MA-6 MA · Maintenance

Timely Maintenance

LOW ✓ MODERATE ✓ HIGH
3 Enhancements 1 Overlay 9 Related Controls
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Requirements NIST SOURCE

Obtain maintenance support and/or spare parts for [system components] within [time period] of failure.

Discussion (NIST Supplemental Guidance)

Organizations specify the system components that result in increased risk to organizational operations and assets, individuals, other organizations, or the Nation when the functionality provided by those components is not operational. Organizational actions to obtain maintenance support include having appropriate contracts in place.

Enhancements NIST SOURCE

MA-6(1) Preventive Maintenance LOW MODERATE HIGH

Perform preventive maintenance on [system components] at [time intervals].

Discussion

Preventive maintenance includes proactive care and the servicing of system components to maintain organizational equipment and facilities in satisfactory operating condition. Such maintenance provides for the systematic inspection, tests, measurements, adjustments, parts replacement, detection, and correction of incipient failures either before they occur or before they develop into major defects. The primary goal of preventive maintenance is to avoid or mitigate the consequences of equipment failures. Preventive maintenance is designed to preserve and restore equipment reliability by replacing worn components before they fail. Methods of determining what preventive (or other) failure management policies to apply include original equipment manufacturer recommendations; statistical failure records; expert opinion; maintenance that has already been conducted on similar equipment; requirements of codes, laws, or regulations within a jurisdiction; or measured values and performance indications.

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MA-6(2) Predictive Maintenance LOW MODERATE HIGH

Perform predictive maintenance on [system components] at [time intervals].

Discussion

Predictive maintenance evaluates the condition of equipment by performing periodic or continuous (online) equipment condition monitoring. The goal of predictive maintenance is to perform maintenance at a scheduled time when the maintenance activity is most cost-effective and before the equipment loses performance within a threshold. The predictive component of predictive maintenance stems from the objective of predicting the future trend of the equipment's condition. The predictive maintenance approach employs principles of statistical process control to determine at what point in the future maintenance activities will be appropriate. Most predictive maintenance inspections are performed while equipment is in service, thus minimizing disruption of normal system operations. Predictive maintenance can result in substantial cost savings and higher system reliability.

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MA-6(3) Automated Support for Predictive Maintenance LOW MODERATE HIGH

Transfer predictive maintenance data to a maintenance management system using [automated mechanisms].

Discussion

A computerized maintenance management system maintains a database of information about the maintenance operations of organizations and automates the processing of equipment condition data to trigger maintenance planning, execution, and reporting.

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Implementation Guidance

Engineering Interpretation

Original engineering commentary written for this explorer — not NIST source text and not authoritative guidance.

No engineering interpretation has been authored for MA-6 yet. This section is architected to receive it — see the Requirements and Assessment sections above for the authoritative NIST source content in the meantime.

Assessment

NIST SP 800-53A REV 5.2.0

Assessment Objectives

  1. system components for which maintenance support and/or spare parts are obtained are defined;
  2. time period within which maintenance support and/or spare parts are to be obtained after a failure are defined;
  3. maintenance support and/or spare parts are obtained for <MA-06_ODP[01] system components> within <MA-06_ODP[02] time period> of failure.

Examine

[SELECT FROM: Maintenance policy; procedures addressing system maintenance; service provider contracts; service-level agreements; inventory and availability of spare parts; system security plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel with system maintenance responsibilities; organizational personnel with acquisition responsibilities; organizational personnel with information security responsibilities; system/network administrators].

Test

[SELECT FROM: Organizational processes for ensuring timely maintenance].

Overlays

OT/ICS Overlay SP 800-82r3

NIST SP 800-82r3 Appendix F, Table 22. Blank baseline means the control/control enhancement is not selected in that initial OT baseline.

LOW

Not applicable at this tier.

MODERATE

  • Base control: Included (matches standard baseline)

HIGH

  • Base control: Included (matches standard baseline)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for MA-6. This section is architected to display, per product: STIG ID, Finding ID, Severity, Title, Description, Check, Fix, CCI, and NIST control mapping — but nothing is populated here until a real DISA STIG/CCI dataset is ingested.

Learn more about STIG/CCI integration →

Evidence

Potential Evidence — Derived

Categorized from the SP 800-53A "Examine"/"Test" artifact list above by keyword — not an authoritative NIST evidence list.

Policy

  • Maintenance policy
  • system security plan

Configuration

  • inventory and availability of spare parts

Testing

  • Organizational processes for ensuring timely maintenance

Other Records

  • procedures addressing system maintenance
  • service provider contracts
  • service-level agreements
  • other relevant documents or records