This document outlines an innovative process used by a museum to engage visitors called Process, Data, and Participation (#PDP). It involves creating interdisciplinary teams to develop new exhibitions, collecting visitor feedback, and facilitating participatory in-gallery experiences and programming. The approach aims to make the museum more visitor-centered by incorporating visitor interests, testing new ideas, and evaluating exhibitions. Examples provided include a drawing activity inspired by an artwork that received over 3,000 submissions and an autoportrait app that over 3,700 visitors used.