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HMRC internal manual

Compliance Handbook

The One to Many Approach: measuring and evaluating a one to many approach

Following your OTM approach, KAI will help you to analyse the results. This will follow the plan you have already agreed with them at CH600280.

KAI’s evaluation will be based around the success factors you have agreed with them. They will identify significant changes in the results. A significant change is where a large change in results has occurred.  For example a “Significant” result means that out of 100 tests a change would have occurred 95 times due to a cause and 5 times due to coincidence. If a significant change occurred from the time of the OTM approach in the target group but not the control group this infers that the OTM has caused the change.

You will need to evaluate the results of your exercise and make sure that learning points from this evaluation are captured so they can be used in future exercises that may be run. KAI can advise on the best way to do this.