How can one Product Owner be enough to work together with multiple teams?

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How can one Product Owner be enough to work together with multiple teams? I frequently experience the following scenario in organizations: Each team has one so-called Product Owner (PO) or even several PO-helpers/proxies. These so-called POs are doing a lot

Electronic tools (Jira, TFS, …) – curse or blessing?

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Electronic tools (Jira, TFS, …) – curse or blessing? In almost all of my courses are people who use electronic tools e.g., Jira, TFS, Rally in their work. Typically such a tool is used to track bugs, and often it’s