Service-Oriented Architecture (SOA) and service-oriented systems, which are built using the SOA paradigm, are now in the stage of widespread adoption, at least according to Gartner's Hype Cycle of Emerging Technologies. Due to the fact that some of the standards for service integration have stabilized, and driven by IT cost savings, organizations are starting to incorporate external software services into their systems, some of which are hosted in the cloud. From a provider perspective, many commercial companies such as Oracle, SAP, Intuit, and Netflix either have cloud-based offerings of their products or run their business completely in the cloud. The special theme of the 5th edition of the PESOS workshop is "Service Engineering for the Cloud." Cloud Computing is shaping the way that organizations acquire and use systems — software-as-a-service (SaaS) model — and how they develop and deploy systems — platform-as-a-service (PaaS) and infrastructure-as-a-service (IaaS) models. Even though cloud platforms and infrastructures are typically designed to scale on demand, the question is whether this automatic elasticity translates to all services deployed on them.