aikaperusteisuutta

Aikaperusteisuutta, literally “time-based basis,” is a concept describing decisions, entitlements, or statuses that are determined primarily by the duration of a condition, event, or relationship rather than by other attributes. The term combines aika (time) with perusteisuus (basis or fundament). In practice, aikaperusteisuus refers to rules where the length of time serves as the key criterion for eligibility, progression, or privileges.

The concept is used across a variety of domains. In public administration and social policy, time-based criteria determine waiting periods for services, eligibility for benefits after a certain period of employment, or the accumulation of rights through continuous residence. In labor law and human resources, length of service or seniority often influences pay progression, promotions, or protections during restructurings. In education or training, progress requirements may depend on having completed a set period of study or internship. In information technology and service design, time-based rules govern access controls, subscription renewals, or trial periods.

Important considerations in applying aikaperusteisuutta include the reliability and transparency of measuring duration, the handling of interruptions or breaks in continuity, and the need to balance fairness between long-standing participants and newcomers. Proponents argue that time-based rules provide predictability, reward loyalty, and promote stability. Critics point out that they can entrench incumbents, reduce flexibility in exceptional circumstances, and disadvantage individuals who experience interruptions beyond their control.

Implementation typically requires clearly defined time thresholds, robust record-keeping, and transparent calculations to ensure consistent application and public trust.