The Avaya Diagnostic Methodology (ADM) is an 8-step structured troubleshooting process. The question states that the first three steps (State the Problem, Detail the Findings, Clarify the Problem) have been completed by the customer or partner. The subsequent steps performed by Avaya support involve identifying the root cause and then implementing a solution. Since "Identify the Root Cause" is not provided as an option, the next logical phase in the resolution process from the choices available is "Implement a solution." This step is central to resolving the reported issue before it can be verified and documented.

A. Install a patch to fix the problem.

This is a specific type of solution. The general step is to "Implement a solution," which could also involve a configuration change or other corrective actions.

B. Praise individuals for contribution.

This is the final step (Step 8) in the ADM process, which occurs after the problem has been fully resolved, verified, and documented.

D. Update the Knowledge Management database.

This is Step 7 of the ADM process, performed after a solution has been implemented and successfully verified (Step 6), but before the final step.

1. Avaya Learning, Course 7230XCT, Avaya Aura® Communication Manager and CM Messaging - Embedded Maintenance and Troubleshooting.

Reference: Module on "Avaya Diagnostic Methodology (ADM)". This courseware details the 8-step ADM process, clearly placing "Implement a Solution" as Step 5, which follows the initial problem definition and root cause analysis phases.

2. Official Avaya Partner Training Materials on Avaya Diagnostic Methodology (ADM).

Reference: "Avaya Diagnostic Methodology for BusinessPartners" guide, Section: "The 8 Steps of ADM". The document lists the sequential steps as: 1. State the Problem, 2. Detail the Findings, 3. Clarify the Problem, 4. Identify the Root Cause, 5. Implement a Solution, 6. Verify the Solution, 7. Update Knowledge Management, 8. Praise Individuals. This confirms that implementing a solution is the next major phase after the initial data gathering and analysis.