In Vietnam, where there are many young engineers, there are many cases of development without adequate technical guidance.
The problem at the time was that a basic program took more forms of writing than a difficult program.
In case of a difficult program, you yourself investigate many things and the leaders also check. On the other hand, programs that anyone can write are essentially untested.
However, such programs are often used throughout the system, and if you use complex writing, it will later cause errors and incur additional maintenance costs.
To prevent such a situation, it is important to Review Source code in the early stages of development and find problems quickly.