Figure 3.

The components of an inquirer subsystem (within the red box) and initiator subsystem (within the blue box). The components $\mathit{P}{\mathit{A}}_{\mathit{i}\mathit{o}}$, ${\mathit{C}}_{\mathit{i}}$ and ${\mathit{M}}_{\mathit{i}}$ form a monitoring agent (i) with a reporter.