Final answer:
All options provided (scope changes, project risks, project budget, project schedule) are domains typically managed by project managers. The question does not specify an area that a project manager isn't responsible for from the provided choices, as each is a critical part of project management.
Step-by-step explanation:
The student has asked, "Once a project is underway, the project manager usually is not responsible for effectively managing which of the following?" Given the options, a project manager is typically responsible for effectively managing scope changes, project risks, project budget, and project schedule. Therefore, all the options provided are usually within the project manager's responsibilities. However, if the question implies an area that is least likely to be the project manager's responsibility once the project is underway, it is not clearly stated among the choices. Project managers are integral to controlling changes to the project scope, addressing and mitigating risks, watching over the budget, and ensuring that the project follows the set timeline.
Projects that do not have dedicated staff might challenge team members who may have to juggle multiple tasks, leading to work overload. Clear timelines and deadlines are vital as missing them can lead to the cancellation of a project or significant revenue loss. For instance, an engineering team working on designing a new video game controller needs to meet deadlines to not miss a critical market opportunity. All these elements - scope, risks, budget, and schedule - are crucial in the role of a project manager and can significantly impact the success of a project.