realistic problem seems to have an easily identified core that fits a
recognised problem. You can start by taking the core first and working
outwards. We decided easily, at the outset, the the core Package Router
problem was a required behaviour control problem
usually sub problems surrounding the core (typically information
subproblems). Info subproblems usually easy to separate out from the core; it
treats its real world as autonomous
frames are composites and have standard decompositions. When we recognised
the information display problem we saw it would require a dynamic model and
also needed a static model.
problem for common or characteristic concerns and difficulties – often they
will reveal further sub problems.