> For the complete documentation index, see [llms.txt](https://stephen-tsoi.gitbook.io/stephen-tsoi-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://stephen-tsoi.gitbook.io/stephen-tsoi-docs/opentelemetry/from-missing-events-to-complete-visibility-tracing-enterprise-transactions-with-opentelemetry/day-25-34-traditional-b2c-architecture.md).
# Day 25/34 Traditional B2C Architecture
In modern enterprise architecture, a diverse ecosystem of specialized third-party products and appliances plays a crucial role in establishing a reliable, stable, scalable, secure, and high-throughput application platform. This platform supports the development of both stateless and stateful applications, catering to Request-Driven Architecture (RDA) and Event-Driven Architecture (EDA) paradigms.
The shift towards EDA, breaking down messages into **real-time** and **asynchronous** events, has significantly enhanced system throughput, scaling from millions of messages to billions of events. However, this sophistication necessitates a more comprehensive approach to monitoring and resolving issues at the data flow level.
This series of posts delves into the intricacies, using an account enquiry request scenario to highlight the limitations of traditional Application Performance Management (APM) tools in meeting distributed tracing requirements. It then demonstrates the adoption of a new OpenTelemetry solution to address this challenge. OpenTelemetry stands as a robust framework for gathering observability data from cloud-native applications, going beyond mere industry jargon to offer practical solutions.
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