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Showing posts with the label math

Door Security Protocol

Door Security Protocol: Find the next number in the sequence 313, 331, 367, ...? This is a test... How long will it take you to work this out... Quite a while is my guess.  And only a few will actually try to figure it out.  Most will give up, a few will search online, and a few will have already seen the sequence recognize it and either remember the answer (the next number in the sequence) or derive it with the sparse knowledge they remember about the sequence. Spoiler Alert!  Let me give you the background knowledge. You know what a Prime Number is - do you recognize that all the numbers in the list are prime? Do you know what a Happy Number is?  Or it's inverse an Unhappy Number?  Well, this is a bit more obscure in the general knowledge.  So here is a spoiler...  all those numbers are happy!  They are Happy Primes! A number is happy when the repeated practice of replacing the number by the sum of the squares...

Velocity Calculus - The mathematical study of the changing software development effort by a team

In the practice of Scrum many people appear to have their favorite method of calculating the team's velocity. For many, this exercise appears very academic. Yet when you get three people and ask them you will invariability get more answers than you have belly-buttons. Velocity—the rate of change in the position of an object; a vector quantity, with both magnitude and direction. “C alculus is the mathematical study of change.”  — Donald Latorre  This pamphlet describes the method I use to teach beginning teams this one very important Scrum concept via  a photo journal simulation. Some of the basic reasons many teams are "doing it wrong"... (from my comment on Doc Norton's FB question:  Hey social media friends, I am curious to hear about dysfunctions on agile teams related to use of velocity. What have you seen? mgmt not understanding purpose of Velocity empirical measure; teams using some bogus statistical manipulation called an average ...

A look at Six Years of Blogging Stats

What do you get from six years of blogging about Agile/Scrum and your continued learning experiences? Stats from Agile Complexification Inverter blog site Well the stats are just one insignificant measure of what one gets from writing about their experience. The more meaningful measures have been seeing some of these articles and resources put into practice by other colleagues, discussion that have happened (off line & sometimes in comments or twitter, etc.) with readers that require me to refine my thinking and messaging of my thinking.  Interestingly some times seeing a resource that you have created being "borrowed" and used in another persons or companies artifact without attribution is both rewarding and a bit infuriating.  I like that the concept has resonated well with someone else and they have gone to the trouble of borrowing the concept, and repeating or improving or repurposing the concept. Let me borrow someone else's concept:  "The Ba...