Definition.  Quite literally building on the foundation of the design process, development translates plans into actions and reality.  Seels and Richey (1994) write that development is defined by transformation of "design specifications" into the "physical form" (p. 35).  Development contains four subdomains:  print technologies, audiovisual technologies, computer-based technologies, and integrated technologies.  

Reflection.  The development phase of the instruction design process may be one of the most challenging.  While the design phase is full of possibilities, the development phase often sees reality and limitations challenge the possibilities explored in the design phase.  One of the most enlightening moments that I experienced during the IDT program occurred during a discussion of the development phase; the image of a triangle with "time," "money," and "scope" at each of the three points really emphasized the challenge and importance of having meaningful discussions with both the production team and the client--even if both of those groups are actually you! The development phase offers many opportunities to learn a new skill or experiment with new technologies, but I've learned to keep my enthusiasm over these new tools in check as I consider the limitations and learner needs evident in any given instructional context.