# Technical Data Extraction: Network Performance and Root Cause Analysis
This document provides a comprehensive extraction of the data and trends presented in the provided multi-panel line chart.
## 1. Document Overview
The image consists of three vertically stacked time-series line charts sharing a common X-axis (Time). The charts monitor a Key Performance Indicator (KPI) and two different Root Cause (RC) analysis methodologies over a period of approximately 75 minutes.
## 2. Component Isolation
### A. Header / Top Panel: Alarm KPI
* **Y-Axis Label:** Alarm KPI
* **Y-Axis Scale:** 0.0 to 1.0 (increments of 0.2)
* **Legend:**
* **Yellow Shaded Area:** Packet Loss
* **Red Shaded Area:** Network Interrupt
* **Visual Trend:** The black line represents the KPI. It generally fluctuates between 0.8 and 1.0. There are two sharp, narrow "V-shaped" drops corresponding to the yellow "Packet Loss" regions and one sustained "U-shaped" drop to zero corresponding to the red "Network Interrupt" region.
* **Key Data Events:**
* **Baseline:** Fluctuates between 0.75 and 1.0.
* **Event 1 (Packet Loss):** Sharp drop from ~0.9 to ~0.6, immediate recovery.
* **Event 2 (Packet Loss):** Sharp drop from ~0.95 to ~0.6, immediate recovery.
* **Event 3 (Network Interrupt):** Sustained drop starting at ~01:54, reaching 0.0 at ~01:57, staying at 0.0 until ~02:03, then sharp recovery.
### B. Middle Panel: RC by KPIRoot+ (Root Cause)
* **Y-Axis Label:** RC by KPIRoot+ (Root Cause)
* **Y-Axis Scale:** 0.0 to 1.0 (increments of 0.2)
* **Visual Trend:** This metric shows a slight upward trend from 0.7 to 0.9 over the first hour. It exhibits higher volatility (noise) than the top chart. It mirrors the major "Network Interrupt" drop but shows a more jagged recovery.
* **Key Data Events:**
* **Baseline:** Gradual climb from ~0.72 to ~0.9.
* **Anomalies:** Significant noise/dips around 01:17 and 01:29.
* **Major Event:** Sharp drop at ~01:54, hitting 0.0 at ~01:56. Recovery begins at ~02:03, peaking at 1.0 before settling.
### C. Bottom Panel: RC by KPIRoot
* **Y-Axis Label:** RC by KPIRoot
* **Y-Axis Scale:** 0.0 to 1.0 (increments of 0.2)
* **Visual Trend:** This metric is the most stable of the three during the baseline period, maintaining a tight range between 0.85 and 1.0. It shows the cleanest "flat-bottom" during the network interrupt.
* **Key Data Events:**
* **Baseline:** Very stable around 0.9 - 0.95.
* **Major Event:** Sharp drop at ~01:54. It maintains a flat 0.0 value from 01:57 to 02:03.
### D. Shared X-Axis (Time)
* **Format:** HH:MM
* **Markers:** 00:49, 00:59, 01:09, 01:19, 01:29, 01:39, 01:49, 01:59.
* **Total Duration:** Approximately 00:52 to 02:05.
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## 3. Event Correlation Table
| Time Interval (Approx) | Event Type | Alarm KPI Behavior | RC by KPIRoot+ Behavior | RC by KPIRoot Behavior |
| :--- | :--- | :--- | :--- | :--- |
| 00:52 - 01:21 | Baseline | Fluctuating (0.8-1.0) | Gradual Rise (0.7-0.85) | Stable (~0.9) |
| 01:22 - 01:24 | **Packet Loss** | Sharp drop to 0.6 | Minor dip | Negligible dip |
| 01:32 - 01:34 | **Packet Loss** | Sharp drop to 0.6 | Sharp dip to 0.6 | Negligible dip |
| 01:54 - 02:04 | **Network Interrupt** | Drop to 0.0; sustained | Drop to 0.0; noisy recovery | Drop to 0.0; clean recovery |
## 4. Technical Observations
1. **Sensitivity:** The "Alarm KPI" is highly sensitive to transient "Packet Loss" events (yellow bars), whereas the "RC by KPIRoot" metrics are largely resistant to these short-term fluctuations.
2. **Correlation:** All three metrics are highly correlated during the "Network Interrupt" (red bar), indicating a total system failure that all models successfully captured.
3. **Noise Profile:** "RC by KPIRoot+" (middle) contains significantly more variance/noise during normal operation compared to "RC by KPIRoot" (bottom).
