▁in ▁a ▁document ▁called ▁the ▁Function al ▁Spec ification ) ▁which ▁are ▁then ▁all ▁built ▁in ▁one ▁go ▁as ▁a ▁collection ▁of ▁solution ▁features ▁typically ▁over ▁a ▁period ▁of ▁three ▁to ▁nine ▁months , ▁or ▁more . ▁These ▁method ologies ▁are ▁obviously ▁quite ▁different ▁approaches , ▁yet ▁they ▁both ▁contain ▁the ▁SD LC ▁phases ▁in ▁which ▁a ▁requirement ▁is ▁born , ▁then ▁travel s ▁through ▁the ▁life ▁cycle ▁phases ▁ending ▁in ▁the ▁final ▁phase ▁of ▁maintenance ▁and ▁support , ▁after - which ▁( typ ically ) ▁the ▁whole ▁life ▁cycle ▁starts ▁again ▁for ▁a ▁subsequent ▁version ▁of ▁the ▁software ▁application . ▁ ▁History ▁and ▁details ▁▁ ▁The ▁product ▁life ▁cycle ▁describes ▁the ▁process ▁for ▁building ▁information ▁systems ▁in ▁a ▁very ▁deliber ate , ▁struct ured ▁and ▁method ical ▁way , ▁re iter ating ▁each ▁stage ▁of ▁the ▁product ' s ▁life . ▁The ▁systems ▁development ▁life ▁cycle , ▁according ▁to ▁Elli ott ▁& ▁Stra chan ▁& ▁Rad ford ▁( 2 0 0 4 ), ▁" origin ated ▁in ▁the ▁ 1 9 6 0 s , ▁to ▁develop ▁large ▁scale ▁functional ▁business ▁systems ▁in ▁an ▁age ▁of ▁large ▁scale ▁business ▁con gl omer ates . ▁Information ▁systems ▁activities ▁revol ved ▁around ▁heavy ▁data ▁processing ▁and ▁number ▁cr unch ing ▁rout ines ". ▁ ▁Several ▁systems ▁development ▁frameworks ▁have ▁been ▁partly ▁based ▁on ▁SD LC , ▁such ▁as ▁the ▁struct ured ▁systems ▁analysis ▁and ▁design ▁method ▁( SS AD M ) ▁produced ▁for ▁the ▁UK ▁government ▁Office ▁of ▁Government ▁Com merce ▁in ▁the ▁