In the context of Project Management Professional (PMP) standards, a negative schedule variance indicates that the project is behind schedule. This is because the earned value (EV) is less than the planned value (PV), meaning the project has completed less work than planned by this point in time123. Despite the project being under budget and quality checks being positive, the negative schedule variance is a critical factor in determining the overall project status. The project manager must address this issue to realign the project with its planned schedule.
References:
Project Management Academy Resources1
Project-Management.info2
Sitemate Resources3

In the context of project management, when a team member or a group of team members raise an issue, the first step for the project manager is to validate the concern. If the issue is valid, it should be documented in the issue log for further action. The issue log is a project management tool used to capture and maintain the details of each issue in the project. It is a document that plays a central role in reducing project risk and is a record of all issues that have been identified or reported in the project, along with their status and resolution.
It's also a communication tool that engages the project team in problem-solving. References: Project Management Articles, Webinars, Project Management Institute

This question belongs to the People domain because it focuses on stakeholder engagement, trust, and two-way communication. PMI's PMP Examination Content Outline includes tasks related to engaging stakeholders, addressing communication needs, and ensuring that feedback is understood and acted upon. PMI communication guidance also emphasizes that simply producing reports is not enough; project managers need communication strategies that generate understanding and engagement.
The best first action is to schedule a direct meeting with the key stakeholder and obtain specific feedback about why the report is not trusted. That approach addresses the concern at its source, encourages dialogue, and helps the project manager identify whether the problem is the content, the format, the timing, or the interpretation of the report. Option A is too indirect and escalatory. Option B is ineffective because changing the format without confirming the issue is only an assumption. Option C is broader than needed and still avoids the direct conversation. PMP-style thinking favors proactive stakeholder engagement, listening, and resolving concerns through direct communication before escalation.

In a situation where a project manager is asked to provide cost estimates for a new decoration project within a short time frame, the best approach would be to contact a subject matter expert (SME) for advice and consultation12. This is because SMEs have the necessary expertise and experience to provide accurate and reliable cost estimates quickly12. They can provide insights into the costs of materials, labor, and other factors that are crucial for the project12. This approach ensures that the cost estimates are as accurate as possible, which is crucial for the success of the project12.
References: = Construction Cost Estimating: A Step-By-Step Guide | Procore, Best Construction Cost Estimate Techniques | Smartsheet

According to the PMBOK Guide, the project manager is responsible for developing the project schedule and estimating the activity durations. One of the tools and techniques for estimating activity durations is decomposition, which involves subdividing the project work packages into smaller, more manageable components called activities. By breaking down the project into smaller tasks, the project manager can better understand the scope, complexity, and dependencies of the work, and apply more accurate and reliable estimation methods. This will also help the project manager to identify and manage the risks and uncertainties associated with the project schedule. Therefore, the project manager should break down the project into smaller tasks and estimate the durations of the activities as the next step. References: PMBOK Guide, 6th edition, pages 191-192, 201-202.