# Design for reliability
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| ADVREL01: How do you design your advertising workload service architecture around reliability? | 
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 Evaluate architectural approaches for building resilient systems through loosely coupled designs, including SOA, microservices, and event-driven patterns. Define recovery objectives, implement scalable solutions for handling demand fluctuations, and apply chaos engineering to validate system reliability and failure recovery capabilities. 

**Topics**
+ [ADVREL01-BP01 Use loosely-coupled architectures to enable graceful recovery from failures](advrel01-bp01.md)
+ [ADVREL01-BP02 Architect your system with appropriate recovery objectives](advrel01-bp02.md)
+ [ADVREL01-BP03 Architect for variable demand](advrel01-bp03.md)
+ [ADVREL01-BP04 Implement chaos engineering practices](advrel01-bp04.md)