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 correct sequence 3-1-2-4 maps directly to PDCA: step 3 (identify scope and objectives) is the Plan phase where goals are established; step 1 (allocate roles and responsibilities) is the Do phase where the plan is executed; step 2 (measure and review) is the Check phase where results are evaluated against objectives; step 4 (decision on further enhancement) is the Act phase where improvements are approved and the cycle continues.

Sequence 3-4-2-1 places the decision on further enhancement before measuring results, which skips the Check phase and violates the PDCA order.

Sequence 1-3-2-4 places role allocation before identifying scope and objectives, meaning execution begins before planning is complete, reversing Plan and Do.

Sequence 2-3-4-1 starts with measuring, which is the Check phase, and places planning (step 3) second, fundamentally reversing the PDCA cycle.