Enhetskrav

Enhetskrav, a Norwegian term for unit requirements, refers to the specific, testable criteria that define how a single component, module, or unit must perform within a larger system. The concept is used across engineering, product development, and regulatory contexts. Enhetskrav are typically derived from higher-level systemkrav and are written to be unambiguous and verifiable.

In practice, enhetskrav guide design, manufacturing, and verification. They cover functional behavior, interfaces with other units, non-functional attributes such as reliability and performance, and regulatory or standard-compliance constraints. They include acceptance criteria, measurement methods, tolerances, operating environments, and maintenance requirements, with clear ownership and traceability to systemkrav.

The development process usually begins with eliciting systemkrav, then decomposing them into enhetskrav for each unit. Teams own different enhetskrav, and verification plans demonstrate that each unit meets its criteria. Changes to systemkrav trigger reassessment of affected enhetskrav to maintain consistency and integrity of the overall design.

Common examples span domains: in electronics, an enhetskrav for a module might specify input voltage range, current draw, and interface signals; in software, a module may require a defined API, error handling behavior, and response time; in construction, a component may have material specs and tolerances.

Challenges include ensuring coverage, avoiding gaps or overlaps between units, and maintaining traceability through revisions and standards compliance.