Glossary
Plain-English definitions of terms commonly used in third-party maintenance, data center support, and OEM hardware lifecycle management.
- BAA (Business Associate Agreement)
- A written contract required under HIPAA between a covered entity and any vendor that may access protected health information.
- Break-Fix
- Reactive hardware repair performed in response to a failure, as distinct from preventive or software-update support.
- DIMM
- Dual In-line Memory Module — a type of server memory module commonly replaced as part of hardware break-fix support.
- EOL (End-of-Life)
- The date after which an OEM no longer manufactures or actively markets a product, but may still offer limited support.
- EOS (End-of-Sale)
- The date after which an OEM no longer sells new units of a product, though support may continue.
- EOSL (End-of-Service-Life)
- The date after which an OEM no longer offers standard support contracts for a product.
- Firmware
- Low-level software embedded in hardware. Firmware updates are typically distributed by the OEM and may or may not be included in third-party maintenance scope.
- HBA (Host Bus Adapter)
- A network interface card used to connect servers to storage networks, commonly covered under hardware maintenance.
- Incident
- A reported service event requiring provider action. Incident definitions vary by contract and should be explicit in SLA language.
- L1 / L2 / L3 Support
- Tiered support model: L1 triage and initial diagnostic, L2 deeper diagnostic and common resolution, L3 engineering-level escalation.
- MTTR (Mean Time to Repair)
- The average time to restore service after a failure. A meaningful operational metric when measured consistently.
- NOC (Network Operations Center)
- A centralized facility that monitors and responds to infrastructure events. 24/7 NOC coverage is common in enterprise maintenance engagements.
- OEM (Original Equipment Manufacturer)
- The original producer of a hardware product — e.g., Dell, HPE, Cisco, NetApp — as distinct from a third-party maintenance provider.
- Parts Fill Rate
- The percentage of parts requests fulfilled from on-hand inventory within the committed window.
- PSU (Power Supply Unit)
- A server component commonly replaced under hardware maintenance; typically hot-swappable in enterprise-class equipment.
- RFP (Request for Proposal)
- A structured procurement document used to solicit vendor proposals against a defined scope and set of requirements.
- SAN (Storage Area Network)
- A dedicated network providing block-level storage access to servers, commonly included in data center maintenance scope.
- Severity (Sev 1 / Sev 2 / Sev 3)
- An incident-classification scheme used to determine response and resolution commitments. Exact definitions should be explicit in contract SLA language.
- SLA (Service-Level Agreement)
- A written commitment between provider and customer defining service levels, measurement methodology, and remedies.
- SOC 2
- An auditing framework developed by AICPA for evaluating service organization controls. Type I reports attest to design; Type II reports attest to operating effectiveness over a defined period.
- Spare Kit
- Pre-positioned inventory of frequently failing parts, maintained on or near customer sites to reduce mean-time-to-repair.
- TPM (Third-Party Maintenance)
- Hardware support delivered by a provider independent of the OEM, typically covering multiple brands under a single contract.
- Uptime
- The percentage of time a system is available for use. Uptime commitments in a contract should reference measurement methodology and exclusions.
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