The document presents a performance analysis of a Business-to-Consumer (B2C) system for an Indonesian airline, utilizing Service-Oriented Architecture (SOA) and an Enterprise Service Bus (ESB) for integration. It discusses the complexity of system integration in airline services, evaluates the strengths and weaknesses of the implemented solutions, and measures the performance of different service components. The findings suggest that using ESB for managing n-to-n integration offers significant advantages in flexibility and efficiency within a diverse communication environment.