Master, Expert and Machine

To build something new, you need a master. To improvise something that is built, you need an expert. To run something that is already built/improved, you need a machine

The points are:

1. To build a software you need a master, to sustain it you need an expert and to operate it, you need a machine.
2. To build quality you need a master, to improve it you need an expert and to just regress the past, you need a machine

These are phases and need not be necessary done by different people. The skills required diminishes as we traverse the phases (so are complexity)

Build -> Sustain -> Run requires Master -> Expert -> Machine