Your approach should:

1. Contain a plan for the dissemination of the policy across the agency, including timescales for each stage in the process
2. Identify the relevant people/posts involved and their responsibilities
3. Identify and address possible blocks to successful implementation
4. State how the implementation of the policy is to be monitored in the future, identifying; what can be measured, by whom, how and when, the criteria for measuring success and when it will be reviewed and updated.