The risk manager should use the Delphi method in this situation, as this is a technique that can help resolve differences among experts and reach a consensus on the identified risks and their characteristics. The Delphi method is a tool used to make quick decisions with consensus. This technique consists of sending several sets of anonymous questions to each expert. This is followed by a group discussion after every round. The Delphi method can help the risk manager to solicit the opinions of all experts without revealing their identities. This way, the experts can express their views freely and honestly, without being influenced or intimidated by others. The Delphi method can also reduce personal bias, ego, or emotional conflict among the participants. The risk manager can use the results of the Delphi method to create a list of potential risks and their causes, effects, and probabilities. The other options are not appropriate techniques for the risk manager to use in this situation. Brainstorming is a technique that can help generate ideas and identify risks, but it may not be effective in resolving differences among experts, as it involves open and spontaneous discussion. Focus group is a technique that can help collect requirements and opinions from stakeholders, but it may not be suitable for resolving technical disagreements among experts, as it involves a moderated and structured discussion. Checklist analysis is a technique that can help identify risks based on historical information and lessons learned, but it may not be helpful in resolving differences among experts, as it involves a predefined list of potential risks. References: 3, 4, 5