Timing constraints in message sequence chart specifications, in

When dealing with timing constraints, the Z.120 standard of Message Se-quence Charts (MSCs) is still evolving along with several proposals. This pa-per rst reviews proposed extensions of MSCs to describe timing constraints. Secondly, the paper describes an analysis technique for timing consistency in iterating and branching MSC specications. The analysis extends ecient current techniques for timing analysis of MSCs with no loops nor branch-ings. Finally, the paper extends our syntactic analysis of process divergence to MSCs with timing constraints