What Öykü demonstrated

Built an end-to-end profitability investigation that framed hypotheses, audited the data, wrote correct SQL to analyze regional margins, and isolated the main profit drivers as raw-material inflation, logistics inefficiency, and discounting. The final executive summary translated the analysis into a clear recovery plan, prioritizing logistics, then raw-material hedging and tighter discount controls, with a credible profit-repair narrative.

• Structured Hypothesis Formation
• Leakage-Free KPI and Data Audit Thinking
• Correct SQL Aggregation and Join Logic
• Executive-Level Synthesis