Determine the problems of software maintenance

Software maintenance has the below problems:

i)  It is very cumbersome to analyse and understand code written by somebody. 

ii)  No standards for maintenance have been developed and area is comparatively unexplored area.

iii)  Few techniques and tools are available for maintenance. 

iv) It is viewed as a necessary evil and delegated to junior programmers. 

The numerous phases of software development life cycle are strongly coupled, and output of one phase governs activity of the subsequent phase. Therefore all the phases need to be carefully managed and planned and their interaction requires close monitoring. Project management becomes critical in larger systems.