Absolute change ΔD on the global dipole moment during a cycle (blue solid); its approximation using the fully stochastic algebraic method (red dashed) and the reduced stochasticity algebraic method (light green dashed). The curves are compared with the absolute change computed with the algebraic method for various sets of the active regions in a cycle. Top panel: subsets containing ARs with the top N highest ultimate dipole contribution (FS case). Bottom panel: subsets containing ARs with the top N highest ARDoR values added to ΔD _RS.