Experiment Driven Development  The “real” engineering in software            @mikegehard       BS Chemical Engineering    ...
How do you know that changes youmake to your web application are the“right” ones?
What is “right”?
It depends.
What makes or saves my companymoney?
Number of purchasesNumber of new subscriptions
What is your theory about thatmetric?
If you don’t know where you aregoing, how do you know when you getthere?
By providing a larger skip link on thesignup page, we will increase thenumber of purchases withoutsacrificing new subscrip...
A/B Testing while collecting data
Analyze the data without bias.
Leave the egos at the door.
When compared to the control, thelarger skip link increased purchases by5% and did not decrease newsubscriptions.
Surprise?!?!?!?!?!
What’s next?
If you want to know why somethinghappened then propose a newexperiment to collect that data.
Repeat
Propose a theory about businessmetric(s)Experiment and measure thosemetricsAnalyze the data and make a decisionIterate and...
Thank you!@mikegehard
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Experiment Driven Development

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We've all seen TDD and BDD but what about EDD? Experiment driven development is a way of assuring that changes you make to your application actually affect the bottom line of your business.

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Transcript of "Experiment Driven Development"

  1. 1. Experiment Driven Development The “real” engineering in software @mikegehard BS Chemical Engineering MS Software Engineering
  2. 2. How do you know that changes youmake to your web application are the“right” ones?
  3. 3. What is “right”?
  4. 4. It depends.
  5. 5. What makes or saves my companymoney?
  6. 6. Number of purchasesNumber of new subscriptions
  7. 7. What is your theory about thatmetric?
  8. 8. If you don’t know where you aregoing, how do you know when you getthere?
  9. 9. By providing a larger skip link on thesignup page, we will increase thenumber of purchases withoutsacrificing new subscriptions.
  10. 10. A/B Testing while collecting data
  11. 11. Analyze the data without bias.
  12. 12. Leave the egos at the door.
  13. 13. When compared to the control, thelarger skip link increased purchases by5% and did not decrease newsubscriptions.
  14. 14. Surprise?!?!?!?!?!
  15. 15. What’s next?
  16. 16. If you want to know why somethinghappened then propose a newexperiment to collect that data.
  17. 17. Repeat
  18. 18. Propose a theory about businessmetric(s)Experiment and measure thosemetricsAnalyze the data and make a decisionIterate and prosper
  19. 19. Thank you!@mikegehard

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