Which statement about Start Year modification is true?

• A. The Start Year cannot be changed.
• B. The Start Year can be changed but it is NOT recommended.
• C. The Start Year changes End Year automatically.
• D. The Start Year can be changed and End Year does not get affected.

Answer: (B)

Modifying the Start Year is allowed in the system, but it is not recommended to do so after the model is in production. You can change the first year of the planning horizon, but this kind of adjustment can ripple through the time dimension, affecting period mappings, year-to-year calculations, data loads, and reporting. Such a change often requires reconfiguring End Year, updating data sources, and realigning historical data, which can disrupt existing processes and analytics. Because of these potential impacts, changes to the Start Year should be done only in a controlled environment with thorough testing and a clear data-migration plan.