Author(s)

Anthony S. White

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A description of the Systems Dynamics paradigm is given and the reduced Qualitative System Dynamics (QSD) form explained. A simple example is given to illustrate the diagram construction. The principles of states (levels), rates and feedback loops are outlined. The QSD method is used to address the problem of accessibility by using human control of automation as an example, and applying the QSD method to evaluate the effects of the researcher and user in the de- sign of an accessible artefact. This simple automation model illustrates what can be found out from such a picture, in this indicating how the feedback from users has an influence on the time to deliver such designs.

Qualitative System Dynamics, Computer Interaction, Accessibility, User Feedback, Software Design

A. White, "Qualitative System Dynamics as a Tool in Accessible Design," Journal of Software Engineering and Applications, Vol. 4 No. 1, 2011, pp. 69-80. doi: 10.4236/jsea.2011.41008.