Complexity by Change Frequency
        
            For easier understanding, we can divide the chart into four quadrants.
        
        
        
            - I (Sleepers)
 
            - Operations with high-complexity which are not changed often. Generally, not a problem, but should be watched.
 
            - II (Problems)
 
            - Operations with high-complexity which are also changed often. Consider refactoring.
 
            - III (Unremarkable)
 
            - Operations which are simple and stable.
 
            - IV (Power Horses)
 
            - Operations which are simple and also change often.