# 1204 暴跌coe

By [hhr](https://paragraph.com/@hhr) · 2021-12-09

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### Structure of a COE

*   What happened?
    
*   What was the impact on customers and your business?
    
*   What was the [root cause](https://wa.aws.amazon.com/wat.concept.rca.en.html)?
    
*   What data do you have to support this?
    
    *   especially metrics and graphs
        
*   What were the critical pillar implications, especially [security](https://wa.aws.amazon.com/wat.pillar.security.en.html)?
    
    *   When architecting [workloads](https://wa.aws.amazon.com/wat.concept.workload.en.html) you make trade-offs between pillars based upon your business context. These business decisions can drive your engineering priorities. You might optimize to reduce [cost](https://wa.aws.amazon.com/wat.pillar.costOptimization.en.html) at the expense of [reliability](https://wa.aws.amazon.com/wat.concept.c-reliability.en.html) in development environments, or, for mission-critical solutions, you might optimize [reliability](https://wa.aws.amazon.com/wat.concept.c-reliability.en.html) with increased [costs](https://wa.aws.amazon.com/wat.pillar.costOptimization.en.html). [Security](https://wa.aws.amazon.com/wat.pillar.security.en.html) is always job zero, as you have to protect your customers.
        
*   What lessons did you learn?
    
*   What corrective actions are you taking?
    
    *   Actions items
        
    *   Related items (trouble tickets etc)
        

5 Whys

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*Originally published on [hhr](https://paragraph.com/@hhr/1204-coe)*