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systems
thinking
cybernetics
thinking about systems primarily as
dynamic patterns of
interaction and feedback
(rather than as static abstractions)
your wife is
very
beautiful
Just calling it
"feedback" doesn't
mean that it has
actually fed back.
The amount of feedback
built into living organisms
differs by many orders of
magnitude from the
amount we build into
man-made systems.
John Gall
There is not one living
creature that lacks that
integrated, total unification
through feedback.
John Gall
Compared to a frog or a
salamander, our biggest
manmade systems seem
like simple wind-up toys.
John Gall
Ignoring feedback merely
means that the system will
eventually experience a
massive unpleasant surprise
rather than a small
unpleasant surprise.
John Gall
It may look like a
crisis, but it's only
the end of an
illusion.
tinitus
danger
change
Blood Sugar
is
is
Hyperglycemia
is
senses
pancreas
Hyperglycemia
is
senses
pancreas causes
insulin
Hyperglycemia
is
senses
pancreas causes
insulin
senses
liver &
muscles
Hyperglycemia
is
senses
pancreas causes
insulin
senses
liver &
muscles
causes
glycogen
Hyperglycemia
is
senses
pancreas causes
insulin
senses
liver &
muscles
causes
glycogen
Hyperglycemia
is
senses
pancreas causes
insulin
senses
liver &
muscles
causes
glycogen
Hypoglycemia
Hyperglycemia
is
senses
pancreas causes
insulin
senses
liver &
muscles
causes
glycogen
Hypoglycemia
Hyperglycemia
pancreas
senses
is
senses
pancreas causes
insulin
senses
liver &
muscles
causes
glycogen
Hypoglycemia
Hyperglycemia
pancreas
senses
glucagoncauses
is
senses
pancreas causes
insulin
senses
liver &
muscles
causes
glycogen
Hypoglycemia
Hyperglycemia
pancreas
senses
glucagoncauses
senses
is
senses
pancreas causes
insulin
senses
liver &
muscles
causes
glycogen
Hypoglycemia
Hyperglycemia
pancreas
senses
glucagoncauses
senses
causes
Systems tend to
oppose their own
proper function.
Henri Louis Le Chatelier
Le Chatelier's Principle
All change can be
understood as the
effort to maintain
some constancy...
All change can be
understood as the
effort to maintain
some constancy...
...and all constancy
as maintained
through change.
The battle over food and
territory between two species
is only one half of the story.
The battle over food and
territory between two species
is only one half of the story.
...the battle is a means or
process of generating,
maintaining, and stabilizing
an ecosystem.
Gregory Bateson
Steps to an Ecology of Mind (I think)
evolution
evolution
is always
evolution
is always
co-evolution
John Gall
What is involved is
not simply survival
of the fittest
What is involved is
not simply survival
of the fittest
but survival of the
fitting-in-est.
John Gall
break;
slack
Queues amplify
variability.
Moving from 75 to
95% utilization
increases variability
by 25 times.
local optimization
=~=
global pessimization
the whole is greater
than the sum of the
parts
Successful change can
only come in the
context of a clear
understanding of what
may never change,
what the organization
stands for. ...
If nothing is declared
unchangeable, then the
organization will resist
all change. When there
is no defining vision,
the only way the
organization can define
itself is its stasis.
Every effect has
a cause...
The Causation Fallacy
Every effect has
a cause... and we
can tell which is
which.
The Causation Fallacy
defects lateness
cause effect
====
defectslateness
cause effect
====
The Law of
Unintended Consequences
Failure demand
"Demand caused by a
failure to do something
or do something right for
the customer"
John Seddon
Failure demand in
software
?

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Systems Thinking