Which of the following would be the MOST beneficial to determine whether a project has met the defined objectives?

Schedule variance measures whether the project is ahead or behind schedule, which is important for project management but doesn't directly assess if the core objectives were met.

Cost variance measures whether the project is over or under budget, which is important for financial health but doesn't directly assess objective achievement.

A Work Breakdown Structure (WBS) is a hierarchical decomposition of the total scope of work to be carried out by the project team; it defines the work, not measures objective attainment.

Key Performance Indicators (KPIs) are quantifiable measures used to evaluate the success of an organization or project in meeting its objectives. By defining and tracking specific KPIs, a project manager can directly assess whether the project has achieved its intended goals and delivered the expected value.