What are the Steps required to configure a scenario?

Ans: 1. Create your communication channel.
the communication channel is the means using which XI gets and passes information. XI can understand only XML and so, the communication channels ( or adapters ) do the task of passing XML messages to and from XI. If the message is not in XML format, content conversion is performed at the Adapter.
2. Create your sender and receiver agreement.
Whenever XI is the recipient of some information, you create a sender agreement for the corresponding adapter, sender system and sender interface. Whenever XI is going to send some information to an external system, as the external system is the recipeint of the information, create a receiver agreement for the same.for IDOC and HTTP adapters, no sender agreement is required.
3. Receiver Determination: In this stage, you tell XI, the recipient Interface of the scenario. You can also provide conditions on which the receiver is determined.
4. Interface Determination: The stage where the Inbound Interface and the Interface mapping program are defined. Conditional Interface determination is also possible.