In what portion of a project are risk and opportunities greatest and require intense planning and anticipation of risk events?

During Closing, most work is complete and risks have largely materialized or been resolved, making the risk level at its lowest point in the project lifecycle.

Planning reduces uncertainty by establishing scope, schedules, and budgets, so while risk management is active in Planning, the level of unknowns is lower than in Initiating.

During Initiating, the project scope, schedule, and costs are largely unknown, meaning the number of unknown variables is at its highest and the potential for both positive and negative risk events is greatest. Because detailed planning has not yet occurred, there are fewer constraints and more degrees of freedom, which simultaneously amplifies both threats and opportunities. This phase therefore demands intense anticipation and identification of risk events before commitments solidify.

During Executing, detailed plans exist and work is underway, so the overall uncertainty and risk exposure is lower than in the Initiating phase.