Didactic strategy Illustrations as a contribution to the understanding of the topic value chains in the industrial engineering major of the UNAN-FAREM-Carazo. torreon [Internet]. 2025 Apr. 11 [cited 2025 Aug. 7];14(39):147-56. Available from: https://revistas.unan.edu.ni/index.php/Torreon/article/view/5016