Jun 25 2025
Update on Data Science versus Statistics
Based on the usage of the terms in the literature, I have concluded that statistics has been subsumed under data science. I view statistics as beginning with a dataset and ending with conclusions, while data science starts with sensors and transaction processing, and ends in data products for end users. Kelleher & Tierney’s Data Science views it the same way, and so do tool-specific references like Gromelund’s R for Data Science, or Zumel & Mount’s Practical Data Science with R.
Brad Efron and Trevor Hastie are two prominent statisticians with a different perspective. In the epilogue of their 2016 book, Computer Age Statistical Inference, they describe data science as a subset of statistics that emphasizes algorithms and empirical validation, while inferential statistics focuses on mathematical models and probability theory.
Efron and Hastie’s book is definitely about statistics, as it contains no discussion of data acquisition, cleaning, storage and retrieval, or visualization. I asked Brad Efron about it and he responded: “That definition of data science is fine for its general use in business and industry.” He and Hastie were looking at it from the perspective of researchers in the field.
Oct 21 2025
From MBO to Hoshin Kanri
In 1995, Peter Drucker conceded that Management By Objectives (MBO) was not “the great cure for management inefficiency” he had believed when he coined the term 41 years earlier. In the meantime, the technique had contributed massively to the decline of American industry by turning managers into metrics gamers.
On 10/7/2025, The Conversation published an article by Aurélien Rouquet, reassuring us that Management by objectives is not a Nazi invention, contrary to what historian Johan Chapoutot claims. Rouquet attributes its paternity to Alfred P. Sloan, the head of General Motors who made it the most powerful company in the world by the end of World War II.
Rouquet’s article also includes a link to another article, dated 9/2/2024, where George Kassar asserts in the title that At 70, management by objectives remains unsurpassed. The most surprising thing, for an article on such a subject, is that it does not cite any company whose performance has been improved by MBO. And the author seems to ignore the existence of an approach that has surpassed MBO for decades, the Hoshin Kanri, which perhaps has the misfortune of coming from Japan.
Contents
Share this:
Like this:
By Michel Baudin • Policies, Uncategorized 1 • Tags: Bridgestone, Hoshin, Hoshin kanri, Hoshin planning, Lean, Strategy, Strategy Deployment, Toyota