Cezar chitac the edge of experience
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This document discusses experience and decision making through three case studies. In Case I, decisions were made hastily under time constraints, resulting in fragile code. Case II involved choosing a database, where Cassandra proved better than the initial choice of MySQL. Case III showed benefits of thorough understanding and high test coverage leading to better outcomes. The conclusion advocates questioning assumptions, respecting experience stages, and using diverse teams to gain different perspectives for improved decision making at the "edge of experience."
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Cezar chitac the edge of experience
- 1. THE EDGE OF EXPERIENCE Cezar Chitac
- 2. THE EDGE OF EXPERIENCE • Experience 1.0 • Case study • Context • Key factors • Decision • Outcome • Impact • Experience 2.0
- 3. “ ” GIVE A MAN A FISH AND YOU FEED HIM FOR A DAY; TEACH A MAN TO FISH AND YOU FEED HIM FOR A LIFETIME. Unknown EXPERIENCE 1.0
- 4. EXPERIENCE 1.0 BASICS • What is experience? • The preserved knowledge with regards to an event or subject based on involvement in or exposure to it • Building blocks • Context • Key factors • Decision • Outcome
- 5. EXPERIENCE 1.0 BASICS • Where do we find it? In every moment of our lives… • Knowledge passed through our genes • Growing up and education • Memories of our achievements and failures
- 7. EXPERIENCE 1.0 Process Learn Apply Knowledge Experience
- 8. “ ” LIFE CAN ONLY BE UNDERSTOOD BACKWARDS; BUT IT MUST BE LIVED FORWARDS Soren Kirkegaard CASE I
- 9. CASE I Context • Existing information • Multi-layered Quotation Engine • Web, Services, Pricing & Rules Engine, Databases (DB) • Services payload – action specific • Additionally • Development – first integration phase • Reused DB system – persisting quote entity as a whole
- 10. CASE I Key factors • External • Time constraint • Cost • Magnitude of change • Previous experience • Internal • Availability
- 11. CASE I Decision Initial feeling Actual choice VS
- 12. CASE I Outcome • Later • Fragile code • Unstable service interfaces • Additional security concerns • Maintainability • Exceptional cases • Cascading business logic induced
- 13. “ ” IF YOU DO NOT CHANGE DIRECTION, YOU MAY END UP WHERE YOU ARE HEADING. Lao Tzu CASE II
- 14. CASE II Context • Initial information • Platform product – REST based services • 2 teams – 6 services – 3 months • Specific information – few, vague or lacking • Generic information – service based • Additionally • Goal – tracking & store object information • Technologies available – multiple choices
- 15. CASE II Key factors • External • Time constrained • Requirements • Lacking non-functional requirements • Internal • Lack of knowledge • Experience – MySQL • Unnecessary risks
- 16. CASE II Decision Initial feeling Actual choice VS
- 17. CASE II Outcome • Later • High number of inserts – 1/10 seconds • Future increase – 1/second • Hundreds of thousands of objects • No update operation • Data lifetime • MySQL migration to PostgreSQL • Outcome • Cassandra proved to be the better choice
- 18. “ ” EVERY ACCOMPLISHMENT STARTS WITH THE DECISION TO TRY. Brian Litrell CASE III
- 19. CASE III Context • Existing information • Service using third party regulation engine • No knowledge of regulation domain • Additionally • New regulation engine
- 20. CASE III Key factors • External • Time constraint • Complexity • Domain expertise • Internal • Detailed understanding • High test coverage
- 22. CASE III Outcome • Later • Velocity • 97% test coverage • Low refactoring • 0 issues
- 23. “ ” IT HAS BEEN SAID THAT SOMETHING AS SMALL AS THE FLUTTER OF A BUTTERFLY'S WING CAN ULTIMATELY CAUSE A TYPHOON HALFWAY AROUND THE WORLD Chaos Theory Impact
- 24. IMPACT Cause • Snowball effect • Familiar context • Factors of constraint • Familiar context • Subjective • Partial examination • Factors of constraint • External • Time • Cost • Internal • Comfort zone
- 26. IMPACT Learning Inductive reasoning Deductive reasoning
- 27. “ ” IF YOU CHANGE THE WAY YOU LOOK AT THINGS, THE THINGS YOU LOOK AT CHANGE Wayne Dyer Experience 2.0
- 28. EXPERIENCE 2.0 Reset Learn Apply Knowledge Experience
- 29. EXPERIENCE 2.0 Conclusions • Associative thinking • Subjective perspective • Status Quo • Time • Cost • Respect stages • Mixed teams • Question yourself
- 30. The Edge of Experience