Bad Design

In theory, there is not good or bad architecture / design, only architecture that is more or less able to achieve its intended purpose. Good design is one that meets the quality attributes required by stakeholders, while bad design does not.

Rigidity

When a system is rigid, a change in one part of the system necessitates a change in another part of the system.

Fragility

When a system is fragile, even small changes can cause other parts of the system to break unintentionally.

Immobility

When a system is immobile, parts of the system cannot be easily reused because of tight coupling and complex dependencies.