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(CHAPTER 09)
***
Choice of management patterns is a result of pressure exercised by outside
demands.
***
Game of Control
* Intervention dynamic
=> Largely affected by human decisions on how to regulate a process, serves
as a means to control or mitigate the effects of Natural Dynamics.
=> Example: Brook's Law - "Adding manpower to a late project makes it later."
* Natural dynamic
=> Beyond direct human control. Human decisions in the form of Intervention
Dynamics are imposed by the circumstances.
Example: A management pattern is an Intervention Dynamic, however, the choice
of using a pattern is imposed by Natural Dynamics.
***
Natural Dynamic
* Example: Square Law of Computation
* How can any organization handle growth in complexity?
=> Simplifications made by applying general principles.
Chess: castle early, don't jeopardize your queen, ...
PM: keep team sizes small, break work down into modules, ...
***
Square Law of Computation
"""
Unless some simplification can be made, the amount of computation to solve a
set of equations increases at least as fast as the square of the number of
equations.
"""
***
Size/Complexity Dynamic
Square Law of Computation combined with the fact, that we cannot alter our
brain capacity quickly or indefinitely.
With SW development being a very complex and non-deterministic process, the
fact that it is done by humans, whose intellectual capacity is limited, makes
it even more difficult.
***
Variations:
* Fault Location Dynamic:
As the system grows, the number of errors *and* the number of places to *look*
for errors increase, which makes bug-squashing a non-linear effort.
* Human Interaction Dynamic:
As the number of people (staff) increases, also the interactions per person
increase and the number of total interactions (in a team) grow immensely.
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