This white paper explores how service assurance has evolved into automated assurance through the adoption of cross-domain tools. As networks embrace 5G, virtualization, cloud‑native functions, and software‑defined technologies, service assurance has become significantly more complex. Operators now manage fragmented ecosystems spanning multiple network layers, IT domains, and service providers while supporting dynamic, rapidly changing services. The paper explains how traditional assurance approaches struggle in this environment and how cross-domain visibility, analytics, and automation enable proactive, scalable assurance. By transforming siloed monitoring into automated, end‑to‑end assurance, operators can improve service reliability, accelerate innovation, and deliver consistent quality

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