12.1 SRE Principles Versus Organizational Structure12.2 Who Builds It, Who Runs It?12.3 You Build It, You Run It12.4 You Build It, You and SRE Run It12.5 You Build It, SRE Run It12.6 Cost Optimization12.7 Team Topologies12.8 Choosing a Model12.9 A New Role: SRE12.10 SRE Career Path12.11 Communicating the Chosen Model12.12 Introducing the Chosen Model12.13 Summary