn/TTDP_TDRF_WT_NWT.git. Acknowledgments: C.P. has been supported by a scholarship from AUIP Association coordinated with the Universidad de Granada. B.P.-C. was supported by the Erasmus+ programme of the European Union. The authors are grateful to the editors and the anonymous reviewers for their constructive comments and suggestions. The tourist trip design problem (TTDP) is a well-known extension of the orienteering problem, where the objective is to obtain an itinerary of points of interest for a tourist that maximizes his/her level of interest. In several situations, the interest of a point depends on when the point is visited, and the tourist may delay the arrival to a point in order to get a higher interest. In this paper, we present and discuss two variants of the TTDP with time-dependent recommendation factors (TTDP-TDRF), which may or may not take into account waiting times in order to have a better recommendation value. Using a mixed-integer linear programming solver, we provide solutions to 27 real-world instances. Although reasonable at first sight, we observed that including waiting times is not justified: in both cases (allowing or not waiting times) the quality of the solutions is almost the same, and the use of waiting times led to a model with higher solving times. This fact highlights the need to properly evaluate the benefits of making the problem model more complex than is actually needed. 2022-02-10T08:57:54Z 2022-02-10T08:57:54Z 2022-01-25 info:eu-repo/semantics/article Porras, C.; Pérez-Cañedo, B.; Pelta, D.A.;Verdegay, J.L. A Critical Analysis of a Tourist Trip Design Problem with Time-Dependent Recommendation Factors andWaiting Times. Electronics 2022, 11, 357. [https://doi.org/10.3390/electronics11030357] http://hdl.handle.net/10481/72764 10.3390/electronics11030357 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España MDPI