tokens: The SVR shall include after detailed design : 1 . the memory size refined for static code size , static data size and stack size expressed on a thread basis , measuring them per lowest level design component ; 2 . the CPU utilization , refined , considering the worst case execution time of each lowest level design component having its own control flow ( therefore including the call to the protected objects ) ( expressed in time and in percentage of a reference period ) ; 3 . the deadline fulfilment . NOTE The worst case execution time of each lowest level design component having its own control flow is multiplied by the number of times this component is executed per second . The resulting quantity is summed over all other design components . The result is the estimated percentage processor utilization .