Identify the missing words in the following sentence.

In Agile Project Management (AgilePM/DSDM), the control philosophy recognizes that you cannot fix time, cost, quality, and features simultaneously. Governance is achieved by fixing time and cost (and protecting quality through standards and the Definition of Done) while flexing scope using MoSCoW prioritization. This ensures predictability of delivery cadence and budget, while allowing the team to vary the amount of functionality delivered to meet the agreed constraints. Hence, some contingency must exist in at least one of the four variables—most commonly features—so that the project can respond to emerging information without compromising delivery dates or overspending. The AgilePM Handbook explicitly states: “It is unrealistic to expect all four… can be fixed and controlled… allow flexibility in at least one.” This approach enables incremental delivery, continuous negotiation of scope, and controlled change, ensuring that value is maximized within the agreed time and cost boundaries while maintaining quality. Therefore, the correct completion is “at least one of these variables.”