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技術的負債の会計学 - PHPカンファレンス広島2025

Avatar for Akinori Takigawa Akinori Takigawa
October 10, 2025
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技術的負債の会計学 - PHPカンファレンス広島2025

参考資料

【翻訳】技術的負債という概念の生みの親 Ward Cunningham 自身による説明 - t-wadaのブログ
https://t-wada.hatenablog.jp/entry/ward-explains-debt-metaphor

A Mess is not a Technical Debt.
https://blog.objectmentor.com/articles/2009/09/22/a-mess-is-not-a-technical-debt

技術的負債の四象限 - Martin Fowler's Bliki (ja)
https://bliki-ja.github.io/TechnicalDebtQuadrant

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Akinori Takigawa

October 10, 2025
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  1. ٕज़తෛ࠴ w ෛ࠴͔ͦ͏͡Όͳ͍͔ͱ͍͏۠ผ͸͋·Γ ҙຯ͕ͳ͘ɺ৻ॏʹߟ্͑ͨͰͷෛ࠴ͳͷ ͔ɺແమ๒ͳෛ࠴ͳͷ͔ͷ΄͏͕େࣄͩɻ w Š.BSUJO'PXMFSٕज़తෛ࠴ͷ࢛৅ݶ .BSUJO'PXMFST#MJLJ KB .BSUJO'PXMFST#MJLJ

    KB ઃܭ͢Δ͕࣌ؒ ͳ͍Μ͔ͩΒ͠ΐ͏͕ͳ͍ ϨΠϠʔԽʁ ͳʹͦΕʁ ΋ͬͱ͜͏͢΂͖ ͩͬͨͳ͋ ࠓ͙͢ϦϦʔε ͠ͳ͍ͱ͍͚ͳ͍ɻ ͋ͱͰͲ͏ʹ͔͠Α͏ ແమ๒ͳ ৻ॏͳ ҙਤతͳ ෆ஫ҙͳ
  2. ٕज़తෛ࠴ w ࠓ೔ͷ࿩͸ӈ্ͷɺʮޙͰͲ͏ʹ͔͠Α ͏ʯͱ͍͏ҙຯͰͷෛ࠴ʹϑΥʔΧε͠ ·͢ ઃܭ͢Δ͕࣌ؒ ͳ͍Μ͔ͩΒ͠ΐ͏͕ͳ͍ ϨΠϠʔԽʁ ͳʹͦΕʁ ΋ͬͱ͜͏͢΂͖

    ͩͬͨͳ͋ ࠓ͙͢ϦϦʔε ͠ͳ͍ͱ͍͚ͳ͍ɻ ͋ͱͰͲ͏ʹ͔͠Α͏ ແమ๒ͳ ৻ॏͳ ҙਤతͳ ෆ஫ҙͳ .BSUJO'PXMFST#MJLJ KB
  3. ࢓෼͚ͷجຊ w आํͱିํʹ͸ඞͣಉֹ͕͘͡Δ w ࢿ࢈ͷ૿Ճ͸आํʹɺݮগ͸ିํʹॻ͘ʢϚΠφε͸൓ରଆʣ w څྉΛݱۚͰ෷ͬͨ৔߹ w आํɿڅྉ ԁʗିํɿݱۚ

    ԁ w څྉ͸අ༻ˢ w ݱۚ͸ࢿ࢈ˣ ˞ࢿ࢈ͱඅ༻͕ಉ͡ଆʹ͋Δͷ͸࠷ॳ͸ҧ࿨ײ͕͋Δ͕ɺยํͷݮগ͕ଞํͷ૿ՃʹͳΔͷͰཧղͰ͖Δ आํ ିํ ࢿ࢈ ෛ࠴ ७ࢿ࢈ आํ ିํ අ༻ ऩӹ རӹ
  4. ٕज़తෛ࠴ΛआΓΔͱ͍͏͜ͱ w ࡶʹ୯७Խ͢Δͱɺຊདྷສԁ͔͔Δ։ൃΛ౰ॳ͸ສԁͰࡁ·ͤͯɺ ສԁ෼͸ޙͰ΍Δͱ͍͏Α͏ʹ͢Δͱɺສԁ෼ͷෛ࠴ΛआΓΔ͜ͱ ʹͳΔ w आํɿιϑτ΢ΣΞ  ԁʗିํɿݱۚ 

    ԁ ିํɿٕज़తෛ࠴  ԁ ʢ͜Ε͸ΞφϩδʔͰɺ࣮ࡍͷ#4ʹٕज़తෛ࠴͸ೖΒͳ͍ɻ࣮ࡍʹ͸ିํ΋आ ํ΋ສԁͰ࢓෼͚Δʣ