This workshop offers an in-depth introduction to Source Apportionment (SA) and its real-time applications (RT-SA) using advanced aerosol instrumentation. Participants will explore key tools such as the Aerosol Chemical Speciation Monitor, Xact, and OC-EC/BC analyzers for real-time monitoring and analysis. Through expert presentations, live demonstrations, and hands-on exercises, attendees will gain practical insights into state-of-the-art techniques for identifying and quantifying aerosol sources. The session will conclude with an open Q&A and discussion with leading scientists and instrumentation specialists.