Software development for me is an art. It needs experience architect with hand-on and practical experience to design an efficient database access. But, most of the time, a lot of peoples started with coding directly, because he/she not able to think ahead,plan or imagine the scope in future.

Sometime/most of the time, the scope of the system and requirements also changing from time to time. Beside we have very experience Business System Analyst.

Therefore, why we need to spend more time in maintenence, it boiled down lack of experience and critical thinking leader, architect, system analyst.