The Prostate Specific Anitgen (PSA) Immunoassay is a diagnostic test developed by Beckman-Coulter Inc. which is used to assess prostate cancer risk. The Beckman-Coulter Mathematics Clinic team has been tasked with developing a mathematical model of such a system in order to improve the sensitivity and runtime of the test. The Clinic team developed a compartment-based model to assess the effects of vari-ous system parameters.