Desing Smells

1. Regidity--The system is hard to change because every change forces many other changes to other parts of the system.
2. Fragility--Changes cause the system to break in places that have no conceptual relationship to the part that was changed.
3. Immobility--It is hard to disentangle the system into components that can be reused in other systems.
4. Viscosity--Doing things right is harder than doing things wrong.
5. Needless Complexity--The design contains infrastructure that adds no direct benefit.
6. Needless Repetition--The design contains repeating structures that could be unified under a single abstraction.
7. Opacity--It is hard to read and understand.It does not express its intent well.