© Steps Examine each functional unit Identify parameters Explicit input to the functional unit Environmental conditions Characteristics of the system's state 。Test Cases -Specific values of parameters And environmental conditions >校长办公室 >Office of the President¾校长办公室 ¾Office of the President Steps • Examine each functional unit – Identify parameters • Explicit input to the functional unit – Environmental conditions • Characteristics of the system’s state • Test Cases – Specific values of parameters – And environmental conditions