,---------------------------.                                                
                                     |Supplemental Specifications|                                                
                                     |---------------------------|                                                
                                     `---------------------------'                                                
                                                                                                                  
                                                                                                                  
            ,----------.   ,------------------.   ,------------------------------.   ,---------------------------.
            |Principles|   |System Constraints|   |System Functional Requirements|   |Non-Functional Requirements|
            |----------|   |------------------|   |------------------------------|   |---------------------------|
            `----------'   `------------------'   `------------------------------'   `---------------------------'
                                                                                                                  
                                        ,----------.   ,--------.                                                 
,---------------.  ,----------------.   |Interface |   |Physical|                                                 
|Design         |  |Implementation  |   |----------|   |--------|                                                 
|---------------|  |----------------|   |Protocol  |   |Location|                                                 
|Architectural  |  |Coding standards|   |Format    |   |Shape   |                                                 
|Infrastructural|  |Language        |   |Schedule  |   |Size    |                                                 
`---------------'  |Resource limits |   |Throughput|   |Weight  |                                                 
                   `----------------'   `----------'   `--------'