How would you monitor the success of the coaching program?

360° follow-up interviews By re-managing an abbreviated version of the original 360° interviews conducted during the executive evaluation, it is possible to ensure an unambiguous measurement of improvement compared to the 2 or 3 main development objectives specified during the creation of the action plan. This underlines the importance of having well-documented training objectives at the beginning of training.
https://www.businessmentor.expert/how-would-you-monitor-the-success-of-the-coaching-program