System design includes usually three main parts: architectural, logical and physical design. We give a short description what do we deliver among those steps.

Outcome:

• System structure – system interrelated components. A key structural issue is minimizing dependencies between these components. This makes it possible to change one component without requiring changes in others.
• System behaviour – Somplete behaviour and life-cycle of the actions. From simple (and measurable) items like timings (latency, response etc) to more complex system behaviour such as auditing, logging, replication etc.

Outcome:

• An abstract representation of the data flows, inputs and outputs of the system.
• Includes entity-relationship model diagram

Outcome:

• The actual input and output processes of the system. This is explained in terms of how data is input into a system, verified, processed, and displayed.
• In physical design, the following requirements about the system are decided:
  • Input requirements
  • Output requirements
  • Storage requirements
  • Processing requirements
  • System control and backup or recovery