This activity group fosters activity and collaboration on all aspects of the effects of uncertainty and error on mathematical descriptions of real phenomena. It seeks to promote the development of theory and methods to describe quantitatively the origin, propagation, and interplay of different sources of error and uncertainty in analysis and predictions of the behavior of complex systems, including biological, chemical, engineering, financial, geophysical, physical and social/political systems. This activity group serves to support interactions among mathematicians, statisticians, engineers, and scientists working in the interface of computation, analysis, statistics, and probability.

Join **Chair:** Andrew Stuart

**Vice Chair:** Serge Guillas

**Program Director:** Clayton Webster

**Secretary:** Youssef Marzouk

**Chair:** Max Gunzburger

**Vice Chair:** Mark Berliner

**Program Director:** Raul Tempone

**Secretary:** Youssef Marzouk

**Chair:** Donald Estep

**Vice Chair:** Max Gunzburger

**Program Director:** Roger Ghanem

**Secretary:** Habib Najm