8-Appendix F- SLA Summary Matrices.pdf
PDF 281 KB Posted
- Solicitation number
- RFP 2000004244
- Issued by
- Fairfax County, Virginia
About this file
This is an SLA (Service Level Agreement) Summary Matrices document for RFP 2000004244, establishing performance standards for Next Generation 9-1-1 Core Services (NGCS) and Emergency Services IP Network (ESInet) solutions serving public safety answering points (PSAPs) across Virginia, Maryland, the District of Columbia, and other authorized 911 Authorities. The document outlines comprehensive technical requirements and performance measurements across multiple service dimensions, including network capacity, latency, packet loss, availability, and call delivery metrics. Key performance targets include network latency standards (less than 1 second backbone latency with less than 100 milliseconds internal routing, 2-second POP-to-POP latency, and 50-100 milliseconds POP-to-Endpoints latency), packet loss limits of less than 1 percent target and 2.5 percent maximum, and network convergence time of less than 54 milliseconds at full load.
The agreement establishes system reliability and availability requirements with a target System Availability of 99.999 percent uptime, a Mean Time to Repair (MTTR) of 4 hours for critical faults, and a Mean Time between Failures (MTBF) of 100,000 hours. Call delivery success rate must achieve 99.999 percent to ensure successful call routing to correct PSAPs based on caller location. The ECRF Spatial Interface must support updates within 72 hours of receiving valid GIS data input. Additionally, the contractor must replace any equipment reaching end-of-support status no less than 120 days before the manufacturer's end-of-support date. The document incorporates NENA-INF-016 standards for reliability measurements and requires incident management support responsive to 911 Authority needs based on incident severity and impact levels.
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Other files
| File | Type | Posted |
|---|---|---|
| 7-Appendix E - Narrative Responses.docx | DOCX document | |
| 3-Attachment B.pdf | ||
| 2-Attachment A1-A7.pdf | ||
| 4-Appendix B.pdf | ||
| 1-DPMM Coversheet.pdf | ||
| 5-Appendix C - Technical Requirements.xlsx | XLSX spreadsheet | |
| 9-Appendix G- Interoperability Testing Schedule.pdf | ||
| 6-Appendix D - Cost Proposal.xlsx | XLSX spreadsheet | |
| 10-RFP 2000004244.pdf |
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RFP 2000004244
Appendix F: SLA Summary Matrices
F-1
F-1 SLA Summary and Measurements
For SLA requirements all provisions of the Contract Technical requirements found in Appendix C, including Tab I, Service Agreement, apply.
Criteria Defined By Measurement Notes
NGCS/ESInet Capacity Peak 911 Call Volume Busy Hour of PSAP
Network Latency Latency across backbone network under full-load
Less than 1 second and internal ESInet routing of less than 100 milliseconds (ms)
Point of Presence (POP) to POP Latency
Latency between interconnection facility to another interconnection facility
≤ 2 s
POP to Endpoints Latency between interconnection facility network interface to device at customer’s premise
≤ 5 0–10 0 ms
Packet Loss Maximum end-to-end packet loss across the network for NG9-1-1 call flow at full load
< 1% (target) / < 2.5% (max)
Network Traffic Convergence Network convergence time of IP traffic at any point within the proposed solution
Less than 54 ms
Mean Time to Repair (MTTR) Mean Time to Repair characteristics of the Proposed Solution
≤ 4 hours (critical faults) NENA-INF-016
Mean Time between Failures
(MTBF)
Mean Time between failures of the proposed solution
≥ 100,000 hours (~11 yrs) NENA-INF-016
System Availability Service level offered as a percentage of time when the service is available and the maximum period of total outage before remedies are activated
99.999% MTBF/(MTBF+MTTR)
End-of-Support Equipment Replace any equipment that has reached end of support (EOS)
No less than 120 days before manufacturer’s EOS date
Network and System Availability ESInet, NGCS, and all Functional Elements achieve an uptime as measured by system availability reports
99.999%
F-2
Criteria Defined By Measurement Notes
Call Delivery Success Rate NGCS and all Functional Elements support successful call delivery to the correct PSAP based on the location provided by the OSP
99.999%
ECRF Spatial Interface Support Any valid spatial interface update to the ECRF
Update is completed and in production within 72 hours of receiving a valid data input from a GIS contributor.
Provide incident management support and response to 911 Authority based on the criticality of the incident.
Severity Impact of Figure F-2 ● Critical (No delivery of 911 calls): Initial Response <= 15 minutes, Continuous Resolution until resolved
● High (Degraded 911 call delivery): Initial Response <= 30 minutes, Resolution <= 4 hours
● High-Medium (Delayed 911 call delivery): Initial Response 30 –
60 minutes, Resolution 4 – 8 hours
● Medium (Degraded 911 call delivery): Initial Response <= 1 hours, Resolution <= 12 hours
● Low (Other Impacts): Initial
Response <= 4 hours, Resolution <= 48 hours
Include contact hierarchy and escalation procedures. See additional guidance in Figure F-4.
Additional material information on the incident after the Initial Response should be provided no later than two hours after the Initial Response.
Disaster Recovery and Failover requirements
Processes and procedures on measuring and reporting incidents, including immediate notifications and regularly scheduled reports. The mechanism shall deliver SLA results to the 911 Authority and its designees
● Failover Time <= 5 seconds
● Recovery Time Objective <= 4 hours
● Recovery Point Objective <= 5 minutes
The report shall include all performance items identified in the Selected Offeror’s proposal that includes real-time dashboard.
F-3
Criteria Defined By Measurement Notes monthly and shall provide quarterly SLA review meetings.
● Minimum 7- business day notice for planned maintenance
● Less than 5 minutes of downtime for any change with rollback procedures
SLA Credits Having processes and procedures on how uptime information will be gathered, analyzed and provided to 911 Authority
● For Severity Level of Critical and High incidents, a 10-percent penalty shall be accessed against the monthly recurring fee (MRF) whenever the initial period of resolution is exceeded.
● If the resolution period length of time doubles, then the penalty shall increase to 20 percent of the MRF.
● If the resolution period length of time quadruples the initial period, then 50 percent of the
MRF shall be assessed.
● The amount related to the damages is to be credited to the invoice of each affected 911
Authority the month immediately following the violation
F-4
F-2 Impact vs. Severity Matrix
Figure F-2 defines the classification of 911 call delivery impacts and their associated severity levels. It ensures consistent incident prioritization, escalation, and response expectations among vendors, PSAPs, and the 911 Authority.
Impact Type Description Scope / Extent Severity Level Typical Response Objective
No 911 Call Delivery
Total inability for 911 calls to reach PSAPs; incorrect routing or complete outage.
System-wide or regional (multiple PSAPs)
Critical (S1) 15-minute response, continuous restoration until resolved
Degraded 911 Call Delivery
Calls connect but with impaired function (missing data, one-way audio, intermittent failures).
Multi-PSAP or regional High (S2) 30 min response, 4 hr restoration
Delayed 911 Call Delivery
Calls are delivered successfully but setup time exceeds SLA threshold (e.g., >2 seconds).
Localized subset of calls
High–Medium ( S3)
30–60 min response, 4–8 hr restoration
Intermittent / Partial Loss
Calls affected on certain routes, circuits, or PSAPs; service otherwise available.
One or few PSAPs Medium (S4 ) 1 hr response, 12 hr restoration
Non-Service- Affecting / Minor
No measurable call impact;
cosmetic or administrative issue (reporting, monitoring).
Isolated, no PSAP impact
Low (S5 ) 4 hr response, 48 hr restoration
Figure F- 2 Call Loss Impact vs. SLA Severity Matrix
F-5
F-3 Visual Heat Map
Figure F-3 depicts the relationship of call delivery impacts in the context of the scope of the issue.
Impact Scope → Single PSAP Multiple PSAPs / Region Statewide / Network-Wide
No Call Delivery Critical (S1) Critical (S1) Critical (S1)
Degraded Delivery High (S2) Critical (S1) Critical (S1)
Delayed Delivery High-Medium (S3) High (S2) Critical (S1)
Intermittent / Partial Loss Medium (S4 ) High (S2) Critical (S1)
Non-Service-Affecting Low (S5 ) Low (S5 ) High-Medium (S3)
Legend: Critical (S1) = Red | High (S2) = Orange | High-Medium (S3) = Yellow | Medium (S4) = Blue | Low (S5 ) = Green
Figure F- 3 Impact vs. Scope of Issue
F-6
F-4 Visual Heat Map
Figure F-4 defines the target response and restoration times for incidents based on severity classification. Vendors shall meet or exceed these timeframes in accordance with service level requirements.
Severity Level Target Response Time Target Restoration Time
Severity 1 – Critical 15 minutes ≤ 2 hours – Continuous
Severity 2 – High 30 minutes ≤ 4 hours
Severity 3 – High-Medium 1 hour ≤ 8 hours
Severity 4 – Medium 1 hour ≤ 12 hours
Severity 5 – Low 4 hours ≤ 48 hours / next maintenance window
Figure F-4 Restoration and Response Time Objectives (RTOs)
Notes:
- Response time is measured from initial vendor acknowledgment of the incident.
- Restoration time is measured until full-service functionality is restored.
- Severity levels may be adjusted by mutual agreement based on impact scope or duration.
- Failure to meet these targets may trigger SLA penalties.
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