"To tune the models" means adjusting or optimizing the parameters of the models to improve their performance and accuracy in solving a specific problem or predicting outcomes. Full definition
How you fine tune the models above can depend on your future needs for capital and what kind of investor you are. (us.etrade.com)
Over time, we have fine - tuned our model for success and the dial has stopped somewhere between commercial success and creative freedom. (creativeboom.com)
The hypotheses were tested using species distribution modelling, and exploratory statistical analyses were performed to tune model settings. (news-oceanacidification-icc.org)