What severity levels of problems do you know?

The severity levels of problems are usually classified as follows:

• Blocker (Critical) — an error that completely blocks the system or testing. For example, the application does not start.
• Critical — an error that causes crashes or data loss, but workarounds are available.
• Major — an error that significantly affects functionality but does not block work.
• Minor — an error that does not interfere with work but worsens the user experience (e.g., incorrect text).
• Trivial — cosmetic defects, typos, minor visual discrepancies.

These levels help prioritize bug fixes and plan releases.