Glossary of Terms
Practical maintenance terms, CMMS language, reliability abbreviations, and plant maintenance definitions in one place.
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399 terms shown
Safety Stock
Safety stock is additional inventory held to protect against uncertainty in spare-parts demand, supplier lead time, or delivery reliability.
Safety-Critical Equipment
Safety-critical equipment is equipment whose failure could cause, permit, or fail to prevent a major safety consequence.
Safety-Critical Maintenance
Safety-critical maintenance is work required to preserve the performance of equipment or functions that prevent or control major safety consequences.
SCADA-CMMS Integration
SCADA-CMMS integration uses industrial control-system alarms, events, readings, or conditions to support maintenance notifications and work.
Scrap Rate
Scrap rate is the percentage of produced material or units that cannot be accepted or economically reworked.
Serialized Spare Part
A serialized spare part is individually identified and tracked using a unique serial number through purchase, storage, installation, repair, removal, and disposal.
Service Level Agreement
A service level agreement, or SLA, defines measurable service expectations such as response time, restoration time, availability, escalation, and reporting.
Setup Time
Setup time is the time required to prepare equipment, tools, materials, settings, and controls before production or maintenance activity begins.
Shaft Alignment
Shaft alignment is the adjustment of connected rotating-machine shafts so their centerlines operate within approved offset and angular tolerances.
Shelf-Life Management
Shelf-life management controls materials that can deteriorate, expire, or become unsuitable while stored.
Shutdown Maintenance
Shutdown maintenance is planned work performed while equipment, a production line, or an entire facility is intentionally taken out of service.
Shutdown Scope Freeze
Shutdown scope freeze is the agreed cut-off after which new work can enter a shutdown only through controlled review and approval.
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