RPA mission is automation of processes. BPM focus is on process modeling and management. If RPA is done without BPM, it implies unmanaged processes. Unmanaged processes are especially dangerous when they are robotic processes bare of any human control and supervision. Implementing RPA without BPM is direct way to erasing control in an organization.
On another hand, RPA is an ideal environment for implementation of BPM initiatives. It allows for a quick practical structuring of processes in an organization through easy universal scripting of traditional human-centric interfaces. This implicitly initiates a convenient library of business objects suitable for further modeling, modernization and optimization.
In this way, RPA de-facto delivers company-wide process mapping as an essential but often disregarded side effect of its usage. Skillful attention to this aggregated formalization through a prism of BPM allows to integrate legacy processes and IT infrastructure of a company on a modern level of business standards and process control.