The application to integrate with has not yet been purchased or not yet ready
The remote system to integrate with has a heavy cost, not acceptable during the development phase
Multiple teams work in parallel, so we may have some kinds of deadlocks between the teams
As a complete integration framework, Camel provides a very easy way to prototype part of the integration logic. Even if you don't have the actual system to integrate, you can simulate this system (mock), as it allows you to implement your integration logic without waiting for dependencies. The mocking support is directly part of the Camel core and doesn't require any additional dependency.
Along the same lines, testing is also crucial in an integration project. In such a kind of project, a lot of errors can happen and most are unforeseen. Moreover, a small change in an integration process might impact a lot of other processes. Camel provides the tools to easily test your design and integration logic, allowing you to integrate this in a continuous integration platform.