Systems thinking

systems thinking@JonJaggerjon@jaggersoft.comjonjagger.blogspot.co.uk

Sunday, 2 March 14

thinking about systems asdynamic, evolving patterns of

interaction and feedback

Sunday, 2 March 14

it is an axiom that influence is both a cause and an effect. nothing is ever influenced in just one direction.

Peter's Axiom

Sunday, 2 March 14

to say that certain events are causally connected is only a

clumsy way of saying they are features of

the same event

Sunday, 2 March 14

every effect has a cause and we can tell which is which.

Jerry Weinberg

The Causation Fallacies

Sunday, 2 March 14

defects lateness

cause effect

?

Sunday, 2 March 14

defects lateness

cause effect

?

Sunday, 2 March 14

Sunday, 2 March 14

Scrum Buses

http://jonjagger.blogspot.co.uk/2013/01/scrum-buses.html

Sunday, 2 March 14

feedback

Sunday, 2 March 14

X.o.r.g..o.m.n.c.t.o..i.p.i.i.y.e.d.a.k

valuesP ?

Sunday, 2 March 14

XCourageCommunicationSimplicityFeedback

valuesP

Sunday, 2 March 14

Scrum GuideScrum Teams deliver products iteratively and

incrementally, maximizing opportunities for feedback.

Sprint Review: ... the presentation of the Increment is intended to elicit feedback and foster

collaboration.

"

"Sunday, 2 March 14

just calling it "feedback" doesn't mean that it has actually fed back

Sunday, 2 March 14

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

Sunday, 2 March 14

there is not one living creature that lacks that integrated, total unification through feedback. John Gall

Sunday, 2 March 14

compared to a frog or a salamander, our

biggest manmade systems seem like

simple wind-up toys.John Gall

Sunday, 2 March 14

ignoring feedback merely means that the system will eventually experience a massive unpleasant surprise (rather than a small unpleasant surprise)John Gall

Sunday, 2 March 14

it may look like a crisis, but it's

only the end of an illusion

Sunday, 2 March 14

change

Sunday, 2 March 14

blood sugar

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Sunday, 2 March 14

Sunday, 2 March 14

is

Sunday, 2 March 14

is

Sunday, 2 March 14

is

causes

Hyperglycemia

Sunday, 2 March 14

is

sensespancreas

causes

Hyperglycemia

Sunday, 2 March 14

is

sensespancreas

causes

Hyperglycemia

insulin

causes

Sunday, 2 March 14

is

sensespancreas

senses

liver &muscles

causes

Hyperglycemia

insulin

causes

Sunday, 2 March 14

is

sensespancreas

senses

liver &muscles

causes glycogen

causes

Hyperglycemia

insulin

causes

Sunday, 2 March 14

is

sensespancreas

senses

liver &muscles

causes glycogen

causes

Hyperglycemia

insulin

causes

Sunday, 2 March 14

is

sensespancreas

senses

liver &muscles

causes glycogen

causes

Hyperglycemia

insulin

causes

Hypoglycemia

causes

Sunday, 2 March 14

is

sensespancreas

senses

liver &muscles

causes glycogen

causes

Hyperglycemia

pancreas

senses

insulin

causes

Hypoglycemia

causes

Sunday, 2 March 14

is

sensespancreas

senses

liver &muscles

causes glycogen

causes

Hyperglycemia

pancreas

senses

glucagoncauses

insulin

causes

Hypoglycemia

causes

Sunday, 2 March 14

is

sensespancreas

senses

liver &muscles

causes glycogen

causes

Hyperglycemia

pancreas

senses

glucagoncauses

senses

insulin

causes

Hypoglycemia

causes

Sunday, 2 March 14

is

sensespancreas

senses

liver &muscles

causes glycogen

causes

Hyperglycemia

pancreas

senses

glucagoncauses

sensescauses

insulin

causes

Hypoglycemia

causes

Sunday, 2 March 14

systems tend to opposetheir own proper function.

Henri Louis Le Chatelier

Le Chatelier's Principle

Sunday, 2 March 14

all change can be understood as the effort to maintain some constancy...

...and all constancy as maintained

through change.

Sunday, 2 March 14

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 ecosystemGregory BatesonSteps to an Ecology of Mind (I think)

Sunday, 2 March 14

evolution is always

co-evolution

Sunday, 2 March 14

what is involved is not simply survival

of the fittestbut survival of the

fitting-in-est

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slack

Sunday, 2 March 14

moving from 75% to 95% utilization increases variability by 25 times

Sunday, 2 March 14

flow

utilization 95%75%

Sunday, 2 March 14

that which optimizes one part

of the system necessarily

undermines the system as a whole.

Sunday, 2 March 14

whole parts>

Sunday, 2 March 14

Pu239

Sunday, 2 March 14

2kg + 3kg == 5kg

Sunday, 2 March 14

5kg + 5kg ==?

Sunday, 2 March 14

Sunday, 2 March 14

in medio stats virtus

Sunday, 2 March 14

The Law of Unintended Consequences

http://en.wikipedia.org/wiki/Cobra_effect

Sunday, 2 March 14

systems thinking@JonJaggerjon@jaggersoft.comjonjagger.blogspot.co.uk

Sunday, 2 March 14