Refining the Ratio Analysis

Basically, refinement leads to purity. Thus to get a cleaner, more understandable and consistent design need to iterate analysis process. 

• Re-examine model to remove inconsistencies, and imbalances with and across model.
• Remove misfit, and wrong ideas from the model.
• Refining occasionally involves restructuring model.
• Define constraints in system in a better way.
• You must keep track of generalizations factored on wrong attributes.
• Include exceptions in model many special cases, lack of ordinary symmetry and an object with two or more than two sets of unrelated attributes or operations.
• You should remove extra objects or associations from model. Also, remove redundancy of objects and their extra attributes.