According to the PMBOK Guide, a project issue is a point or matter in question or in dispute, or a point or matter that is not settled and is under discussion or over which there are opposing views or disagreements1. A project risk is an uncertain event or condition that, if it occurs, has a positive or negative effect on one or more project objectives2. A risk response strategy is a specific action or set of actions to be taken to address a risk3. In this scenario, 1600 rpm is a project issue because it is a point of dispute between the risk owner and the project team, as it causes the system to stop working and crash. 1500 rpm is a project risk because it is an uncertain event that, if it occurs, has a negative effect on the project objective of delivering a functional power engine. 1400 rpm is an event that triggers a risk response strategy because it is a specific action taken to reduce the power and brake the engine to avoid the risk of reaching 1500 rpm or 1600 rpm. References: * 1: PMBOK Guide, 6th edition, page 89 * 2: PMBOK Guide, 6th edition, page 720 * 3: PMBOK Guide, 6th edition, page 395