Extending Timed Process Algebra with Discrete Stochastic Time J. Markovski and E.P. de Vink When extending timed process algebra with discrete stochastic time, typical standard notions like time additivity are hard to preserve in the presence of the race condition. We propose context-sensitive interpolation as a restricted form of time additivity to accommodate the extension with stochastic time. We also present a stochastic process algebra featuring an explicit account of two types of race conditions in terms of conditional random variables. The approach enables compositional modeling, a non-trivial expansion law, and explicit manipulation of maximal progress.