The BA should not rely on a single source of data or a limited observation period to draw conclusions about the effectiveness of a system. The BA should conduct further analysis to ensure that the data is reliable, valid, and representative of the actual situation. The BA should also consider other factors that may affect the demand for the ticket booking service, such as seasonality, promotions, customer preferences, etc. The BA should use a variety of techniques, such as interviews, surveys, data mining, etc., to gather more information and confirm or refute the initial findings. References:

CBAP® Handbook, page 6, section 4. Review the Exam Blueprint

BABOK® Guide, page 35, section 3.2.2. Data Analysis

CBAP / CCBA Certified Business Analysis Study Guide, page 243, section 7.3.2. Data Analysis Techniques