Business performance · Analytics · Decision-making
Learn to turn data
into decisions.
For aspiring analysts and business teams who want to explain performance, build trusted KPIs and choose the next action with evidence.
The approach
Business questions first.
Learn through worked examples, transparent assumptions and reproducible methods. Explore how SQL, BI and Python support KPI governance, performance analysis and operational improvement.
Case study
Follow an end-to-end illustrative performance scorecard: synthetic data, SQL, calculations, and limitations.
Explore the case study → 02Learn by doing
Structured beginner lessons with objectives, sample data, exercises and clear explanations.
Browse lessons → 03Articles
Practical notes on metrics, SQL, dashboards and consulting methods.
Read articles →Evidence before claims
Good analysis separates what the data shows from what we think it means.
Examples are clearly labelled as illustrative, synthetic or verified. Assumptions and limitations stay visible.
Read how I work →Featured case study