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A servant leader is someone who puts the needs of others first and helps them develop and perform to their highest potential. The RTE is a servant leader who listens and supports teams in problem identification and decision-making, by facilitating ART events and processes, communicating with stakeholders, escalating impediments, and helping manage risk. The RTE also leads by example, by demonstrating the Lean-Agile mindset and values, fostering a culture of collaboration and innovation, and driving relentless improvement.

References: Release Train Engineer - Scaled Agile Framework

cumulative flow diagram (CFD) is a graphical tool that shows the status of work items for a given period of time. The horizontal axis represents time, and the vertical axis represents the number of work items. The CFD is composed of different colored bands, each representing a different stage of the workflow (such as “to do”, “in progress”, “done”, etc.). The CFD helps visualize the flow of work, identify bottlenecks, and monitor cycle time and throughput1. A cumulative flow diagram focuses on two main curves: the arrival curve and the departure curve. The arrival curve is the top edge of the “to do” band, and it shows the rate at which new work items are added to the system. The departure curve is the top edge of the “done” band, and it shows the rate at which work items are completed and delivered. The difference between the arrival curve and the departure curve represents the amount of work in progress (WIP) in the system2. By comparing the arrival curve and the departure curve, one can assess the stability and predictability of the system. Ideally, the arrival curve and the departure curve should be parallel and close to each other, indicating a smooth and consistent flow of work. If the arrival curve is steeper than the departure curve, it means that more work is entering the system than leaving it, which can lead to increased WIP, longer cycle time, and lower quality. If the departure curve is steeper than the arrival curve, it means that more work is leaving the system than entering it, which can lead to reduced WIP, shorter cycle time, and higher quality3. References: Cumulative Flow Diagram - Scaled Agile Framework, Cumulative Flow Diagrams - Kanbanize, Cumulative Flow Diagram - LeSS

 The Agile Release Train Sync is a weekly meeting that synchronizes the ART stakeholders and provides visibility into the ART’s progress and impediments1. The Scrum Masters represent their Agile teams, provide updates on their status, relay questions, and help address challenges. They safeguard the team’s needs and effectiveness2. The visibility that Scrum Masters provide during the Agile Release Train Sync is mainly into the progress and impediments of their teams, such as the completion of features, stories, and enablers, the resolution of dependencies, the identification of risks and issues, and the demonstration of value3. The other options are not the primary focus of the Scrum Masters’ visibility during the Agile Release Train Sync. References: Agile Release Train - Scaled Agile Framework, PRACTICE TEST: SAFe 4 Practitioner Certification Flashcards - Brainscape, Agile Release Train Sync Meetings: Maximizing Success - Dee Project Manager

 A User Story is a short description of a piece of functionality that delivers value to a customer or stakeholder. It is typically written from the perspective of an end user and follows the format: “As a , I want , so that ”. User Stories are the primary elements of the Team Backlog and are used to plan and execute the Iteration. User Stories should be small enough to be completed within one Iteration, which is usually two weeks long. If a User Story is too large or complex, it should be split into smaller stories that can fit within the Iteration timebox. This ensures that the team can deliver value frequently and receive feedback quickly. References: SAFe for Teams Student Workbook: materials and exercises from Lesson 3; v6.scaledagileframework.com/story/