On what basis do you understand that checks should be included in the regression plan?

Checks are included in the regression plan if they cover functionality that may be affected by changes in code, configuration, or infrastructure. Typically, the regression plan includes:

• Critical business functions that must operate without failures.
• Frequently used scenarios to ensure that main paths are not broken.
• Bugs that have been recently fixed to prevent recurrence.
• Integration points with other systems.

The decision to include checks in the regression plan is made based on analysis of changes, risks, and business priorities. If a change affects a specific module or functionality, tests verifying that functionality should be included in the regression plan.