According to the PMBOK Guide, project closure is the process of finalizing all activities across all of the project management process groups to formally complete the project or phase1. Project closure involves verifying that all the project deliverables have been completed and accepted by the customer or sponsor, confirming that all the contractual obligations have been met, documenting the project performance and lessons learned, releasing the project resources, and archiving the project records2.

In this question, the project manager is faced with a problem that the client will not agree to closure, claiming that the project team has not performed the code inspections mandated in the development contract. The project team has performed the code inspections, however the records are not complete. This indicates that there is a discrepancy between the contractual requirements and the project documentation, which can lead to disputes, claims, or litigation. The project manager should approach this problem by holding a meeting with the project team, project sponsor, and the client to agree to the further work required to close the project and add to lessons learned. This way, the project manager can facilitate a constructive dialogue among the key stakeholders, clarify the expectations and obligations of each party, negotiate a mutually acceptable solution, and document the agreed actions and outcomes. This will also help to maintain the relationship with the client, ensure customer satisfaction, and capture the lessons learned for future projects.

The other options are not the best actions to take to solve this problem. Seeking expert legal advice on the interpretation of the clauses in the contract is a possible option, but it should be done after trying to resolve the issue amicably with the client and the sponsor. Seeking legal advice may also escalate the conflict and damage the trust and goodwill with the client. Closing the project and handing over the deliverables to the client is not advisable, as it may violate the contract terms and expose the project to legal risks. Holding a lessons learned workshop with the project team and project sponsor to avoid contractual compliance issues arising in future projects is a good practice, but it does not address the current issue with the client and the project closure.