Arguing ad nauseum   episode 3
Channel: Ray Feodoroff
Date: 2021-08-17

The slide pack that prompted this response (see slide 5 for "means-ends" and with the random splatter of the word "frame" over multiple slides):

http://psas.scripts.mit.edu/home/wp-content/uploads/2016/01/24-BillYoung-W2016.pdf

Not to forget the 6 variable model as a Problem Frame:

https://www.uni-due.de/imperia/md/content/swe/papers/icsoft16a.pdf

So, the point of my research has been that there is a collision of approaches that really emphasises that there is Unification of Intention that acts as the basis for a core requirements engineering model that welds together:
- The 4 variable model (really a control-theoretic idea)[Parnes and Madey]
- Problem Frames (via an interpretation of the 6 variable extension of the 4 variable model) [Michael Jackson and Jon Hall et al.]
- STPA (really control-theoretic, Intent and ends-means) [Nancy Leveson et al.]
- Goal Orientation (Dialectic, ends-means, means-ends and Intention) (Eric Yu, John Mylopoulos, Daniel Amyot et al.)
- case based reasoning (really Monological means-ends with Dialectic reasoning behind) [Tim Kelly, John Rushby et al.]

Not to mention a splattering of Deontic logic.

So, so many blind positions on what is the elephant in the room.   Something that, when embracing the collective, denounces the view that there is anything special about safety as a system quality, outside the moral, ethical and legal responsibility ensure safety is embedded in the system design. 

We are seeing the Agent Orientedness, that comes from the Goal Oriented camp, creeping into system-of-system concepts.   Agent and Goal Orientedness certainly has long been embraced in AI and is still going strong.  

Thus, it looks like Goal Orientedness in requirements engineering is, via the clumsiness of case reasoning and vague references to it from the STPA camp, due for a renaissance - really just the overnight success that its due since it has been here for 20 years or more.

The evidence we are converging on a requirements engineering and not a safety oriented approach is again via the STPA community:

https://www.researchgate.net/publication/335681960_STPA-Assured_STPA-DepSEC_QUASAR

Intermission 1 - 06:04
Intermission 2 - 11:03
Intermission 2 - 12:51 (QED)