How to represent continuous activities in scenario diagram

[sbeaz]

I am modelling an object detection system for a vehicle, and would like to know how to represent continuous/perpetual activities on a scenario diagram.

For example, I have an actor - the environment - with functions provide environment state (for things like weather which will impact visibility for vehicle operator and camera sensor) and provide object kinematics which the system also needs to detect. The environment will continuously provide environment state throughout the scenarios, what is best way to show this on scenario diagrams?

Thanks in advance for your help

SBeaz

[JoshWedgwood]

This has been discussed before. Please see this forum post:

Representation of Perpetual Activity in Scenario Diagram

I am modeling a robot that picks up and delivers items in a warehouse(on the moon). One of the entities is the box the item is stored in, this entinty has an activity “store and protect item”. This activity starts before the scenario and continues even after certain interactions ( the box is picked and moved with the item still in it). I understand that the vertical yellow bar shows the time of the activity, although I cannot drag it above it’s first interaction. I am not sure how to show that …

My personal recommendation is to model it using system states on the scenario diagram.

Josh

[sbeaz]

Interesting, thanks for the reply. I will experiment with states like “object present in view”, with sub-states “object present in path”, “path clear”. Will also try experimenting with visibility states to weather conditions. How would you capture triggers for these transitions. Would these be Events or or from Functional Exchanges?