Dimension Analysis — performance_score decomposed

Five structured sub-dimensions of network performance. Read-only analytical layer — does not change the NHI formula.

Dimension scores · this week

Accessibility

Green

−1pt

RACH SR holding; RRC borderline on Config Drifter cohort

Retainability

Amber

−3pts

E-RAB drop rate rising on Aging Macro; RLF events up 12%

Integrity

Amber

−2pts

DL throughput degraded on Capacity Ceiling; CQI declining

Mobility

Amber

−4pts

HO execution failures up on Config Drifter post-upgrade

Availability

Amber

−1pt

Aging Macro HW EoL exposure pulling score down

Dimension deep-dives

Accessibility

Green81

Derived from PM weekly summary

KPIs

RACH Success Rate

98.2%target >98%

RRC Setup Success Rate

97.1%target >99%

E-RAB / PDU Session SR

99.1%target >99%

Access Reject Rate

0.8%target <1%

Ask the agent about Accessibility

Archetype signals driving this dimension

Amber

Config Drifter

RRC SR 96.1% — prachConfigIndex drift causing RACH latency elevation

Red

Persistent Degrader

RRC SR 93.4% — chronic, root cause unclear

Green

High Performer

99.6% — benchmark

Recommended action

Prioritise CM remediation on Config Drifter cohort — prachConfigIndex correction projected to recover RRC SR to >98.5%

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Retainability

Amber58

Derived from PM weekly summary

KPIs

E-RAB Drop Rate

1.4%target <0.5%

RLF Rate

0.9%target <0.5%

RRC Abnormal Release Rate

1.1%target <1%

Drop Call Rate (VoLTE)

0.6%target <1%

Ask the agent about Retainability

Archetype signals driving this dimension

Red

Aging Macro

E-RAB drop 2.1%, RLF 1.8% — HW age + alarm burden

Red

Persistent Degrader

Drop rate 3.2% — chronic, no open tickets

Amber

Capacity Ceiling

RRC abnormal release 1.3% — congestion-driven releases

Green

High Performer

Drop rate 0.1% — benchmark

Recommended action

Aging Macro HW replacement plan is the highest-leverage retainability action — 214 EoL elements account for 38% of estate E-RAB drop events

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Integrity

Amber64

Derived from PM weekly summary

KPIs

DL Throughput (cell avg)

84 Mbpstarget >100 Mbps

UL Throughput (cell avg)

22 Mbpstarget >25 Mbps

CQI Mean

7.2target >8

PDCP Packet Loss Rate

0.08%target <0.1%

Ask the agent about Integrity

Archetype signals driving this dimension

Red

Capacity Ceiling

DL 61 Mbps avg, CQI 6.8 — PRB saturation

Amber

Config Drifter

DL 79 Mbps, declining — scheduling parameter drift

Green

High Performer

DL 118 Mbps, CQI 9.4 — benchmark

Recommended action

38 London South Ericsson cells are the acute integrity risk — carrier aggregation review or small cell densification required within 3–4 weeks

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Mobility

Amber71

Derived from PM weekly summary

KPIs

HO Success Rate

98.1%target >99%

HO Preparation Failure Rate

0.6%target <0.5%

HO Execution Failure Rate

0.9%target <0.5%

Ping-Pong Rate

3.8%target <5%

Ask the agent about Mobility

Archetype signals driving this dimension

Red

Config Drifter

HO exec failure 1.8% — prachConfigIndex drift on target cells elevates RACH-based HO failure

Amber

Aging Macro

HO prep failure 1.1% — neighbour list staleness + legacy SW

Improving

Post-Upgrade Settling

HO SR recovering, +0.4pts this week

Recommended action

CM remediation on Config Drifter cohort will directly recover HO execution failure rate — srPeriodicity and prachConfigIndex correction is the single action with highest mobility impact

Create fleet event

Availability

Amber74

Derived from PM weekly summary

KPIs

Cell Availability

99.1%target >99.5%

Unplanned Downtime %

0.9%target <0.5%

MTTR (avg)

74 mintarget <60 min

HW EoL Exposure

4.6% of estatetarget >3% triggers Amber

Ask the agent about Availability

Archetype signals driving this dimension

Red

Aging Macro

Cell availability 97.8%, MTTR 112 min — HW age driving both

Red

Persistent Degrader

Unplanned downtime 2.1% — field investigation incomplete

Green

High Performer

99.9% availability — benchmark

Recommended action

Huawei EoL procurement decision is the critical path — 214 elements with support expiry in 67 days represent the largest single availability risk

Create fleet event

Which archetypes are driving each dimension's score?

Dimension	High Performer	Capacity Ceiling	Config Drifter	Aging Macro	Post-Upgrade Settling	Persistent Degrader
Accessibility	99	87	76	81	84	61
Retainability	97	72	81	51	78	34
Integrity	91	44	68	61	72	48
Mobility	96	79	58	64	81	52
Availability	99	91	88	49	92	61

≥85 60–84 <60

Dimension scores are derived from the same PM weekly summary used by the NHI model. They do not change the NHI formula — they decompose the performance_score component for diagnostic visibility. All data weekly batch — not real-time.