Final answer:
The key aspect that is NOT part of the ITIL® 4 Structure is 'c. Service Lifecycle'. ITIL 4 includes Four Dimensions, the Service Value System, and the Service Value Chain, while the 'Service Lifecycle' is from the previous ITIL v3 framework.
Step-by-step explanation:
The question is about the key aspects under the ITIL® 4 Structure. ITIL 4, which stands for Information Technology Infrastructure Library, provides a practical and flexible basis for managing IT service management. The main answer to the question is that 'c. Service Lifecycle' is NOT a part of the ITIL 4 structure. The other three options are indeed components of ITIL 4.
The four dimensions of ITIL 4 include organizations and people, information and technology, partners and suppliers, and value streams and processes. The Service Value System is a core component that describes how all the components and activities of the organization work together to facilitate value creation through IT-enabled services. The Service Value Chain is a part of the Service Value System and represents the steps to respond to demand and facilitate value creation through IT-enabled services. In contrast, 'Service Lifecycle' was a concept from ITIL v3 and is not included in the ITIL 4 framework.