Relating to or involving the management and operation of an organization or system.
From administration + -al suffix. Created in the 17th century to describe things connected to the act of administering.
While 'administrative' is far more common today, 'administrational' still appears in specialized legal and academic writing, showing how English speakers have multiple ways to describe the same concept.
Complete word intelligence in one call. Free tier — 50 lookups/day.