Exam CCBA topic 1 question 424 discussion

The following chart represents attendance of subject matter experts (SME) and the solution owner for a requirements review and approval meeting held weekly by a business analyst (BA).



The requirements package was approved by the solution owner during the May 30 meeting. After implementation of the solution, the BA learns that the users in SME-3's area are not using the system. Which business analysis activity should the BA have monitored more closely to mitigate this situation?