Apply their knowledge:

Apply their knowledge:
In software development, there is often some good ideas and principles to guide us to develop a robust, scalable, operation and maintenance procedures, but often we learned later,
does not analyze their own business and situation, not a good use of these in your own code, while only having problems, after a failure (causing serious damage) pain after that,
will learn from their mistakes.
For example, backups can be in operation and maintenance of core services, there are hot standby and cold standby, you develop code in the design and even whether to do support for this program, even if it is later extended to support the achievement of it.