oos

OOS is an acronym used across various fields to denote that something is not currently available or within required parameters. The exact meaning depends on context.

Out of stock: In retail and inventory management, OOS indicates that a product is not available for sale because stock has run out or is delayed. Consequences include lost sales, backorders, and substitution; organizations use forecasting, safety stock, and automated alerts to reduce OOS events.

Out of service: In operations, telecommunications, transportation, and IT, OOS signals that a system, device, or service is temporarily unavailable for use due to maintenance, fault, or testing. It informs users and scheduling that the asset should not be relied upon.

Out of specification: In manufacturing, quality assurance, and laboratory testing, OOS means results fall outside predefined specification limits. This triggers investigations, disposition decisions, and corrective actions to ensure compliance and product quality.

Other notes: The acronym is not universally standardized; the intended meaning is determined by context. In documentation, it is often clarified on first use to avoid ambiguity.