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‘Can we go live?’ 
Eddy BruinYou can’t know everything, but can become certain
He who knows not and knows not that he knows not, is a fool. Shun him! He who knows not and knows that he knows not, is un...
The 5 orders of ignorance 
0OI = Lack of Ignorance 
I (probably) know something. I have the answer and can explain it. 
1O...
The 5 orders of ignoranceThe game 
Black Stories
Learning comes from experiencing the unexpectedIgnorance is the single greatest impediment to throughput 
Source: Dan Nort...
(1879 –1955) 
Whichhe saidin 1994
Deliberatediscoverypractices 
•Plan in relativemeasures(Shirt sizes, Fibonacci) 
•Leaveopen spaceforquestionsandinvestigat...
Image by Jessica Hagy
A definition of exploratory testing 
“Exploratory testing is simultaneous learning, test design, and test execution.” 
Jam...
A definition of exploratory testing 
“Exploratory testing is simultaneous learning, test design, and test execution, with ...
Rapid Software Testing(RST) 
withJames Bach 
17-19 November 2014 –Breda 
In this training, you will learn: 
•Concise, univ...
Hey, I justmet youAndthisis crazy Sohere’smytwitterSotweetme maybe?! 
@eddybruin 
Big thankstothese guys! 
Dan North –Deli...
You can't know everything, but you can become certain (enough)
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You can't know everything, but you can become certain (enough)

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Using the 5 orders of ignorance I showed testers how they can convince their managers to start testing earlier + I showed them that there is more than just scripting and executing tests.

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You can't know everything, but you can become certain (enough)

  1. 1. ‘Can we go live?’ Eddy BruinYou can’t know everything, but can become certain
  2. 2. He who knows not and knows not that he knows not, is a fool. Shun him! He who knows not and knows that he knows not, is unlearned. Teach him! He who knows and knows not that he knows, is asleep. Awaken him! He who knows and knows that he knows, is enlightened. Follow him! An Arab Proverb quoted by Isabel Lady Burton (1831-1896) in "The Life of Captain Sir Richard F. Burton"
  3. 3. The 5 orders of ignorance 0OI = Lack of Ignorance I (probably) know something. I have the answer and can explain it. 1OI = Lack of Knowledge I don't know something, but I have a well formed question. 2OI = Lack of Awareness I don't know that I don't know something. I have no idea what the right question is. 3OI = Lack of Process I don't know a suitably way to find out I don't know that I don't know something. I have no clue how to find the right idea's to search for the right question. 4OI = Meta-ignorance I don't know about the Five Orders of Ignorance.
  4. 4. The 5 orders of ignoranceThe game Black Stories
  5. 5. Learning comes from experiencing the unexpectedIgnorance is the single greatest impediment to throughput Source: Dan North -Introducingdeliberatediscovery
  6. 6. (1879 –1955) Whichhe saidin 1994
  7. 7. Deliberatediscoverypractices •Plan in relativemeasures(Shirt sizes, Fibonacci) •Leaveopen spaceforquestionsandinvestigations •Exploratorytesting •Specificationworkshops withthe wholeteam •Usabilitytest •Spike & Stabilize •Design forchange •Pair andshare •Challenge yourPO'sknowledge(findthe level of ignorance) •Release early •Integrateearlier •Allthe greatstuff youcameup withandmore…
  8. 8. Image by Jessica Hagy
  9. 9. A definition of exploratory testing “Exploratory testing is simultaneous learning, test design, and test execution.” James Bach, 1995 Test techniques improve result Immediate investigation gives most information Get to know the system
  10. 10. A definition of exploratory testing “Exploratory testing is simultaneous learning, test design, and test execution, with an emphasis on learning.” CemKaner, 2005
  11. 11. Rapid Software Testing(RST) withJames Bach 17-19 November 2014 –Breda In this training, you will learn: •Concise, universal heuristics and models for instant test design •How to tackle any product or product idea instantly •How to analyze a test heuristic or practice •How to test despite ambiguous or missing specifications •How to deal with overwhelming complexity or confusion •How to know when to stop or suspend the test process •How to prepare and deliver atailored test report More info? Subscribe:www.codecentric.nlinformation:events@codecenric.nl “Deze cursus laat je opnieuw tegen het vak testen aankijken. Voor mij als ervaren tester was deze cursus verfrissend en leerzaam.” “RST opentje ogenengeeftje handvatenom eengeweldigetester teworden!”
  12. 12. Hey, I justmet youAndthisis crazy Sohere’smytwitterSotweetme maybe?! @eddybruin Big thankstothese guys! Dan North –Deliberatediscovery http://goo.gl/ke485 Philip Armour–The five orders of ignorance http://goo.gl/LIqn6Y Alan Page –Testers andthe order of ignorance http://goo.gl/cpOGTv Or me:eddy.bruin@codecentric.nl

Using the 5 orders of ignorance I showed testers how they can convince their managers to start testing earlier + I showed them that there is more than just scripting and executing tests.

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