mathematics

Ronald Does

Ronald Does is a mathematics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Ronald Does rather than just read about it. In short: Ronaldus Joannes Michael Maria "Ronald" Does (born 13 January 1955 in Haarlem) is a Dutch mathematician, known for several contributions to statistics and Lean Six Sigma. His research interests include control charts, Lean Six Sigma, and the integration of industrial statistics in services and healthcare.

Key takeaways

Ronald Does belongs to mathematics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Ronald Does to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Ronald Does from memory before moving on to harder problems.

Reference excerpt

Ronaldus Joannes Michael Maria "Ronald" Does (born 13 January 1955 in Haarlem) is a Dutch mathematician, known for several contributions to statistics and Lean Six Sigma. His research interests include control charts, Lean Six Sigma, and the integration of industrial statistics in services and healthcare. Since 1991 he has been holding a full-professorship in Industrial Statistics at the University of Amsterdam, first at its Korteweg-de Vries Institute for Mathematics, and since April 2009 at the department of Operations Management. In 2007 he has been appointed as fellow of the American Society for Quality and in 2014 as fellow of the American Statistical Association. He is the managing director and founder of the Institute for Business and Industrial Statistics of the University of Amsterdam. Since 2011 he has also been director of the Executive Programmes of the University of Amsterdam.

Books "Lean Six Sigma Stap voor Stap" (2008, in Dutch) "Lean Six Sigma for Services and Healthcare" (2012)

References

External links Homepage (Dutch)

Worked examples

Example 1 — a first encounter with Ronald Does

Start with the simplest possible case. Write down what Ronald Does claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In mathematics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Ronald Does before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Ronald Does ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Ronald Does

In research: Ronald Does appears in mathematics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Ronald Does in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Ronald Does is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1955 births, Academic staff of the University of Amsterdam, Dutch mathematicians, so understanding it makes those chapters shorter.
In everyday life: Look for Ronald Does outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Ronald Does in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ronald Does means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Ronald Does out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ronald Does in simple terms?

Why does Ronald Does matter?

Because it connects several mathematics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Ronald Does?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Ronald Does.