Comprehensive Data Analysis Portfolio
JOSEPH NJUE
Data Analytics Portfolio – Joseph Njiru
Overview
This portfolio demonstrates my ability to perform structured data analysis in operational environments, focusing on performance diagnostics, KPI tracking, and workflow optimization.
Skills Demonstrated
SQL (joins, aggregations, analysis)
Python (Pandas for data analysis)
Excel / Google Sheets (KPI dashboards)
Statistical reasoning (variance, sampling)
Root Cause Analysis (RCA)
Performance analytics (SLA, throughput, accuracy)
Projects
1. Operational Performance Analysis
Analyzing worker performance to identify inefficiencies.
2. KPI Dashboard
Tracking key operational metrics using Excel.
3. Workflow Bottleneck Analysis
Identifying delays in multi-stage workflows.
4. Sampling & Accuracy Analysis
Improving reliability of performance measurement.
Tools
SQL, Python, Excel
Objective
To demonstrate the ability to move beyond reporting into diagnosis and insight generation.
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Posted Apr 20, 2026
Demonstrated structured data analysis in KPI tracking and workflow optimization.
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