Final answer:
Project constraints are uncertain events or conditions that can affect project objectives. They can have a positive or negative impact and require adjustments to the project plan.
Step-by-step explanation:
Project constraints are uncertain events or conditions that, if they occur, can have a positive or negative impact on one or more project objectives, such as scope, schedule, cost, and quality. These constraints can limit the ability to achieve project goals and may require adjustments to the project plan.
For example, if a project has a budget constraint, it means that the project team must work within a certain financial limitation. This constraint can affect decisions about resource allocation, procurement, and overall project scope.
Therefore, the statement that project constraint is an uncertain event or condition that, if it occurs, has a positive or negative effect on one or more project objectives is true.