1. Develop the architecture:
   • system architecture - an overall view of system components
   • hardware architecture - the systems hardware components and their interrelations
   • software architecture - the systems software components and their interrelations
   
   
   
2. Investigate and analyze the physical alternatives for the system and choose solutions
   
   
3. Define the external characteristics of the system
   
   
4. Refine the internal structure of the system by decomposing the high-level software architecture
   
   
5. Develop a logical view or model of the systems data

Acknowledgement: MIL-HDBK-338B
US Department of Defence: Electronic Reliability Design Handbook