Runtime versus Compiled Business Services with same name

If you define a business service called MyService as a runtime business
service and as a compiled business service, the compiled version executes and
the runtime version is ignored. For clarity, if you migrate a business service
from a runtime version to a compiled version, you should inactivate or delete
the runtime version so that it is clear to all developers that the runtime
version is no longer being used.

Business services may be defined in Siebel Tools and compiled with the .srf
file, or created as runtime business services in the client user interface. The
decision on whether to make a business service compiled or runtime has no
hard and fast rules. It ultimately depends on what you intend the service to
do and how frequently you expect the code in the business service to change.
Runtime business services are not compiled into the .srf file.

The database stores them as records and you can change them at any time. The next time a
runtime service executes, it uses the changes to the definition. This makes
them useful for logic that changes frequently and logic that you need to
change without deploying a new .srf file.

The drawback to a runtime businessservice is that anyone with access to the Business Service Administration view
can see the code. This can pose a security issue.Runtime business services can be useful in a development environment to test frequent changes to scripts by using the business service simulator. Since no
compiling is required, code development may be faster in the runtime
environment. Once the code is complete and tested through the simulator,
the developer can choose whether the business service should remain as a
runtime service or if it should be migrated to Siebel Tools.
Compiled business services are defined in Siebel Tools and represent a
functionality that needs more security and is not likely to change. You must
compile and implement a new .srf file to implement any changes. Because
these business services are compiled, they provide more security than
runtime services and they are faster to load.