Discuss in details the design principles.

• The design process is free from tunnel vision.
• The design should be observable to the analysis model.
• Design should not reinvent the wheel.
• The design should optimise the logical distance between the software and problem as if it exists in the real world.
• The design should be framed to degrade gently, even when anomalous data, events or operating situations are encountered.
• Design is not coding, coding is not design.
• The design should be valued for quality as it is being formed, not after the fact.
• The design should be reviewed to semantic errors.