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A CTO always pays his debt - Agile Tour Bordeaux 2017

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## Un CTO paie toujours ses dettes.
La dette technique est l'un des fléaux modernes de nos produits logiciels. Elle s'accumule parfois dans des proportions qui imposent aux équipes techniques de revoir en profondeur la base de code. Il en résulte alors souvent une envie de prise d'otage malheureuse des roadmaps et en conséquence du business... C'est évidemment inenvisageable pour une startup.

Cette présentation montre comment les équipes Videdressing ont cherché à rembourser leur dette technique en priorisant ce chantier de refonte avec les équipes produit. On y parlera de décisions difficiles, de communication à une board d'actionnaires, d'un colocataire legacy monstrueux, de Lean Management et de priorisation par la valeur.

Hervé Lourdin: CTO & co-dirigeant chez Videdressing , adepte et praticien Lean, agiliste pragmatique, Nerd occasionnel. ex Lean & Agile Partner chez @OCTOTechnology. Co-founder of @AppaloosaStore.

Published in: Engineering
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A CTO always pays his debt - Agile Tour Bordeaux 2017

  1. 1. "UN CTO PAIE TOUJOURS SES DETTES."A Story of a Technical Refactoring led the Lean way with Product Mangement! : @HERVELOURDIN - HERVE@VIDEDRESSING.COM
  2. 2. ! HIGH FIVE SPONSORS! 2 — Agile Tour Bordeaux - Videdressing © - 2017
  3. 3. ▸ CTO & Co-dirigeant chez Videdressing ▸ Adepte et praticien Lean, Agiliste pragmatique ▸ Team Builder ▸ Ex Lean & Agile Partner chez @OCTOTechnology ▸ Co-founder of @AppaloosaStore 3 — Agile Tour Bordeaux - Videdressing © - 2017
  4. 4. SAY HI TO JÉRÔME !SENIOR PRODUCT MANAGER AT VIDEDRESSING 4 — Agile Tour Bordeaux - Videdressing © - 2017
  5. 5. A Product Manager always pays his debts. — T. Lanister 5 — Agile Tour Bordeaux - Videdressing © - 2017
  6. 6. A Product Manager CTO always pays his debts. — T. Lanister 6 — Agile Tour Bordeaux - Videdressing © - 2017
  7. 7. AGENDA ▸ Who we are? ▸ Why a Refactor project? ▸ How to communicate about it? ▸ How to prioritize it? ▸ How about the practices? ▸ Learnings & Take-aways 7 — Agile Tour Bordeaux - Videdressing © - 2017
  8. 8. FOREWORDS: 8 — Agile Tour Bordeaux - Videdressing © - 2017
  9. 9. NO RAINBOWS & LITTLE PONIES AT THE END 9 — Agile Tour Bordeaux - Videdressing © - 2017
  10. 10. 1 - WHO WE ARE? 10 — Agile Tour Bordeaux - Videdressing © - 2017
  11. 11. 11 — Agile Tour Bordeaux - Videdressing © - 2017
  12. 12. 12 — Agile Tour Bordeaux - Videdressing © - 2017
  13. 13. LEAN / AGILE ORGANIZATION ▸ Product & Tech teams working on the same floor, 1 common spirit ▸ cross-functional team: PO, front & back developers, Designers ▸ iterative & incremental development: test fast, learn fast, improve ▸ 2 weeks scrumban iterations ▸ Release on the flow ▸ Stakeholders are integrated into projects 13 — Agile Tour Bordeaux - Videdressing © - 2017
  14. 14. 2 - WHY A REFACTORING PROJECT? 14 — Agile Tour Bordeaux - Videdressing © - 2017
  15. 15. A SIMPLE PLUG N' PLAY PROJECT ABOUT A NEW MEAN OF PAYMENT 15 — Agile Tour Bordeaux - Videdressing © - 2017
  16. 16. THE WAY WE LIKE TO SEE OUR PLATFORM 16 — Agile Tour Bordeaux - Videdressing © - 2017
  17. 17. THE WAY IT IS FOR REAL... 17 — Agile Tour Bordeaux - Videdressing © - 2017
  18. 18. THE plug n'Play PROJECT ...TURNED OUT TO BE A COMPLETE FAILURE 18 — Agile Tour Bordeaux - Videdressing © - 2017
  19. 19. 19 — Agile Tour Bordeaux - Videdressing © - 2017
  20. 20. THE 4 HORSEMEN OF THE TECHNICAL APOCALYPSE 20 — Agile Tour Bordeaux - Videdressing © - 2017
  21. 21. (ABNORMAL) COMPLEXITY 21 — Agile Tour Bordeaux - Videdressing © - 2017
  22. 22. BUGS ... LOTS OF BUGS 22 — Agile Tour Bordeaux - Videdressing © - 2017
  23. 23. UNFIXABLE BUGS 23 — Agile Tour Bordeaux - Videdressing © - 2017
  24. 24. OBSOLETE PLATFORM 24 — Agile Tour Bordeaux - Videdressing © - 2017
  25. 25. HEROES(PROBABLY EXHAUSTED) 25 — Agile Tour Bordeaux - Videdressing © - 2017
  26. 26. 3 - HOW TO COMMUNICATE ABOUT A REFOACTORING PROJECT? 26 — Agile Tour Bordeaux - Videdressing © - 2017
  27. 27. HOW TO TELL TO A BOARD? (AND EXPLAIN) 27 — Agile Tour Bordeaux - Videdressing © - 2017
  28. 28. HOW TO TELL ABOUT TECHNICAL DEBT? ▸ Show the effects (the 4 horsemen will help) ▸ Calculate and communicate the financial impact ▸ Come with a plan ▸ Design a business oriented plan 28 — Agile Tour Bordeaux - Videdressing © - 2017
  29. 29. ROADMAP IS Coming 29 — Agile Tour Bordeaux - Videdressing © - 2017
  30. 30. 4 - HOW TO PRIORITIZE SUCH PROJECT? 30 — Agile Tour Bordeaux - Videdressing © - 2017
  31. 31. ▸ Trying to (re)understand how the machine is working 31 — Agile Tour Bordeaux - Videdressing © - 2017
  32. 32. DISTINGUISHING MYTHS FROM REALITY 32 — Agile Tour Bordeaux - Videdressing © - 2017
  33. 33. FAILED AT TRYING TO GET THE TRUTH FROM THE CODE 33 — Agile Tour Bordeaux - Videdressing © - 2017
  34. 34. (RE)-LEARN APPROACH ▸ Interviews ▸ Observation ▸ Technical Analysis 34 — Agile Tour Bordeaux - Videdressing © - 2017
  35. 35. SHARED VOCABULARY & ARCHITECTURE 35 — Agile Tour Bordeaux - Videdressing © - 2017
  36. 36. NEW ORDER MANAGEMENT SYSTEM 36 — Agile Tour Bordeaux - Videdressing © - 2017
  37. 37. THIS PROCESS MAP WAS THE real first“release” OF THE PROJECT ... AND KILL SOME GOOD OLD MYTHS ABOUT IT WAS MEANT TO WORK 37 — Agile Tour Bordeaux - Videdressing © - 2017
  38. 38. ANALYSIS CONCLUSIONS Payment & Order system is our spine. Having a seamless customer experience from online to offline is a physiological need. We must address it in priority. AtoZ rebuild of our payment system & order lifecycle 38 — Agile Tour Bordeaux - Videdressing © - 2017
  39. 39. THE HARD DECISIONS ▸ Stop or postpone other projects ▸ Dedicated TaskForce for next 9 months ▸ No bug fixes on legacy anymore ▸ Accept to decrease the quality of service to improve it afterwards 39 — Agile Tour Bordeaux - Videdressing © - 2017
  40. 40. EXPLAIN EXECUTIVE TEAM & STAKEHOLDERS WE WILL NOT RELEASE BIG FEATURE FOR THE NEXT 9 MONTHS 40 — Agile Tour Bordeaux - Videdressing © - 2017
  41. 41. YES, ROADMAP IS Coming 41 — Agile Tour Bordeaux - Videdressing © - 2017
  42. 42. THE PLAN: PROGRESSIVE REPLACEMENT OF MEANS OF PAYMENT (MOP) FROM THE OLD PLATFORM TO THE NEW ONE 42 — Agile Tour Bordeaux - Videdressing © - 2017
  43. 43. THE PLAN: DEPENDING ON THE BUSINESS IMPACT AND THE POTENTIAL RISK, WE PRIORITIZED THE MOP DEPLOYMENT BY PLATFORM 43 — Agile Tour Bordeaux - Videdressing © - 2017
  44. 44. RELEASE THE LEAN WAY ▸ Slice for the fastest way in production ▸ Mitigate risks with Feature Toggles ▸ ... and Rollback ▸ Do not create all the tools day one (simple spreadsheet is ok) 44 — Agile Tour Bordeaux - Videdressing © - 2017
  45. 45. 45 — Agile Tour Bordeaux - Videdressing © - 2017
  46. 46. THINK ABOUT FEATURE FLIPPING & “FEATURE CAPPING” AT THE BEGINNING OF THE PROJECT 46 — Agile Tour Bordeaux - Videdressing © - 2017
  47. 47. 47 — Agile Tour Bordeaux - Videdressing © - 2017
  48. 48. 5 - MEANWHILE WITH THE TECH & PRODUCT TEAM 48 — Agile Tour Bordeaux - Videdressing © - 2017
  49. 49. 49 — Agile Tour Bordeaux - Videdressing © - 2017
  50. 50. 50 — Agile Tour Bordeaux - Videdressing © - 2017
  51. 51. 51 — Agile Tour Bordeaux - Videdressing © - 2017
  52. 52. MAKE THE PROCESS VISIBLE 52 — Agile Tour Bordeaux - Videdressing © - 2017
  53. 53. SHOW YOUR NUMBERS 53 — Agile Tour Bordeaux - Videdressing © - 2017
  54. 54. CODE REVIEW, CODE REVIEW, NEVER SKIP CODE REVIEW 54 — Agile Tour Bordeaux - Videdressing © - 2017
  55. 55. DEVOPS SUPPORT ▸ Fully Dockerized dev environment ▸ Fresh dataset automation ▸ Keep syncing with master branch whenever you can ▸ Deploy on a testable feature branch 55 — Agile Tour Bordeaux - Videdressing © - 2017
  56. 56. THE LEGACY ROOMATE ▸ Do not feed the monster ▸ Starve the monster whenever it's possible ▸ Separate bundles in the new platform ▸ Make the new services more desireable than the easy (dark) one 56 — Agile Tour Bordeaux - Videdressing © - 2017
  57. 57. 6 - LEARNINGS & TAKE-AWAYS 57 — Agile Tour Bordeaux - Videdressing © - 2017
  58. 58. RESULTS ▸ 95% of orders are now processed on the new system ▸ bug free ▸ easy to track/reconciliate ▸ Very positive impact on Customer Care contact rate 58 — Agile Tour Bordeaux - Videdressing © - 2017
  59. 59. RESULTS ▸ Enabler for Mobile platforms better performance ▸ From 40% to 50% of mobile contribution in sales ▸ The user/order lifecyle is now readable, not only developers 59 — Agile Tour Bordeaux - Videdressing © - 2017
  60. 60. WHAT WE HAVE LEARNED? 60 — Agile Tour Bordeaux - Videdressing © - 2017
  61. 61. MISTAKES ▸ Postponing information to board/exec team on platform state ▸ Took too much time to decide the refactoring ▸ Spent too much energy to solve bugs instead rebuilding ▸ No unified & shared documentation on business process ▸ Stakeholders not enough involved & informed once the project was launched 61 — Agile Tour Bordeaux - Videdressing © - 2017
  62. 62. OTHER LEARNINGS ▸ The monster will not die before long ▸ But you can "contain" it ▸ Mob(ish) programming is cool for tricky design phase ▸ Never skip code reviews 62 — Agile Tour Bordeaux - Videdressing © - 2017
  63. 63. 63 — Agile Tour Bordeaux - Videdressing © - 2017
  64. 64. Merci ! 64 — Agile Tour Bordeaux - Videdressing © - 2017
  65. 65. Q&A 65 — Agile Tour Bordeaux - Videdressing © - 2017
  66. 66. HERVÉ LOURDIN - @HERVELOURDIN FOLLOW US AT @VD_LABS SAY HELLO! AT: HELLO@VIDEDRESSING.COM 66 — Agile Tour Bordeaux - Videdressing © - 2017
  67. 67. 67 — Agile Tour Bordeaux - Videdressing © - 2017
  68. 68. APPENDIX 68 — Agile Tour Bordeaux - Videdressing © - 2017
  69. 69. SOURCES : - https://upload.wikimedia.org/wikipedia/commons/6/64/Bordeaux_place_de_la_bourse_with_tram.JPG - http://static.mensup.fr/photo_article/138906/17843/1200-L-game-of-thrones-saison-7.jpg - http://www.goliards.fr/wp-content/uploads/2012/04/Image-8.png - http://www.splashscore.com/wp-content/uploads/61Q0if5lxPL._SL1100_.jpg - http://cdn.collider.com/wp-content/uploads/2017/04/my-little-pony-friendship-is-magic-season-7-image-3.png - https://lh4.ggpht.com/eEAf4qsZ--nWq3LY1r9JcwgHfdmErHaXdhCFn7DCIGwiprJQzMiXX57GW2I0nKdyZQ=h900 - https://vignette4.wikia.nocookie.net/gameofthrones/images/f/f5/The_Wall.jpg - http://thenewlywedchefs.com/wp-content/uploads/2013/10/DSC_0828.jpg - http://vignette2.wikia.nocookie.net/gameofthrones/images/6/6b/Cersei%27s-WalkofShame-S05E10.jpg - https://images.fineartamerica.com/images/artworkimages/mediumlarge/1/four-horsemen-of-the-apocalypse-victor-vasnetsov.jpg - http://www.stanstedpark.co.uk/public/images/Grounds/Maze_from_above.jpg - https://s11.stc.all.kpcdn.net/share/i/12/9742620/inx960x640.jpg - https://d3dsiivhtdjozj.cloudfront.net/wp-content/uploads/2017/04/27110014/secchioacqua.jpg - https://thedayintech.files.wordpress.com/2013/03/ibm_pc_xt_01_full.jpg - https://images-na.ssl-images-amazon.com/images/S/cmx-images-prod/Item/366144/Previews/1330222e9a6df3b80d8c21ecffc0c600._SX1280_QL80_TTD_.jpg - http://vignette2.wikia.nocookie.net/gameofthrones/images/8/8c/4x06_%D0%92_%D0%96%D0%B5%D0%BB%D0%B5%D0%B7%D0%BD%D0%BE%D0%BC_%D0%B1%D0%B0%D0%BD%D0%BA%D0%B5.png - https://www.newstatesman.com/sites/default/files/styles/nodeimage/public/blogs_2015/06/sean-bean.jpg?itok=zDluvo7Y - http://overloadr.com.br/wp-content/uploads/2015/01/the-incredible-machine.gif - https://pbs.twimg.com/media/C7r6lDQW0AAfA4r.jpg - https://pbs.twimg.com/media/Cm3lYrSWYAAAMC8.jpg - https://img.haikudeck.com/mi/43CDFF6B-975A-4F2B-A3F1-9F47A8B91104.jpg - https://www.newstatesman.com/sites/default/files/styles/nodeimage/public/blogs_2015/06/sean-bean.jpg?itok=zDluvo7Y - http://bob-cfi.weebly.com/uploads/7/6/9/3/7693240/9697687_orig.jpg - https://www.visual-music.org/wp-content/uploads/2016/05/wpid-cymera_20141008_194731.jpg - http://68.media.tumblr.com/4834121a36513822f42beffd94c92c17/tumblr_inline_nhjdn9vP6l1t0ktpa.gif - https://hakanforss.files.wordpress.com/2014/08/resourcevsflowmatrixlean.png - https://spzone-simpleprogrammer.netdna-ssl.com/wp-content/uploads/2010/06/wtfs_per_minute_thumb.jpg - http://thoimoi.vn/stores/news_dataimages/huyenkun/092017/11/06/5648_CONTAINER_STUCKING.jpg - http://ll-c.ooyala.com/e1/hvMXJxYzE6OKFOE-FzgjyIBjt2cm4e0b/promo330138657 - https://static1.squarespace.com/static/55149836e4b0392be719431e/t/555c0454e4b0007db23a164c/1432093782640/Order+delicious+gourmet+takeaway+food+from+Paladarr+from+4pm+onwards+7+days+a+week+9497+5987 - https://media.senscritique.com/media/000006475091/1200/Happy_Tree_Friends.jpg - https://images.dailykos.com/images/324505/story_image/2736667-doh.gif?1478647814 - https://vigilantcitizen.com/wp-content/uploads/2016/08/stranger20.png 69 — Agile Tour Bordeaux - Videdressing © - 2017

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