The operating model of a human capital management platform defines how people run it: who owns employee information, who decides policy, who handles requests, and who resolves failures. Without those responsibilities, a platform can hold accurate-looking records while teams disagree about which value is authoritative or who should fix a problem.
The distinction becomes visible during change. A company can configure a promotion form in software, but it still needs to decide who authorizes the promotion, who checks the effective date, and who confirms that dependent systems receive the result. The operating model turns those decisions into repeatable responsibilities.