ITIL4 and the missing ITSM Life-cycle
ITIL V3 gained popularity from the then newly introduced concept of managing IT Service Management Life-cycle. They saw it as a complete picture and a roadmap to achieving IT business maturity. The framework handed out 5 core books each in-depth, explaining life-cycle stages within IT Services right from the conception stage to recurring improvement and finally a exit to retirement. The V3 framework picture looked
