Outcome measures are tools used to assess the effect, both positive and negative, of an intervention or treatment1. Outcome measures can indicate whether a change management process has been implemented successfully by comparing the actual results of the change with the expected or desired results2. Outcome measures can also help evaluate the impact of the change on the organization's performance, quality, and value3. The other options are not the best indicators of successful change management implementation. Maturity levels are a way of assessing the degree of development and sophistication of a process, but they do not necessarily reflect the outcomes or benefits of the process4. Degree of control is a measure of how well a process is managed and monitored, but it does not capture the effectiveness or efficiency of the process. Process performance is a measure of how well a process meets its objectives and requirements, but it does not account for the outcomes or consequences of the process. References:
3: https://www.physio-pedia.com/Outcome_Measures
2: https://www.isc.hbs.edu/Documents/pdf/2020-outcome-measurement-feeley.pdf
1: https://en.wikipedia.org/wiki/Outcome_measure
4: https://www.coursera.org/articles/change-management-process
5: https://www.sciencedirect.com/topics/engineering/degree-of-control
6: https://www.sciencedirect.com/topics/engineering/process-performance