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Software Development Cycle
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.. admonition:: reading

   Cyganek section 2.3

A typical software development cycle looks like this:

.. figure:: 764px-SDLC_-_Software_Development_Life_Cycle.jpg
   :align: center
   :width: 70%

   `(Cliffydcw/Wikipedia) <https://en.wikipedia.org/wiki/File:SDLC_-_Software_Development_Life_Cycle.jpg>`_

Notice that it is a closed cycle---often by the time we've finish the
initial task, we've identified new features that we wish to
incorporate.