Thursday, August 24, 2006

Feedback cited as the core concept in Systems Dynamics

Cornell's SD site, in "Other Resources", at the bottom line, lists this:

The main concept behind system dynamics is feedback thinking. To explore the history of feedback thinking, see:

  • Richardson, George P. (1991, 1999) Feedback Thought in Social Science and Systems Theory. Now available from Pegasus Communications (Click on the System Dynamics link in the “Browse Products by Subject box on the left-hand side.)

Systems thinking and health care - reflection

Thursday, August 24, 2006

Systems thinking about assembly line health care

Why are the Big Three auto companies going broke, and if their high-tech Detroit area assembly-line operation is our model for health care, is that our destiny as well?

Consider this recent news.

New York Times
August 19, 2006
Ford Is Slashing Production 20% for 4th Quarter
By MICHELINE MAYNARD
DEARBORN, Mich., Aug. 18 — The Ford Motor Company, which is struggling to keep its grip on second place in the American car market, said Friday that it would cut by one-fifth the number of vehicles it plans to build in the final three months of the year.

The slowdown represented the deepest production cuts since the industry’s crisis of the 1980’s. It also underscored the difficulty that Detroit, whose business relies on sales of sport utility vehicles and pickup trucks, is having as gas prices remain around $3 a gallon. Detroit’s market share has dropped to its lowest level in history, while Asian brands, known for their fuel efficiency, are setting sales records...

On Friday, Ford officials contended that no one in the industry could have anticipated that gasoline prices would remain so high ... [emphasis added]

The mental-model of fine-tuning assembly-line clinical medicine may break down when seen through public health's wider lens, or in light of the impact on the humans whose bodies and lives provide the pixels on which this video is displayed, or be fine in both those contexts but have issues when seen in terms of globalization and the increasing ability of patients to fly to Singapore for surgical care at a total cost well less than similar care here.

The "systems thinking" approach suggests that we should spin through all those lenses on our microscope and consider whether each one makes sense, before we fixate, as Ford and GM seem to have, on activities that are perfectly sensible when removed from global context, but that look different when viewed in situ.

In clinical care systems we know that the parts do not exactly fit, and are not always well-coordinated. We take as an unexamined given that with just a little better training, a few more messages here and a new EHR message-store component there, surely this will come-together, click, and emerge as a dynamically stable and scalable system that cranks out top-notch patient care and dollars like a fine-tuned machine. Won't it?

In the 21st century, Peter Senge said, it is not enough that organizations persist well, they also must be able to change well. And Cybernetics 101 teaches us that in order to change well, a system needs to be able to see well. Perception is everything. We should confirm that those specs are reflected in the Electronic Health Record brave new world we're building nationally, before too much concrete is poured that will need to be ripped out and redone.

Like GM, we both face the twin questions of how humans fit into the assembly line model, over extended time periods, and, stepping back, whether the product those lines are producing is, viewed in global context, the product consumers will be buying next year.

We have to make sure not only that we're solving the problem right, but that we're solving the right problem. And, in the way of systems, we have to ask whether the way we're structuring humans and machines to solve the one problem doesn't create, as an "unintended side-effect", an emergent interference with our ability to see many small signs on the front lines that things are changing and the old model doesn't really fit the new reality.

Or are we somehow blinding ourselves to marketplace changes that seem obvious to the world not embedded in our own internal story? Ford executives asked who could have known that gas prices might rise? Hmm. Somehow they managed to assemble a workforce of half a million people with a resultant net organizational IQ of less than the average teenager. We need to ask where their collective common-sense-emerging process broke down, to be sure we're not following in their footsteps and mimicking their behaviors a little too closely.

Obviously, the problem is subtle. This is the way with most system problems.

There's lots of blame being spread around for "obvious" events and causes and decisions, including health care costs in another reflexive feedback loop, but we of systems thinking world know those are typically red-herrings and just symptoms of far more subtle problems in systems dynamics space. We are in desperate need of a "macroscope" that makes this almost invisible tissue stained and visible to the naked eye at last so we can see not just the microbes that we deal with daily, but the living dysfunctions that appear capable of infecting human organizations and causing Detroit blindness.

I'm not forecasting what tomorrows customer and problems will be, only that they will not be the same as yesterday's, in some really important ways. But I am saying that, based on the inexorable evidence and outcomes of the US automobile industry, there is something deeply but subtly wrong with the assembly-line model on a system dynamics basis - something that results in organizational blindness and incapacity to adapt.

It would seem the better part of valor to figure out exactly what that is, and make sure we don't inadvertently copy that into health care delivery systems as well.

Bottom line, literally: it would seem worth easily a billon dollars and a million votes to the Michigan economy to understand that answer in depth, and not just superficially. Whatever it is, there's a lot more where it came from.

Saturday, August 12, 2006

Packaged simulators for Health Care insight

The Systems Dynamics Society web-pages on "Other Resources" have a link to the K-12 education SD community, and to the newsletter "The Creative Learning Exchange".
Volume 15 number 2 (Spring, 2006) issue of that has an article by Gary B. Hirsch, Consultant and Creator of Learning Environments, Wayland MA, USA, titled "Packaged Simulators and Simulation-Based Learning Environments: An Alternative to Model-Building That Can Expand the Audience for System Dynamics.

Examples shown are a driving simulator on "curve safety", a house-temperature simulator, and a Retail Store simulator game, and a Public School Reform simulator (for adults). Multiple available exploratoriums are described at the end of the article, including a "health care simulator".

MPH Curriculum Systems Thinking Competencies

ASPH Education Committee

Master's Degree in Public Health
Core Competency Development Project
Version 2.1 (June 2006)

Systems Thinking List -pdf page #25 (shown below)
Systems Thinking membership: pdf page # 40
http://www.asph.org/UserFiles/FinalVersion2.1.pdf

Systems Thinking

The ability to recognize system level properties that result from dynamic interactions among human and social systems and how they affect the relationships among individuals, groups, organizations, communities, and environments.

Competencies: Upon graduation a student with an MPH should be able to ...

1) Indentify characteristics of a system.

2) Identify unintended consequences produced by changes made to a public heatlh system.

3) Provide examples of feedback loops and "stocks and flows" within a public health system.

4) Explain how systems (e.g., individuals, social networks,organizations, and communities) may be viewed as systems within systems in the analysis of public health problems.

5) Explain how systems models can be tested and validated.

6) Explain how the contexts of gender, race, poverty, history, migration, and culture are important in the design of interventions within public health systems.

7) Illustrate how changes in public health systems (including input, processes, and output) can be measured.

8) Analyze inter-relationships among systems that influence the quality of life of people in their communities.

9) Analyze the effects of political, social, and economic policies on public health systems at the local, state, national, and international levels.

10) Analyze the impact of global trends and interdependencies on public health related problems and systems.

Lewis Thomas on interventions in complex systems

Sterman quotes Lewis Thomas in Lives of a Cell, 1974 (p90):

When you are confronted by any complex social system, such as an urban center or a hamster, with things about it that you're dissatisfied with and anxious to fix, you cannot just step in and set about fixing with much hope of helping. This realization is one of the sore discouragements of our century. You cannot meddle with one part of a complex system from the outside without the almost certain risk of setting off disastrous events that you hadn't counted on in other, remote parts. If you want to fix something you are first obligated to understand... the whole system.. Intervening is a way of causing trouble.