This talk explores the use case of SLOs and transforms whilst migration to the serverless ecosystem. The talk starts by presenting the reasons why SLOs are important in the SRE/DevOps framework. Then it presents the challenge our organisation faced when using a very large cross cluster search environment with transforms (technical deep dive on the functionality of transforms in the serverless ecosystem). It then analyses specific use cases of SLOs, the tools used for measuring the efficiency of SLOs and presents the main bottlenecks encountered when defining and adhering to SLOs in the process of migrating to a serverless ecosystem, especially when dealing with burn rates and transforms.