The Amazon Builders' Library article "Static stability using availability zones" by Becky Weiss and Mike Furr explains how to achieve static stability in systems using availability zones. Static stability refers to a system's ability to function even when some components are impaired or unavailable. This is achieved by separating the control plane (changes to a system) from the data plane (daily business of resources), ensuring that the data plane is scaled independently and can continue to operate even if the control plane is impaired. The article discusses two patterns for achieving static stability: active-active on availability zones, where services are deployed across multiple AZs, and active-standby on availability zones, where some services require a leader node in one AZ while replicated writes go to another AZ. Amazon's EC2 service uses zonal deployment calendars, keeps network traffic local to the AZ, and designs foundational services to be AZ-independent. This design allows for highly available regional services but introduces additional complexity in managing zonal configurations.