Order the following continual service improvement (CSI) implementation steps into the correct sequence in alignment with the plan, Do, Check, Act (PDCA) model. (1) Allocate roles and…

The sequence 3-1-2-4 correctly maps CSI steps to the PDCA model: step 3 (Identify scope, objectives, requirements) is the Plan phase, step 1 (Allocate roles and responsibilities) is the Do phase, step 2 (Measure and review execution) is the Check phase, and step 4 (Decision on further enhancement) is the Act phase. This mirrors the iterative improvement cycle defined in ITIL CSI guidance.

Sequence 3-4-2-1 places the Act step (4) before the Check step (2) and the Do step (1) last, which violates the PDCA order by acting before measuring.

Sequence 1-3-2-4 puts role allocation (Do) before identifying scope and objectives (Plan), which is illogical because you cannot assign work before defining what the work is.

Sequence 2-3-4-1 starts with measuring and reviewing, which is the Check phase, before planning or doing anything, making it incompatible with the PDCA model.