Hi experts, re: Activity Diagrams: How to model actions sharing intermediate results This is a cross post from another group. Apologies. Excuse: I need an an answer fast. Thought: The heaven;y gates of excuses are always very busy ... Here goes... Scenario: In a UML/SysML activity diagram, I have two concurrent threads. In one thread there is Action X and in the second thread there is Action Y. Action X shares its intermediate result data with Action Y, because Action Y needs the data for its own processing. Similarly, Action Y shares its intermediate result data with Action X, because Action X needs the data for its own processing. How would I show on an activity diagram these two flows (exchange of data)? The problem I am having is that in order for an action to output something, then the action must complete its processing. That is the way I understand SysML actions: there is no such thing as an action 'somehow magically outputting something' while still only half-way complete. Seems to me that to model such a thing I am forced to add some detail inside the two actions X and Y. Example diagram supplied, of what I want to do. But I don't think that this activity diagram does it. Thanks, Avraham

Does SysML/UML provide good diagrams for the description of Concept of Operations (CONOPS)? Should CONOPS focus on sunny day scenarios only or contain also some rainy day scenarios? We have Use Case Diagrams and Sequence Diagrams that can be used to capture some behaviors of the system, but they may be either not descriptive enough (Use Cases), or too technical and requiring some understanding of the pieces of the system (Sequence Diagrams). I believe CONOPS are more about telling stories about how users of the system will get the services they are expecting. Thanks please to share your experience.

Hi there! I am wondering, has anyone a good indication about how much time should roughly be spent on each of the activities (prototype definion, object analysis, architectural design, mechanistic design, detailed design, model review, validation, review) during one cycle?