Network service chaining is a service deployment concept that enables network operators to configure network services dynamically in software without making any changes to the hardware. With software defined networking and network function virtualization, network service chaining is gaining a serious attention in the research community. However, its concept is still vague and advantages are yet not clear. Therefore, in this paper, we discussed an architecture for the orchestration of multiple service chains on the underlying infrastructure and explain the workflow of a service chain. With this architecture, applications can create and manage their service chains independently.