This sequence represents the most logical and effective approach to implementing a new supplier management process according to ITIL principles. It begins with establishing the governing strategy and policy (Step 1), which is the correct starting point for any process implementation. It then defines critical inputs for the process design: accountability (Step 2), supplier categorization (Step 3), and the supporting information system (SCMIS) (Step 4). Only after these foundational elements are in place is the process itself designed (Step 5), ensuring it is practical and fit for purpose. The final steps involve a structured deployment and crucial integration with other key processes like Service Level Management (Step 7), ensuring alignment and end-to-end value.

A. The policy must be defined before the process is designed. This option incorrectly places process design before the policy that should guide it.

B. Designing the process (step 2) before defining accountability and categorizing suppliers is less effective, as these are critical inputs required for a robust process design.

C. This option starts with a redundant review, follows an illogical sequence (policy after design), and suggests an unrealistic single point of accountability for all global suppliers.

1. ITIL® Service Design (2011 Edition), AXELOS.

Section 4.7.2 (Supplier management policy and strategy): This section emphasizes that the initial step is to create a supplier policy and strategy, which will "contain the rules and guidelines for the IT organization in its dealings with suppliers." This supports Step 1 in option D being the correct starting point.

Section 4.7.5.2 (Supplier categorization): This section details the importance of categorizing suppliers (e.g., strategic, tactical, operational, commodity) to determine the level of management and attention each requires. This activity logically follows the establishment of a policy, as shown in option D.

Section 4.7.5.1 (The supplier and contract management information system (SCMIS)): The SCMIS is described as the central repository for all supplier and contract data. Establishing this system is a key implementation activity that provides the foundation for managing suppliers effectively.

2. ITIL® 4: Create, Deliver and Support, AXELOS.

Section 5.2.10 (Supplier management practice): This practice guide reinforces the need for a "supplier strategy" or "sourcing strategy" that defines the organization's plan for engaging with suppliers. This strategy guides all subsequent activities, including process design and execution, which aligns with the sequence in option D where policy precedes process design. The practice also highlights the importance of defining roles and responsibilities for managing suppliers.