Handbook › Chapter 16 of 16
📚Glossary
A quick reference for the maintenance, reliability, and IoT terms used across Myncel and this Handbook. Grouped by topic for easier scanning.
Core CMMS and maintenance terms
- CMMS — Computerized Maintenance Management System; the category Myncel belongs to.
- EAM — Enterprise Asset Management; a superset of CMMS that adds financial-asset lifecycle and depreciation.
- Asset — any physical thing you maintain. Synonymous with "equipment" or "machine" in Myncel.
- PM — Preventive Maintenance; planned work done at a regular interval to prevent failures.
- PdM — Predictive Maintenance; data-driven maintenance triggered by sensor anomalies or AI.
- CM — Corrective Maintenance; reactive work done after something has broken.
- RCM — Reliability-Centered Maintenance; the methodology for choosing the right mix of PM, PdM, and run-to-failure per asset.
- CBM — Condition-Based Maintenance; a flavor of PdM where work is triggered by a measured condition crossing a threshold.
- TPM — Total Productive Maintenance; a culture/program that involves operators in basic maintenance.
- FMEA — Failure Mode and Effects Analysis; a structured way to identify what can go wrong on an asset.
- RCA — Root Cause Analysis; the post-mortem process for understanding why a failure happened.
- SOP — Standard Operating Procedure; a written, repeatable way of doing a task.
- LOTO — Lockout / Tagout; the safety procedure for de-energizing equipment before work.
- Work Order — the unit of work in Myncel; covers PM, PdM, CM, inspections, safety, and projects.
- Backlog — open work orders not yet completed; backlog age is a useful health metric.
Reliability metrics
- MTBF — Mean Time Between Failures; the average time between consecutive failures of an asset.
- MTTR — Mean Time To Repair; the average labor time to fix a failure (open → close, minus on-hold time).
- MTTF — Mean Time To Failure; for non-repairable items, the average lifetime before failure.
- OEE — Overall Equipment Effectiveness; a composite of Availability × Performance × Quality, expressed as a percentage.
- Availability — the fraction of scheduled time that an asset is up and running.
- PM Compliance — completed-on-time PMs / total PMs in the period.
- Wrench Time — the fraction of a technician's shift spent actually working on equipment (vs. travel, paperwork, waiting).
- Schedule Compliance — completed scheduled work / planned scheduled work in the period.
IoT, control, and protocol terms
- PLC — Programmable Logic Controller; the industrial computer that runs a machine.
- HMI — Human-Machine Interface; the operator-facing screen that talks to the PLC.
- SCADA — Supervisory Control and Data Acquisition; the system that monitors and controls multiple PLCs.
- DCS — Distributed Control System; a SCADA-like system tightly integrated with process equipment.
- OT — Operational Technology; the network of PLCs, HMIs, sensors. Distinct from IT.
- IT/OT convergence — the trend of OT data flowing into IT systems (and CMMS) over standard protocols.
- OPC-UA — Open Platform Communications Unified Architecture; a modern, secure industrial protocol.
- OPC-DA — the older OLE-for-Process-Control standard; legacy but still widely deployed.
- MQTT — Message Queuing Telemetry Transport; a lightweight publish/subscribe messaging protocol popular with IoT.
- Sparkplug B — an MQTT topic-and-payload spec from Cirrus Link / Eclipse, popular for IIoT.
- Modbus — a widely-used industrial serial/TCP protocol for reading PLC registers.
- Ethernet/IP — the CIP-over-Ethernet protocol used by Allen-Bradley / Rockwell.
- BACnet — Building Automation and Control Network; the standard for HVAC and building systems.
- SNMP — Simple Network Management Protocol; standard for IT and network gear.
- APNs — Apple Push Notification service; how iOS push notifications are delivered.
- FCM — Firebase Cloud Messaging; how Android push notifications are delivered.
- SSO — Single Sign-On; logging into multiple apps with one identity provider.
- SAML — Security Assertion Markup Language; the standard SSO protocol used by enterprises.
- OIDC — OpenID Connect; a modern OAuth-based SSO protocol.
- SCIM — System for Cross-domain Identity Management; standard for automated user provisioning.
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