The Procurement sample tutorial will guide you in running the Procurement sample for IBM Business Process Manager Advanced.
The general tasks for building a process application like the one shown in the Procurement tutorial are described in the scenario Developing a straight through process.
The Procurement tutorial starts with a BPEL process that was originally created in IBM® Integration Designer. The tutorial shows how to associate that process with a process application and adapt it so it can be used in the Process Center.
The Procurement sample BPEL process application, which contains
the process you use in the tutorial, is preinstalled and is ready
to run without the need for any modeling or configuration on your
part. You can find the detailed instructions for running this sample
and others on the 
Business Process Management samples web site.
You will find the Procurement sample under "Interactive Samples" in
the navigation pane.