Although the United States Navy has had a mandatory Random Urinalysis Program in effect for many years, there has never been a formal, standardize methodology to implement the process. OPNAV INSTRUCTION 5350.4 (series) provides guidance on what must be accomplished, but not how to accomplish it. Automation and standardization of the program through software implementation can lend confidence to personnel who undergo urinalysis testing that the program is fairly and uniformly applied to each member of the command. Informal previous attempts at developing Random Urinalysis software utilizing unstructured methods has had less than successful results. To address this problem, this thesis describes the development of a complete software application designed to automate the Random Urinalysis Program. Using previous versions of urinalysis software as templates, a standardized, structured approach to application development is used to create a new system. The Definition, Requirements, Evaluation, Design and Implementation phases of software development life-cycle are fully utilized during project development. The result is an actual working tool for the fleet. DRUGDOG 3.0 is a comprehensive software application that will aid individual Urinalysis Coordinators in implementing the Navy's Random Urinalysis Program within their command.