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Ideas Behind Better Decisions

Insights on analytics, data-driven decision-making, and applied research.

Illustrative SQL performance audit comparing a full table scan with a selective indexed query and estimated infrastructure costs.
Data Engineering & Database Analytics

Why Is Your SQL Query So Slow? A Practical Performance Audit Before Buying More Compute

Before paying for more database compute, inspect what your SQL query actually does. A practical audit connects execution plans, indexing, data scans, and cost.

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Working capital waterfall chart reconciling $50,000 in operating income to negative $35,000 in operating cash flow through changes in receivables, inventory, and payables.
Business Analytics & Decision Modeling

Your Business Is Profitable. Why Is Cash Running Out?

A company earns $50,000 but consumes $35,000 in operating cash. Learn how receivables, inventory, payables, and collection delays explain the gap.

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Modeled dashboard refresh cost curve showing the lowest combined refresh and stale-data cost at a four-hour interval.
Data Engineering & Database Analytics

How Often Should You Refresh Your Dashboard? The Business Cost of Stale Data

Should your dashboard refresh every hour, every four hours, or once a day? A worked cost model shows how to balance freshness, infrastructure expense, and decision risk.

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Two sales territory reports comparing revenue assigned using current CRM records and historical effective dates.
Data Engineering & Database Analytics

Your Sales Territory Changed. Why Did Last Quarter's Revenue Move?

A CRM reassignment moves $1,200 between sales territories without changing a single order. Learn how SCD Type 2 and temporal SQL joins preserve historical reporting.

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Comparison of three customer segments showing churn risk, incremental retention lift, and modeled net contribution from retention offers.
Data Science & Marketing Analytics

Your Churn Model Identifies High-Risk Customers. But Who Would Actually Respond to a Retention Offer?

A churn model identifies customers likely to leave, but those customers may not respond to a discount. Learn how uplift modeling, randomized holdouts, and contribution margin improve retention targeting.

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Illustration of a proposed second retail location showing how projected sales are divided between existing-store cannibalization and incremental revenue.
Business Analytics & Decision Modeling

Should You Open a Second Location? Why Projected Sales Can Mislead

A proposed store may generate substantial sales while taking customers from an existing location. Learn how a Huff model separates gross site revenue, cannibalization, and incremental business growth.

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Cost-effectiveness plane showing four hypothetical cost and QALY outcomes, with three scenarios favoring the intervention at a selected threshold.
Health Economics & Decision Modeling

Your Cost-Effectiveness Model Has One ICER. How Certain Is the Decision?

A healthcare model reports an attractive ICER, but uncertain costs and outcomes could change the decision. Learn how probabilistic sensitivity analysis and net monetary benefit reveal the trade-offs.

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Five cumulative A/B test analyses showing early statistical significance followed by no detected difference at the final look.
Marketing & Digital Analytics

Your A/B Test Became Significant Today. Should You Stop It?

An A/B test becomes significant at an early look, then the apparent advantage disappears. Learn why stopping rules matter with a reproducible 50,000-experiment simulation.

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Comparison of Google Search Console AI impressions and GA4 AI Assistant sessions, showing separate visibility and website traffic measurements.
SEO & AI Search Analytics

Why Don't Google Search Console AI Impressions Match GA4 AI Assistant Traffic?

Google reports 420 AI Search impressions while GA4 shows 72 AI Assistant sessions. Learn why these numbers measure different things and how to build a trustworthy AI search dashboard.

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Illustration of three patient timelines showing untreated follow-up before program enrollment and treated follow-up after enrollment.
Healthcare Analytics & Outcomes Research

Why Does a Treatment Look More Effective Than It Is?

A healthcare intervention appears to reduce mortality, but the comparison may be biased before the analysis even begins. Learn how immortal time bias arises, how person-time should be classified, and why observational associations require careful interpretation.

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Comparison of a nightly database snapshot with a change data capture pipeline that sends inserts, updates, and deletes to an analytics warehouse.
Data Engineering & Analytics

Do You Need Change Data Capture, or Is a Nightly Data Refresh Enough?

Should your analytics database refresh nightly or capture changes throughout the day? Compare full refresh, incremental loading, and CDC using a practical 8-million-row example.

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Two inventory forecasting models with identical error scores but different shortage and excess stock costs.
Predictive Analytics & Operations

Which Forecast Accuracy Metric Should You Trust for Inventory Decisions?

Two forecasts have identical 30% WAPE, but one creates $300 in shortage costs while the other creates $30 in excess inventory costs. Learn why accuracy alone cannot determine the best inventory decision.

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