Since the design phase is complete and the identified risks did not materialize, the project manager should close the risks and update their status in the risk register.

 The project manager should close the risks that did not materialize during the design phase and update their status in the risk register. Closing risks is part of the monitor and close risks process, which involves tracking the implementation of risk responses, monitoring the residual and secondary risks, and evaluating the effectiveness of risk management throughout the project. Closing risks also involves updating the risk register with the current status of the risks, the outcomes of the risk responses, and any lessons learned from the risk management process. Updating the risk register helps to maintain an accurate and updated record of the project risks and their impacts. References: PMI, Project Risk Management, 2nd edition, 2019, p. 97-981