This volume contains papers presented at the first joint conference of the Software Pr- ess Workshop and the International Workshop on Software Process Simulation and Modeling (SPW/ProSim 2006) held in Shanghai, P.R. China, on May 20-21, 2006. The theme of SPW/ProSim 2006 was Software Process Change Meeting the Challenge. Software developers are under ever-increasing pressure to deliver their products more quickly and with higher levels of quality. These demands are set in a dynamic context of frequently changing technologies, limited resources and globally distributed development teams. At...