The release went to production, a defect was found. Who is responsible? Whose problem is this?

In a situation where a defect is discovered after a release to production, it is important to understand that the question of "who is to blame" should not be a priority. The main task is to quickly and effectively fix the problem.

Responsibility for product quality lies with the entire team: developers, testers, managers, and operators. Errors can occur due to insufficient testing, incorrect requirements, or issues in the development and deployment process.

The correct approach is root cause analysis to understand at which stage the failure occurred and to improve processes to prevent recurrence. It is better not to look for who is guilty, but to work on joint quality improvement and communication.