Glossary

Alphabetical reference of the technical terms used across the Rela AI platform.

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Ably — Real-time messaging service used by Rela AI to deliver instant updates to the dashboard (events, alarms, task statuses) via WebSocket.

Agent — An AI assistant configured to operate on a specific channel (WhatsApp, Email, or HTTP). Each agent has its own system prompt, assigned tools, and behavioral rules.

AHI (Asset Health Index) — A score from 0 to 100 that measures the overall condition of an asset. It combines vibration, temperature, operating hours, and other indicators to estimate the equipment's health status.

Baseline — Normal operating parameters learned from historical data. Serves as a reference to detect deviations and anomalies in an asset's behavior.

CBM (Condition-Based Maintenance) — A maintenance strategy triggered by the actual condition of the equipment (vibration, temperature, wear), rather than following a fixed schedule.

Channel — The communication medium through which an agent interacts with users. Supported channels are WhatsApp, Email, and HTTP (REST API).

Collection — A structured dataset stored on the platform that an agent can query to answer questions or execute actions based on specific information.

Digital Twin — A virtual representation of a physical asset that aggregates all diagnostic data, maintenance history, events, and metrics into a single point of reference.

Drift — A gradual change in a metric over time that deviates from the established baseline. It indicates possible progressive deterioration of the equipment.

Embedding — A vector representation of a text fragment that enables semantic search. Used internally to find relevant information within collections and documents.

Escalation — A notification chain configured for industrial alarms that have not been acknowledged within a specified time frame. Follows the principles of the ISA 18.2 standard.

Event — A signal generated by a machine or industrial system that is received by the platform through an event source. It can represent alarms, measurements, or state changes.

Event source — An entry point for industrial data into the platform. It can be an HTTP webhook, an MQTT broker, or an OPC UA server.

Evolution API — A WhatsApp Business API connector used by Rela AI to link WhatsApp numbers, and send and receive messages through conversational agents.

Extraction — An automated process in which the AI analyzes documents (PDF, images, etc.) and extracts structured data according to a predefined template.

ISA 18.2 — An international standard for industrial alarm management. Rela AI implements its principles for alarm prioritization, escalation, and lifecycle management.

ISO 13374 — An international standard for condition monitoring and machine diagnostics. It defines 6 levels (L1-L6): data acquisition, data manipulation, state detection, health assessment, prognostics, and advisory.

LOTO (Lock Out / Tag Out) — A safety procedure that involves locking and tagging equipment energy sources before performing maintenance tasks, to prevent accidental startups.

MQTT — A lightweight messaging protocol designed for IoT devices and bandwidth-limited networks. Used as an event source to receive data from sensors and PLCs.

OEE (Overall Equipment Effectiveness) — A manufacturing metric that combines three factors: availability (uptime), performance (actual vs. ideal speed), and quality (good parts vs. total). Expressed as a percentage.

OPC UA — An industrial machine-to-machine communication protocol. Enables reading variables and subscribing to events from OPC UA servers directly on the platform.

OTP — A One-Time Password verification code sent via WhatsApp or Email to authenticate a user before granting access to sensitive information.

PLC — Programmable Logic Controller. An industrial device that controls automated processes and can send events to the platform.

Postmark — A transactional email delivery service used by Rela AI to send email notifications (alarm alerts, assigned tasks, reports).

Prognostics — The discipline of predicting the remaining useful life of equipment and anticipating future failures based on historical data, trends, and degradation models.

QoS (Quality of Service) — The delivery guarantee level in the MQTT protocol. Level 0: at most once delivery. Level 1: at least once. Level 2: exactly once.

Rate of Change — The speed at which a metric value changes per unit of time. A high rate of change may indicate accelerated degradation requiring immediate attention.

Real-time — Instant updates delivered via WebSocket that allow users to see changes in the dashboard without needing to refresh the page.

Record — An individual data entry stored within a collection. Each record contains fields defined by the collection schema.

Report — A PDF document dynamically generated from content blocks (text, tables, charts). Agents can create reports as part of their available tools.

RUL (Remaining Useful Life) — An estimate of the remaining hours or cycles before equipment fails or requires maintenance. It is calculated from condition data and degradation models.

Session — The authentication state associated with a conversation between a user and an agent. It determines the access level and visible data during the interaction.

SLA (Service Level Agreement) — Target response and resolution times for tasks and alarms. It allows measuring whether maintenance teams meet established service commitments.

SPC (Statistical Process Control) — Statistical methods to monitor and control processes. It uses control charts with calculated limits to detect abnormal variations in production metrics or equipment condition.

Task — A unit of work assignable to one or more team members. Tasks have statuses (backlog, todo, in progress, done, cancelled) and are managed on a Kanban board.

Template — A blueprint that defines the fields and data structure to extract from documents through the AI-powered extraction process.

Tenant — An organization or company with an isolated space within the platform. All data, agents, and configurations belong to a specific tenant.

Threshold — A configurable limit that triggers an action when a metric crosses it. Used in alarm rules to define when a sensor reading is abnormal (e.g., vibration > 5 mm/s).

Tool — A specific capability assigned to an agent so it can execute concrete actions, such as querying a collection, creating a task, or generating a report.

Webhook — An HTTP endpoint configured to receive events automatically from external systems. Used as an event source and for third-party integrations.

Z-score — The number of standard deviations a value is above or below the mean. A Z-score greater than 3 or less than -3 generally indicates an anomalous value that warrants investigation.