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The Vasa Redux

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In 1628, the Swedish warship Vasa set off on its maiden voyage from Stockholm harbor towards Poland, where a war was raging in the Baltic. Built by 400 craftsmen at the royal shipyard at Stockholm, the ship was richly decorated as a symbol of the king's ambitions for Sweden and himself. It was 69 meters long and was fitted with 64 cannons, and upon completion, it was of the most powerfully armed vessels in the world of that time. Unfortunately, Vasa was too top heavy and dangerously unstable. Despite the lack of stability, the king was eager to see her in battle and pushed her to sea. On the day of departure, a swelling crowd gathered at the harbor to watch the ship leave. Over a hundred crewmen along with women and children were on board as the crew was permitted to take family and guests along for the first part of the passage. After sailing just 1,300 meters, at the first strong breeze, the ship foundered, leaned over and sank. Around 30 people lost their lives.

This is the story of the Vasa and its parallels to software engineering.

Published in: Technology
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The Vasa Redux

  1. 1. The Vasa Redux Monitorama 2017
  2. 2. The Vasa Redux Monitorama 2017 https://pete.wtf/vasa/
  3. 3. @petecheslock 17th Century Shipbuilding and Your Failed Software Project
  4. 4. @petecheslock Eventually You’ll Ruin Everything and No One Can Help You
  5. 5. @petecheslock You’re probably going to break it. and that is OK.
  6. 6. @petecheslock There are 2 types of Ops People who have fucked up Production People about to fuck up Production
  7. 7. @petecheslock
  8. 8. @petecheslock
  9. 9. @petecheslock
  10. 10. @petecheslock
  11. 11. @petecheslock
  12. 12. @petecheslock
  13. 13. @petecheslock #FlintstoneOps
  14. 14. @petecheslock
  15. 15. @petecheslock
  16. 16. @petecheslock Summary of S3 Service Disruption in US-EAST-1 The Amazon Simple Storage Service (S3) team was debugging an issue causing the S3 billing system to progress more slowly than expected. At 9:37AM PST, an authorized S3 team member using an established playbook executed a command which was intended to remove a small number of servers for one of the S3 subsystems that is used by the S3 billing process. Unfortunately, one of the inputs to the command was entered incorrectly and a larger set of servers was removed than intended. The servers that were inadvertently removed supported two other S3 subsystems.
  17. 17. @petecheslock #FlintstoneOps
  18. 18. @petecheslock
  19. 19. @petecheslock
  20. 20. @petecheslock
  21. 21. https://en.wikipedia.org/wiki/Vasa_(ship)#/media/File:Vasa_stern_color_model.jpg
  22. 22. @petecheslock
  23. 23. @petecheslock Two 108 foot ships I need 4 ships by the end of the sprint! Two 135 foot ships
  24. 24. @petecheslock SCOPE CHANGE!!! Two 108 foot ships One 135 foot ship
  25. 25. @petecheslock
  26. 26. @petecheslock ships_v9_final_FINAL.docx Here is the Final plan. Two 108 foot ships - ASAP Zero 135 foot ships
  27. 27. @petecheslock The Vasa Started as 108 Foot But Ended as 135 Foot This is fine.
  28. 28. @petecheslock No really, THIS is the Final plan. Two 108 foot ships - ASAP Two 120 foot ships ships_v10_final_FINAL_REALLY.docx
  29. 29. @petecheslock No really, THIS is the Final plan. ships_v10_final_FINAL_REALLY.docx Two 108 foot ships - ASAP Two 120 foot ships Two 111 foot ships
  30. 30. @petecheslock TWO GUN DECKS??? ships_v10_final_FINAL_REALLY_TWO_IS_BETTER.docx Two 108 foot ships - ASAP Two 120 foot ships Two 111 foot ships Two 135 foot ships
  31. 31. @petecheslock Scaling Up on Cloud
  32. 32. @petecheslock 32 - 24-Pound guns 
 

  33. 33. @petecheslock 32 - 24-Pound guns 36 - 24-Pound guns, 24 12-Pound guns, 
 8 48-Pound mortars, 10 smaller guns. 

  34. 34. @petecheslock 32 - 24-Pound guns 36 - 24-Pound guns, 24 12-Pound guns, 
 8 48-Pound mortars, 10 smaller guns. many additional revisions later… 30 - 24-Pound guns (lower deck)
 30 - 12-Pound guns (upper deck)
  35. 35. @petecheslock 32 - 24-Pound guns 36 - 24-Pound guns, 24 12-Pound guns, 
 8 48-Pound mortars, 10 smaller guns. many additional revisions later… 30 - 24-Pound guns (lower deck)
 30 - 12-Pound guns (upper deck) 64 - 24-Pound guns (spilt on each deck)
  36. 36. @petecheslock
  37. 37. @petecheslock
  38. 38. @petecheslock Did you just call me lopsided?
  39. 39. @petecheslock
  40. 40. @petecheslock Swedish Foot = 29.69 cm “Stockholm fot”
  41. 41. @petecheslock Swedish Foot = 29.69 cm “Stockholm fot” Amsterdam Foot = 28.3133 cm “Amsterdamse voet” There were 10, 11, 12 or 13 duimen (inches) in a voet, depending on the city's local regulations.
  42. 42. @petecheslock Swedish Foot = 29.69 cm “Stockholm fot” Amsterdam Foot = 28.3133 cm “Amsterdamse voet” Difference = 4.74%
  43. 43. @petecheslock
  44. 44. @petecheslock “God grant that the ship will stand upright on her keel.” Officer Matsson: “The shipbuilder had built ships before and you should not be worried” Admiral Fleming: “The ship is narrow at the bottom and lacks enough belly.” Officer Matsson: “Hold my beer”Admiral Fleming:
  45. 45. @petecheslock
  46. 46. @petecheslock Excessive Schedule Pressures
 
 
 
 
 
 
 
 
 

  47. 47. @petecheslock Excessive Schedule Pressures
 Changing Requirements
 
 
 
 
 
 
 
 

  48. 48. @petecheslock Excessive Schedule Pressures
 Changing Requirements
 No Technical Documentation
 
 
 
 
 
 
 

  49. 49. @petecheslock Excessive Schedule Pressures
 Changing Requirements
 No Technical Documentation
 No Documented Project Plan
 
 
 
 
 
 

  50. 50. @petecheslock Excessive Schedule Pressures
 Changing Requirements
 No Technical Documentation
 No Documented Project Plan
 Excessive Innovation
 
 
 
 
 

  51. 51. @petecheslock Excessive Schedule Pressures
 Changing Requirements
 No Technical Documentation
 No Documented Project Plan
 Excessive Innovation
 Secondary Innovations
 
 
 
 

  52. 52. @petecheslock Excessive Schedule Pressures
 Changing Requirements
 No Technical Documentation
 No Documented Project Plan
 Excessive Innovation
 Secondary Innovations
 Requirements Creep
 
 
 

  53. 53. @petecheslock Excessive Schedule Pressures
 Changing Requirements
 No Technical Documentation
 No Documented Project Plan
 Excessive Innovation
 Secondary Innovations
 Requirements Creep
 Lack of Standards on Measurement
 
 

  54. 54. @petecheslock Excessive Schedule Pressures
 Changing Requirements
 No Technical Documentation
 No Documented Project Plan
 Excessive Innovation
 Secondary Innovations
 Requirements Creep
 Lack of Standards on Measurement
 Lack of Scientific Methods
 

  55. 55. @petecheslock Excessive Schedule Pressures
 Changing Requirements
 No Technical Documentation
 No Documented Project Plan
 Excessive Innovation
 Secondary Innovations
 Requirements Creep
 Lack of Standards on Measurement
 Lack of Scientific Methods
 Launching after Tests Failed

  56. 56. @petecheslock Excessive Schedule Pressures
 Changing Requirements
 No Technical Documentation
 No Documented Project Plan
 Excessive Innovation
 Secondary Innovations
 Requirements Creep
 Lack of Standards on Measurement
 Lack of Scientific Methods
 Launching after Tests Failed
 Failed Tests Never Communicated
  57. 57. @petecheslock Excessive Schedule Pressures
 Changing Requirements
 No Technical Documentation
 No Documented Project Plan
 Excessive Innovation
 Secondary Innovations
 Requirements Creep
 Lack of Standards on Measurement
 Lack of Scientific Methods
 Launching after Tests Failed
 Failed Tests Never Communicated
  58. 58. @petecheslock – George Santayana “Those who cannot remember the past are condemned to repeat it”
  59. 59. @petecheslock
  60. 60. Thank You Monitorama 2017 Oh no! https://pete.wtf/vasa

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