changed ▁between ▁systems ▁and ▁the ▁attributes ▁of ▁that ▁exchange . ▁SV - 7 ▁Systems ▁Me asures ▁Matrix ▁ ▁The ▁measures ▁( met rics ) ▁of ▁Systems ▁Model ▁elements ▁for ▁the ▁appropriate ▁time frame ( s ). ▁SV - 8 ▁Systems ▁E volution ▁Description ▁ ▁The ▁planned ▁increment al ▁steps ▁toward ▁migr ating ▁a ▁suite ▁of ▁systems ▁to ▁a ▁more ▁efficient ▁suite , ▁or ▁toward ▁evol ving ▁a ▁current ▁system ▁to ▁a ▁future ▁implementation . ▁SV - 9 ▁Systems ▁Technology ▁& ▁Sk ills ▁Fore cast ▁The ▁emer ging ▁techn ologies , ▁software / hard ware ▁products , ▁and ▁skills ▁that ▁are ▁expected ▁to ▁be ▁available ▁in ▁a ▁given ▁set ▁of ▁time ▁frames ▁and ▁that ▁will ▁affect ▁future ▁system ▁development . ▁SV - 1 0 a ▁Systems ▁R ules ▁Model ▁ ▁One ▁of ▁three ▁models ▁used ▁to ▁describe ▁system ▁functionality . ▁It ▁ident ifies ▁constraints ▁that ▁are ▁im posed ▁on ▁systems ▁functionality ▁due ▁to ▁some ▁aspect ▁of ▁system ▁design ▁or ▁implementation . ▁SV - 1 0 b ▁Systems ▁State ▁Trans ition ▁Description ▁One ▁of ▁three ▁models ▁used ▁to ▁describe ▁system ▁functionality . ▁It ▁ident ifies ▁responses ▁of ▁systems ▁to ▁events . ▁SV - 1 0 c ▁Systems ▁Event - Trace ▁Description ▁One ▁of ▁three ▁models ▁used ▁to ▁describe ▁system ▁functionality . ▁It ▁ident ifies ▁system - specific ▁ref in ements ▁of ▁critical ▁sequences ▁of ▁events ▁described ▁in ▁the ▁Oper ational ▁View point . ▁ ▁Creating ▁an ▁integrated ▁architecture ▁using ▁Do D AF ▁ ▁The ▁DO D AF ▁ 2 . 0 ▁Arch itect s ▁Guide