After implementing a solution, which of the following should a technician do NEXT?

Verifying system functionality is a critical step in the troubleshooting process, ensuring that the implemented solution has successfully addressed the original issue and has not introduced new problems. This step confirms the effectiveness of the solution and ensures the system operates as expected.

Documenting the findings is important but typically occurs after verifying the solution's effectiveness and ensuring the problem is resolved.

Determining if anything has changed is part of problem identification and analysis, which occurs before implementing a solution.

Establishing a new theory is done when the current theory fails or the problem remains unresolved, not immediately after implementing a solution.