質とスピード / Quality and Speed

質とスピード
初演: 2019/10/31 @ EOF2019

Transcript

1. ࣭ͱεϐʔυ ࿨ా
   ୎ਓ
   !U@XBEB 0DU
   
   
   !
   &0'
2. UXBEB
   U@XBEB
   UXBEB ࿨ా୎ਓ
3. ۀքͰͷཱͪҐஔ
   ಠΓา͖͢Δελϯυ
4. " $ ΑΖ͓͘͠ئ͍͠·͢ "
5. ༩͑ΒΕͨ࣌ؒʹରͯ͠΍Δ΂͖͜ͱ͕ଟ͗͢Δ৔߹ɺ Ͳ͏͢΂͖͔
   ʢ˞ͪͳΈʹਖ਼ղ͸
   Bʣ
   B
   είʔϓΛ࡟Δ
   C
   ΋ͬͱਓΛ૿΍͢
   D
   ϦϦʔε೔ΛԆظ͢Δ
   E
   ඼࣭Λ٘ਜ਼ʹ͢Δ
   ʰΞδϟΠϧαϜϥΠʱ
   Q ߥͿΔ࢛ఱԦ͕͋ΒΘΕͨʂ
6. ඼࣭Λ٘ਜ਼ʹ͢Ε͹εϐʔυ͸ಘΒΕΔʁ w୹ظతʹ͸ಘΒΕΔ
   wதظతʹ͸ٯޮՌʹͳΔ
   w௕ظతʹ͸க໋ইʹͳΔ
7. ͦ΋ͦ΋
   ͜͜Ͱ͍͏
   ʮ඼࣭ʯͱ͸ʁ
8. ඼࣭ͱ͸Կ͔
9. l඼࣭ͱ͸୭͔ʹ ͱͬͯͷՁ஋Ͱ͋Δz 
   (FSBME
   8FJOCFSH
10. Accessibility Adaptability Administrability Analyzability Auditability Availability Calibrability Changeability Compatibility Configurability Exploitability Extensibility Flexibility Functionality Installability Integrability Internationalizability Interoperability Learnability Maintainability Marketability Maturity Modifiability Operability Personalizability Portability Recoverability Reliability Replaceability Reusability Scalability Security Sensitivity Stability Suitability Supportability Testability Traceability Transactionality Understandability Upgradeability Usability ... and lots more!
11. ʮ඼࣭ʯ͸
    ͳʹ΍Β೉ͦ͠͏Ͱɺ ͪΐͬͱාͦ͏ʹݟ͕͑ͪ
12. lʮ඼࣭ʯͬͪΎ͏͔ Β೉͘͠ฉ͑ͯ͜·͏ Μ΍ɻʮ࣭ʯͱݴ͑͹ օΘ͔ͬͯ͘ΕΔɻz ग़యࣦ೦ɻςϨϏ͔ϥδΦͷΠϯλϏϡʔ൪૊ΑΓ
13. ඼࣭
14. ඼࣭
15. lࢲͨͪͷମʹ͸ɺԿ͔ʮྑ ͍΋ͷʯΛݟൈ͘ೳྗ͕ͦ ͳΘ͍ͬͯΔz IUUQTUNUNTIBUFOBCMPHDPNFOUSZ
16. 28"/
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17. XXXJUNFEJBDPKQJNBSUJDMFTOFXTIUNM
18. IUUQTXXXKVTFPSKQEFQBSUNFOUBMQPJOUIUNM ङ໺Ϟσϧ
19. ʢ͓٬༷͔Βʣݟ͑Δ඼࣭ͱݟ͑ͳ͍඼࣭ w֎෦඼࣭ͱ಺෦඼࣭
    wར༻࣌ͷ඼࣭ͱ੡඼඼࣭
    wػೳཁ݅ͱඇػೳཁ݅
20. External Quality: Correctness, Usability, Efficiency, Reliability, Integrity, Adaptability, Accuracy, Robustness Internal Quality: Maintainability, Flexibility, Portability, Re-usability, Readability, Testability, Understandability ֎෦඼࣭ͱ಺෦඼࣭
21. ιϑτ΢ΣΞͷ඼࣭Λ֎෦ࢦඪͰಛ௃͚ͮΔਓ͸ଟ ͍ɻਖ਼͍͜͠ͱΛ͢Δɺόά͕ͳ͍ɺ଎͍ɺͳͲͩɻ ͕ͩɺͦΕΒ͸ΑΓਂ͍ݪҼͷ঱ঢ়ʹ͗͢ͳ͍ɻ
    ຊॻͰઆ໌͢Διϑτ΢ΣΞͷ඼࣭͸಺෦඼࣭Ͱ͋ Δɻ಺෦඼࣭Λ࡞ΓࠐΜͩ݁Ռͱͯ͠ɺ֎෦඼࣭ͱ͠ ͯఆٛ͞ΕΔಛੑͷ࣮ݱʹۙͮ͘͜ͱ͕Ͱ͖Δɻ಺෦ ඼࣭͸݁ՌͰ͸ͳ͘ݪҼͰ͋Γɺྑ͍ιϑτ΢ΣΞ͕ උ͍͑ͯΔ΂͖΋ͷͩɻ
    ʰϨΨγʔίʔυ͔Βͷ୤٫ʱQ
22. Ͱ͸ͲͷΑ͏ͳ
    ɹ಺෦඼࣭Λ
    ٘ਜ਼ʹ๋͛ͨͷ͔
23. อकੑ
    Maintainability
24. Joseph P. Cavano and James A. McCall. A framework for the measurement of software quality. In software quality assurance workshop on Functional and performance issues, pages 133–139, 1978. IUUQTXXXUIPNBTBMTQBVHIPSHQVCGOEJMJUZIUNM $BWBOP
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28. อकੑΛ
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29. ݱ৔͔ΒͷதܧͰ͢
30. ർฐ͖ͬͨ͠ݱ৔
31. IUUQTXXXqJDLSDPNQIPUPTPLJOBXBTPCB ߥΈ͖ͬͨίʔυ
32. ര஄ॲཧͷΑ͏ͳϦϦʔε
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34. IUUQTUXJUUFSDPNHBPHBP@TUBUVT
35. อकੑΛ٘ਜ਼ʹ͢Ε͹εϐʔυ͸ಘΒΕΔʁ w୹ظతʹ͸ಘΒΕΔ
    wதظతʹ͸ٯޮՌʹͳΔ
    w௕ظతʹ͸க໋ইʹͳΔ
36. ੈͷதʹ͸ɺ࣌ؒΛ༏ઌ͢ΔͨΊͳΒ඼࣭Λ٘ਜ਼ʹͰ͖Δͱ ৴͓ͯ͡Δഐ΋͍ΔΑ͏͕ͩɺͦΕ͸ؒҧ͍ͩɻ
    ͨͱ͑ͲΜͳʹ୹ظతʹ։ൃ଎౓Λ޲্ͤͨ͞ͱͯ͠΋ɺ඼ ࣭Λ٘ਜ਼ʹ͢Δ͜ͱͰ੒ཱ͍ͯ͠ΔऔΓ૊ΈͳͷͰ͋Ε͹ɺ ͦΕ͸·΍͔͠Ͱ͔͠ͳ͍ɻҰ࣌తͳࡨ֮ʹऴΘΔͩΖ͏ɻ
    ඼࣭Λམͱ͢͜ͱ͸ɺౙͷפ͕͞ݫ͍͔͠Βͱ͍ͬͯ೩͑͞ ͔Δ౛ͰδϟάϦϯά͢ΔΑ͏ͳ΋ͷͩɻ͔֬ʹ΄ΜͷҰॠ ख͸Թ·Δ͔΋͠ΕΜɻ͕ͩɺ͍ͣΕ੾Γই΍ͻͲ͍ՐইΛ ෛ͏͜ͱʹͳΔͰ͋Ζ͏ɻ
    ʰΞδϟΠϧαϜϥΠʱ
    Q ϚελʔηϯηΠᐌ͘
37. IUUQTNBSUJOGPXMFSDPNBSUJDMFTJTRVBMJUZXPSUIDPTUIUNM อकੑͷ௿͕͞΋ͨΒ͢΋ͷ ͻͱͭͻͱͭͷมߋʹ
    ༨ܭͳ͕͔͔࣌ؒΔ
38. Ͱ͸
    εϐʔυΛམͱͤ͹ อकੑ͸্͕Δʁ
39. IUUQTUXJUUFSDPNESJMMCJUTTUBUVT
40. IUUQTUXJUUFSDPNWPMVOUBTTUBUVT
41. IUUQTPTBIBUFOBCMPHDPNFOUSZ
42. ͭ·Γ
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43. IUUQTUXJUUFSDPNLBU[DIBOHTUBUVT
44. 2VBMJUZ
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45. IUUQTTQFBLFSEFDLDPNTIJNBTIJNBTUBSURVBMJUZSFBMGSFFDBNQBJHO 2VBMJUZ
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46. ࣭ εϐʔυ యܕతͳޡղ നؙ෇͖໼ҹ
    ෛͷ઀ଓ
    
    ࠜݩ͕૿͑Ε͹ઌ͸ݮΔɻࠜݩ͕ݮΕ͹ઌ͸૿͑Δ
47. ܦӦతͳཁٻʹ߹Θͤͯɺ༩͑ΒΕͨ։ൃظ͔ؒΒॊೈʹԚ͞ͱ ଎͞Λબ୒͢Δͱ͍͏Α͏ͳث༻ͳܳ౰͸΄ͱΜͲෆՄೳͩͱ͍ ͑·͢ɻ͜Ε͸ɺۃΊͯجૅతͳͱ͜ΖͰ͋Ε͹ଟগ͸Ͱ͖Δ͔΋ ͠Ε·ͤΜ͕ɺ࣮ࡍʹ͸ɺιʔείʔυ͕Ԛͯ͘஗͍ਓ΋͍Ε ͹ɺ៉ྷͰ଎͍ਓ΋ଟ͍͘·͢ɻ
    ʰΤϯδχΞϦϯά૊৫࿦΁ͷট଴ʱ
    Q ΫΠοΫμʔςΟͷਆ࿩
48. ඼࣭Λ٘ਜ਼ʹ͢Δͷ͸ɺޮՌతͳίϯτϩʔϧํ๏Ͱ͸ͳ ͍ɻ඼࣭͸੍ޚม਺Ͱ͸ͳ͍ɻ
    ௿඼࣭Λड͚ೖΕΔ͜ͱͰɺϓϩδΣΫτ͕଎͘ͳΔ͜ͱ ͸ͳ͍ɻߴ඼࣭Λཁٻ͢Δ͜ͱͰɺϓϩδΣΫτ͕஗͘ͳ Δ͜ͱ΋ͳ͍ɻ
    Ή͠Ζ඼࣭ΛߴΊΔ͜ͱͰɺσϦόϦʔ͕ߴ଎ʹͳΔ͜ͱ ͕ଟ͍ɻ඼࣭ج४ΛԼ͛ͯ͠·͏ͱɺσϦόϦʔ͕஗͘ ͳΓɺ༧ଌͰ͖ͳ͘ͳͬͯ͠·͏ɻ
    ʰΤΫετϦʔϜϓϩάϥϛϯάʱ
    Q
49. ࠷ߴͷ։ൃऀ͕͍ͪ͹Μ͖Ε͍޷͖ͳ։ൃऀͰ͋Δ͜ͱ ʹؾ͍ͮͨͱ͖ɺࢲ͸ͼͬ͘Γͨ͠ɻ଎͍ϓϩάϥϚʔ ͸ࡶͳϓϩάϥϚʔͩͱࢥ͍͔ͬͯͨΒͩɻ
    ͕ͩɺ࣮ࡍ͸ਖ਼൓ରͩͬͨɻࢲ͕ձͬͨதͰ࠷଎ͷϓϩ άϥϚʔ͸ɺίʔυΛѻ͍΍͍͢Α͏ʹอͭ͜ͱʹಛʹ ஫ҙΛ෷͍ͬͯͨɻ
    ʰϨΨγʔίʔυ͔Βͷ୤٫ʱ
    Q
50. ίʔυΛॻ͘଎͞ͱίʔυͷ͖Ε͍͞ʹؔ࿈͕͋Δͱೝ ࣝͨ͋͠ͱͰ΋ɺࢲ͸ͦͷͭͷ͍͋ͩͷҼՌؔ܎Λݟͭ ͚Δͷʹ࣌ؒΛཁͨ͠ɻ
    ίʔυͷ඼࣭Λߴ͘อ͍ͬͯͨʮʹ΋ؔΘΒͣʯ଎͍ͷͰ ͸ͳ͍ɻίʔυͷ඼࣭Λߴ͘อ͍ͬͯͨʮ͔Βͦ͜ʯ଎͍ ͷͩɻ
    ͜ͷ͜ͱΛཧղͨ͠Βɺιϑτ΢ΣΞ։ൃʹର͢Δݟํ͕ มΘͬͨɻ
    ʰϨΨγʔίʔυ͔Βͷ୤٫ʱ
    QQ
51. ࣭ εϐʔυ ίʔυͷ඼࣭Λ٘ਜ਼ʹ͔ͨ͠Β଎͍ͷͰ͸ͳ͘ നؙ෇͖໼ҹ
    ෛͷ઀ଓ
    
    ࠜݩ͕૿͑Ε͹ઌ͸ݮΔɻࠜݩ͕ݮΕ͹ઌ͸૿͑Δ
52. ࣭ εϐʔυ ίʔυͷ඼࣭Λߴ͘อ͍ͬͯͨʮ͔Βͦ͜ʯ଎͍ ໼ҹ
    ਖ਼ͷ઀ଓ
    
    ࠜݩ͕૿͑Ε͹ઌ΋૿͑Δɻࠜݩ͕ݮΕ͹ઌ΋ݮΔ
53. Ͱ͸
    εϐʔυ͔Β࣭΁ ͷӨڹ͸Ͳ͏͔
54. ࣭ εϐʔυ
    Ͱ͸εϐʔυ͔Β࣭΁ͷӨڹ͸Ͳ͏͔
55. ϓϩηε඼࣭Լ͛Δͱखॱϛε౳ʹΑΓख໭Γ͕ൃੜ͠σϦόϦ΁ͷϦʔυ λΠϜ͕௕͘ͳΔ
    ಺෦඼࣭͛͞ΔͱόάͷൃੜɺίʔυϨϏϡʔͷࢦఠɺٕज़తෛ࠴ʹΑΔ࣮ ૷ͷෳࡶ͞ͳͲʹΑΓख໭Γ΍଎౓௿ԼΛট͖ɺσϦόϦ΁ͷϦʔυλΠϜ ͕௕͘ͳΔ
    ֎෦඼࣭͛͞Δͱ69όάΛ͏Έɺຊདྷݕূ͍ͨ͜͠ͱ͕ݕূͰֶ͖ͣͼ· ͰͷϦʔυλΠϜ͕௕͘ͳΔɻো֐ൃੜʹΑΓɺͦΕͷରԠʹऴΘΕϦιʔ ε͕ރׇ͠ຊདྷ΍Δ΂͖͜ͱͷ଍͔ͤʹͳΓɺϦʔυλΠϜ͕௕͘ͳΔ
    ར༻࣌ͷ඼࣭͛͞ΔͱɺΧελϚʔαϙʔτ͕සൃͦ͠ͷରԠʹ૊৫ͷύ ϫʔ͕࣋ͬͯߦ͔ΕϦʔυλΠϜ͕௕͘ͳΔ 2$%ͷτϨʔυΦϑͳΜͯຊ౰͸ແ͔ͬͨΜͩ IUUQJLFZIBUFCMPKQFOUSZ
56. IUUQJLFZIBUFCMPKQFOUSZ εϐʔυΛམͱ͢ͱԾઆݕূϓϩηε͕ճΒͳ͍
57. ඼࣭͸ѱ͍ͱجຊతʹख໭ΓΛੜΉͷͰ଎౓ʹ௓Ͷ ฦΔɻख໭ͬͯΔ࣌ؒ͸ֶͼΛ͏·ͳ͍࣌ؒɻ඼࣭ ΛԼ͛Δͱ͍͏൑அ͸ֶͼͷ଎౓௿ԼΛڐ༰͢Δͱ ͜ͱɻ
    ैདྷͷమ൘ ͩͱޡղ͞Ε͍ͯͨ ͩͬͨ඼࣭ͯͯ͢ ଎౓͋͛Α͏͸
    ඼࣭͸ྼԽ͢Ε͹ख໭Γ͕ൃੜ͢Δ ͚ͩͰɺ݁ہ͸ϦʔυλΠϜͷ૿Ճʹ௓ͶฦΔͷͰ ΍Ί·͠ΐ͏ɻ 2$%ͷτϨʔυΦϑͳΜͯຊ౰͸ແ͔ͬͨΜͩ IUUQJLFZIBUFCMPKQFOUSZ
58. ͭͷΩʔϝτϦΫε wϦʔυλΠϜ
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59. ࣭ εϐʔυ ຊ౰ͷؔ܎ɹ ໼ҹ
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60. ຊ౰ͷؔ܎ɹ w಺෦඼࣭͕εϐʔυΛੜΈ
    wεϐʔυֶ͕ͼͷϧʔϓΛੜΈ
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    w֎෦඼࣭͕ڝ૪ྗΛੜΈ
    wڝ૪ྗ͕ച্ΛੜΈ
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61. ʮ࣭WTεϐʔυʯͱ͍͏֓೦͸ࠜຊతʹؒҧ͍ͬͯΔͱࢥ͏ɻ
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    ٯʹɺ࣭ͷߴ͍ιϑτ΢ΣΞΛॻ͔ͳͯ͘͸ɺͳʹ͔͋Δ౓ʹΠ ϯϑϥ่͕յ͠ɺૉૣ͘։ൃΛ͢Δ͜ͱ͕Ͱ͖ͳ͘ͳͬͯ͠· ͏ɻΠϯϑϥͷ่յ͸ɺ΍ΔؾΛ࡟͙ͷͰಛʹ͕ͨͪѱ͍ɻ IUUQTLOPIKQBOTXFSTEDB
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66. Ͳ͏΍ͬͯݸਓͷ ࣭Λ্͛Δͷ͔
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68. ϑΣΠεϒοΫͰಇ͖ͩͨ͜͠Ζʹ͸طʹͦΕͳΓͷܦݧ͕͋ͬ ͨͷͰɺ΅͕͘σβΠϯͨ͠γεςϜ͸֓Ͷγϯϓϧ͞ͱચ࿅͞ Λஸ౓Α݉͘Ͷඋ͍͑ͯͨͱࢥ͏͠ɺଞͷΤϯδχΞͷσβΠϯ ͷ໰୊఺΋ɺൺֱత͙͢ʹؾͮ͘͜ͱ͕Ͱ͖ͨɻ͜Ε΋࠷ॳͷ਺ ೥ͰഓΘΕͨ൑அྗͷ͓͔͛ͩɻ
    ͜ͷʮ൑அྗʯ͸ɺϓϩάϥϚʔʹͱͬͯඇৗʹॏཁͳͷ͕ͩɺ ͦ͏؆୯ʹڭ͑ΒΕΔ΋ͷͰ΋ͳ͍ɻ΅͕͘஌ΔݶΓɺ൑அྗΛ ͚ͭΔҰ൪ͷํ๏͸ɺࣗ෼Ͱઃܭͨ͠γεςϜΛ௕͍ؒϝϯς͢ Δ͜ͱͩͱࢥ͏ɻ IUUQTLOPIKQBOTXFSTEDB
69. Ұ൪ॏཁͰҰ൪΍͔͍ͬͳεΩϧ͸γεςϜΛઃܭ ͢ΔͨΊͷ൑அྗͩɻ
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    TJNQMFS ͱ͍͏ͷ͸ͳ͔ͳ͔ڭ͑ ΒΕΔ΋ͷͰ͸ͳ͘ɺେํܦݧΛॏͶ֮ͯ͑Δ΋ͷ ͩɻ IUUQTLOPIKQBOTXFSTEDB
70. ଛӹ෼ذ఺͸
    ͍ͭདྷΔͷ͔
71. ςετࣗಈԽͷଛӹ෼ذ఺͸ʮճʯ IUUQTXXXBNB[PODPKQEQ ͓ΑͦճͰखಈςετͱࣗಈԽ͞Εͨ ςετͷίετ͕ٯస͢Δ
72. "
    1IJMPTPQIZ
    PG
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73. once a code base turns to spaghetti, it is nearly impossible to fix. the payoff for good (or bad) design comes pretty quickly, so there's a good chance that the tactical approach won't even speed up your first release. good design eventually pays for itself, and sooner than you might think. IUUQTXXXBNB[PODPKQEQ "
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74. ಺෦඼࣭΁ͷ౤ࢿͷଛӹ෼ذ఺͸
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75. อकੑΛ٘ਜ਼ʹ͢Ε͹εϐʔυ͸ಘΒΕΔʁ w୹ظతʹ͸ಘΒΕΔ
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    w௕ظతʹ͸க໋ইʹͳΔ
76. 
    ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ w ʮ඼࣭ͱεϐʔυ͸τϨʔυΦϑͷؔ܎ʹ͋Δʯ͸େ͖ ͳޡղ
    w ʮ඼࣭ʯͷ໊ͷ΋ͱʹ٘ਜ਼ʹ͞ΕΔͷ͸಺෦඼࣭ͷಛʹ อकੑʢςετ༰қੑɺཧղ༰қੑɺมߋ༰қੑʣ
    w ࣮ࡍʹ͸อकੑΛߴΊΕ͹εϐʔυ͸্͕Δ͠ɺอकੑ Λམͱͤ͹εϐʔυ͸Լ͕Δɻ
    w εϐʔυΛམͱͯ͠΋อकੑ͸্͕Βͳ͍͠ɺϦʔυλ ΠϜ͕௕͘ͳΕ͹Ծઆݕূϓϩηε͕ճΒͳ͍
    w ಺෦඼࣭΁ͷ౤ࢿͷଛӹ෼ذ఺͸ҙ֎ͱૣ͘ ϲ݄Ҏ ಺ ΍ͬͯ͘Δ