Customer churn rates were reported without statistical confidence.

Implemented survival analysis, reducing churn estimate error by 22%.

Sales data presented as raw tables.

Created interactive dashboards that highlighted key trends, increasing stakeholder engagement by 35%.

Survey results lacked weighting.

Applied stratified sampling weights, improving representativeness and decision accuracy.

Quality control relied on manual checks.

Automated statistical process control charts, cutting inspection time by 40%.

Marketing campaign ROI was unclear.

Conducted A/B testing, identifying a 15% lift in conversion rates.