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Systems Thinking and the design process.ppt

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Systems Thinking and the design process.ppt Powered By Docstoc
					1.   Explain that systems thinking applies logic and creativity with
     appropriate compromises in complex real-life problems.
2.   Describe that requirements are the parameters placed on the
     development of a product or system.
3.   Describe that a trade-off is a decision-making process recognizing
     the need for careful compromises among competing factors.
4.   Explain that optimization is the process used to make a design or
     system as effective as possible within the given criteria (desired
     specifications) and constraints (limits on the design process).
5.   Explain that “quality control” is a planned process designed to
     ensure that a product, service, or system meets established criteria
     and is sometimes based on international standards.
6.   Explain that complex systems have many layers of controls and
     feedback loops to provide information about a system.
7.   Describe how simulation and mathematical modeling are useful in
     enhancing or optimizing designs.
• Systems-thinking principles provide a
  conceptual base for addressing the
  complex issues that confront us by
  providing ways of viewing the world
  as a whole and using that view to find
  the leverage points for fundamental
  change.
                              Why do we have road
                              signs? What system
                              are they apart of?
                              How do these simple
                              things fit in to the BIG
                              PICTURE?



•Think about what factors must be considered before
building a sign support.
•Where have you seen signs and supports like these?
•Imagine that you are the president of a large
construction company that designs and fabricates
support structures for highway signs.
•The total process of installing a highway sign
involves the design of the supports, the making of
the supports, and the installation of the supports.
(not to mention the sign)

                              •What are some general
                              requirements (criteria and
                              constraints) that will influence
                              the design of structures?
                              •What are some general
                              requirements that will
                              influence the design of a
                              cantilever sign?
You are going to develop a concept map that
identifies factors related to each phase of the task.




                    FABRICATION


                       SIGN
                     SUPPORTS

      DESIGN                          INSTALLATION
Traditionally product development, was a “linear”
approach that employed each phase (design,
fabrication, and installation) independently and one
step at a time.




    Design           Fabrication         Installation



      What do you think might be the advantages
      and disadvantages of this approach?
The “Linear Overlapping” approach allows for
some collaboration


    Design         Fabrication     Installation




              Areas of Collaboration



    What do you think might be the advantages
    and disadvantages of this approach?
An improved approach allows for even more collaboration.



    Fully Collaborated
      Project Space
                             Fabrication




    What do you think might be the advantages
    and disadvantages of this approach?
•Ideally, the project path in this approach would take
place completely inside the area of collaboration and
can be thought of as the “project space.”
This graphic illustrates “Systems-Thinking” as it is
applied in the design and development process.
 I want you to recall some other factors that influence
 design (i.e. economics, society, and the environment).

Economics,
society, and the
environment must be
considered
throughout
the design process
to ensure that the
project will be
effective and
accepted.
                        Economics
          Fabrication
Society




          Environment
•Some of the societal factors may involve fair labor
issues, public health issues, and community issues.
•Economic concerns may relate to profitability, consumer
relations, and competition.
•Environmental concerns may involve ecosystem health.
•Develop a product using a Systems Thinking
development process.
•Integrate the design, fabrication, and installation
planning—taking into account from the start of the project,
economic, societal, and environmental factors.

                          Design, build, and test
                    a model of a freestanding structure
                         used to support overhead
                      road signs when the wind blows
                           on the sign or when a
                         heavy load is placed on it.
Wind Load Test: Set up the sign-support
structure, holding it in place
by anchoring the column by taping it to a desk
and blow air at the sign with a fan

Record your Answers…
1. Does the structure blow over or remain standing?
2. How strong a wind force can it withstand?
Weighted Load Test: Set up the sign-support structure
again.
Select a location farthest from the structure’s vertical
support and attach a small paper cup by a string, so
that the cup hangs straight down but does not touch
the “ground.”
 Record your results….
 1. Load the cup with weights
    (marbles or coins), one by
    one.
 2. How much weight can the
    structure hold before
    collapsing?
On a sheet of paper, answer the following with
complete sentences.

 •Explain that applying systems thinking to the design
 and development requires managers to address
 societal, environmental, and economic impacts
 throughout the process.
 •Explain that when systems’ thinking is applied to the
 design and development process, the potential for
 costly conflicts and incompatibilities and can be
 avoided.
 •Describe the benefits of applying systems-thinking
 principles in the design process.

				
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