Microseconds after the big bang, the universe's temperature is so high that even hadrons can not be formed, and quarks and gluons are not confined. This exotic state of matter is theorized as the "quark-gluon plasma." Fast-forward to the current time, it is believed that droplets of quark-gluon plasma are created in ultrarelativistic heavy ion collisions, for example, at the LHC at CERN or at the RHIC at BNL. There are many fascinating phenomena discovered in heavy-ion collisions. With the proliferation of new experimental results, it becomes increasingly essential to extract properties simultaneously from as many measurements as possible. It presents challenges both computationally and in terms of physics. In recent years, several studies have tried to tackle this problem with promising results. I will discuss in this talk some recent results from such statistical approaches, the challenges we face, and what might come in the near future.