Issues are designed to control requirement modification in processes with preliminary design. These are primary custom requirements which can be excess, inconsistent, incorrect, incomplete, or duplicate. Custom requirements should be transformed into proper formalized requirements.
When performing requirement modification, system can prompt to create a link with the source issue that caused the requirement modification. This technique allows not to get confused in causes of requirement modification, and separates the solution from the particular analyst.
Modification of one part of project documentation violates the integrity of other parts of documentation. For example, requirement modification should not only be implemented in program code, but also reflected in test and operational documentation. Using mechanism of documentation integrity control, you can significantly reduce time needed for maintaining documentation up to date, as well as mitigate risks of human factor.