@Inquiry @Harishjosev

Yes, another version of #CSPeirce’s triad is #WRAshby’s distinction between #Machine (object, observed phenomenon), #System (a finite set of variables and their relationships selected by the #Observer), and the #Model created by the observer to describe or/and #Control the machine.

However, I was speaking about the different phenomena (machines) and their controllability.
Mere #Physical (static or dynamic) #Structures driven by known (discoverable, invariant) #NaturalLaws as opposed to emergent #DynamicalSystems that are under the influence of arbitrary, local #Rules as explained by #HHPattee.

According to #WRAshby, #Regulation is blocking the flow of #Variety from the (environmental) #Disturbance to the (internal, #System protected) #EssentialVariable. There are two primary forms of blocking the effect of the disturbance on the system:
1️⃣ Passive (by sheltering from), and
2️⃣ Active (on par with)
From:
W. Ross Ashby (1956) - An Introduction to Cybernetics, (Chapman & Hall, London) - available electronically from:
http://pespmc1.vub.ac.be/ASHBBOOK.html

Systems thinkers use a number of different terms for the three basic concepts in the “system’s triad” so that we have a “real system” as opposed to the “conceptual system” which is sometimes also called the “mental model” which is again different from the (real) descriptive or simulation model. In #Kihbernetics we make the distinction between #Machine, #System and #Model unambiguous following the rules specified in the works of #WRAshby and #HRMaturana

Ashby warns us against our first impulse to point at the pendulum and say ‘the system is that thing there’ because this has a fundamental disadvantage in that “every material object contains no less than an infinity of variables” from which “different observers (with different aims) may reasonably make an infinity of different selections.”

Therefore, there must first be given an #observer, and a #system is then defined as “any set of variables selected by that observer from those available on the real ‘machine‘”.

#HRMaturana defines a #system, as “a #configuration of #relations that an #observer abstracts in the flow of #interactions and #transformations of a #collection of #elements distinguished in the observers daily living” that is “spontaneously or artificially #conserved” in its #dynamic within some “#domain of concern” of the observer.

So, in Kihbernetics, the triad looks like this: