Engineering Journal
Long-form notes on healthcare systems, payment integrity, and shipping architecture that survives production. This is a preview of the blog layout.
Sampling variability is the natural gap between statistics from different random samples of the same population. The standard error measures how far a sample mean can wobble, and the law of large numbers is why that wobble shrinks as the sample grows.
Simulation builds artificial data with the statistical shape of a world you cannot measure directly. Five methods cover different kinds of uncertainty: Monte Carlo, agents, discrete events, system dynamics, and the bootstrap.
Descriptive statistics summarize the data you have. Inferential statistics carefully extend a sample toward a population. Mixing them up is how dashboards overclaim.
Cloud APIs made systems more format-tolerant—but integrity, performance, interoperability, and storage cost still hang on the contracts you define for files and types.
Both are open-source staples for data work—but they pull in different directions. Here’s a practical way to choose for production systems versus statistical analysis.
How k-means clustering turns customer locations into delivery territories, store partnerships, and route-friendly hubs—and how the elbow method helps you choose k.
A practical walkthrough of positive and negative correlation, coefficient strength bands, and three simple scenarios—salary vs experience, car depreciation, and study hours vs scores.
Pre-pay and post-pay only work together—fast inline scoring for adjudication, deeper retrospective analytics as the feedback loop that keeps the rules honest.
Post-pay recovery fails less from missing rules and more from latency, brittle vendor seams, and claims data that no longer matches adjudication reality.
A practical look at replacing brittle on-prem SSIS packages with Glue jobs without losing operational control of claims extracts.
How enterprise architecture ceremonies stay useful when the real work is still C#, SQL Server, and production claims traffic.