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ビジネスとエンジニアリングの接合点 そしてコード品質がそこに及ぼす影響 v1.1 / The Intersections of Business and Engineering, and The Impact of Code Quality There (v1.1)
2024-04-04 Findy コード品質が及ぼすビジネスへの影響
https://findy.connpass.com/event/313471/
mtx2s
April 04, 2024
Transcript
46 slides
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ࣗݾհ দຊʢ·ͭͱ͛͠Ώ͖ʣ!NUYT w ίϯγϡʔϚʔ͚ɺϏδωε͚ιϑτΣΞϓϩμΫτΛ։ൃ͢Δ৫ͷ ΤϯδχΞϦϯάϚωʔδϟʔ w ͯͳϒϩάOPUF 9ʢ5XJUUFSʣͰࡉʑͱൃ৴͍ͯ͠·͢ w IUUQTUXJUUFSDPNNUYT
w IUUQTNUYTIBUFOBCMPHDPN w IUUQTOPUFDPNNUYT w IUUQTTQFBLFSEFDLDPNNUYT -
ਤʹ͢Δͱɺ͜͏ͳΔ ݟੵΓ࡞ ϓϩδΣΫτߦ ܭը ܭըͮ͘Γऴྃ ݟੵΓ Ϗδωε λʔήοτ ܭըͮ͘Γ։࢝ ΤϯδχΞ
Ϧϯά Ϗδωε ϓϩδΣΫτൃݕ౼ ҙࢥܾఆ ϓϩδΣΫτϓϥϯχϯά ϓϩδΣΫτίϯτϩʔϧ ܭըͲ͓Γ 0O5JNFBOE0O#VEHFU XJUIBTBUJTGBDUPSZSFTVMU 5. Ϗδωελʔήοτઃఆ ͕ܽؕଟ͍ ։ൃ͕͍࣌ؒ ݟੵΓ͕͍͠ μϝʔδ μϝʔδ ߹ Ձͷఏڙ μϝʔδ Ձ ߹ Ϗδωελʔήοτ ୡ ڠಇͰͷՁͷ୳ࡧ -
ϓϩδΣΫτɺϏδωε͔ΒΤϯδχΞͷ૬ஊ͔Β࢝·Δ w ԿΒ͔ͷϏδωελʔήοτʹ͚ͯɺ ϓϩδΣΫτൃͷݕ౼Λ࢝ΊΔ ݟੵΓ ܭը ϓϩδΣΫτ Ϗδωελʔήοτ w ϓϩδΣΫτൃͷҙࢥܾఆͷͨΊʹɺ
ܭըͮ͘ΓΛ࢝ΊΔ w ܭըͮ͘ΓͷͨΊʹɺݟੵΓΛ࡞͢Δ Ϗδωε ΤϯδχΞϦϯά -
ݟੵΓΛͱʹܭըΛ࡞ΓɺܭըΛͱʹҙࢥܾఆ͢Δ ܭը w ܭըΛͱʹɺϓϩδΣΫτൃΛҙࢥ ܾఆ͢Δ Ϗδωε ΤϯδχΞϦϯά w ϓϩδΣΫτΛߦ͠ɺϏδωελʔή οτΛୡ͢Δ
w ݟੵΓΛͱʹɺܭըΛ࡞Δ ϓϩδΣΫτ Ϗδωελʔήοτ ҙࢥܾఆ ݟੵΓ -
ʮܭըʯͱɺϏδωεͱΤϯδχΞ྆ํͷҙݟ͕ௐ͞Εͨ݁Ռ ܭը ݟੵΓ Ϗδωε λʔήοτ ΤϯδχΞ Ϧϯά Ϗδωε ௐ εέδϡʔϧʢ·ͨίετɺʣ
ྃ͢Δ֬ Ϗδωεʢࠨʣ ΤϯδχΞϦϯά ʢ্ʣ Ϗδωε୲ ࣌ظΛ ૣΊ͍ͨ ΤϯδχΞ ֬Λ ߴΊ͍ͨ -
྆ऀͷ؍͕ௐɾҙࢥܾఆ͞Εͨʮܭըʯ͕ϏδωεͱΤϯδχΞϦϯάͷ߹Ͱ͋Δ ݟੵΓ࡞ ϓϩδΣΫτߦ ܭը ܭըͮ͘Γऴྃ ݟੵΓ Ϗδωε λʔήοτ ܭըͮ͘Γ։࢝ ΤϯδχΞ
Ϧϯά Ϗδωε ϓϩδΣΫτൃݕ౼ Ϗδωελʔήοτୡ ҙࢥܾఆ Ϗδωελʔήοτઃఆ ߹ -
ϓϩδΣΫτޭͷධՁج४ʮܭըͲ͓Γʯ͚ͩͰͳ͘ʮՁͷఏڙʯؚΉ ൛Ҏ߱ͷ$)"04ϨϙʔτͷධՁج४ɺ͔࣌ؒͭ༧ࢉɺͦΕʹՁͷఏڙ BTBUJTGBDUPSZ SFTVMU 0O5JNF 0O#VEHFU ϓϩδΣΫτ͕ ߹ཧతͳݟੵΓ࣌ؒʹ ղܾ͞ΕΔ͜ͱ ϓϩδΣΫτ͕
߹ཧతͳݟੵΓ༧ࢉʹ ऩ·Δ͜ͱ ॳͷείʔϓʹؔΘΒͣ ސ٬ͱϢʔβʔʹ ຬΛͨΒͨ͠ ʢΞτΧϜʣ ϓϩδΣΫτޭͷධՁج४ ܭըͲ͓Γ Ձͷఏڙ BOE XJUI ࢀߟจݙɿ $)"043&1035c4UBOEJTI(SPVQ IUUQTXXXTUBOEJTIHSPVQDPNTBNQMF@SFTFBSDI@ fi MFT$)"043FQPSU'JOBMQEG -
࣌ؒͱ༧ࢉ͕ʮܭըͲ͓ΓʯͰ͋ΔͨΊʹɺྑ͍ݟੵΓͱྑ͍ܭը͑͋͞Εྑ͍ͷ͔ʁ ݟੵΓ࡞ ϓϩδΣΫτߦ ܭըͮ͘Γऴྃ ܭըͮ͘Γ։࢝ ϓϩδΣΫτൃݕ౼ Ϗδωελʔήοτୡ ҙࢥܾఆ ϓϩδΣΫτϓϥϯχϯά ܭըͲ͓Γ
0O5JNFBOE0O#VEHFU Ϗδωελʔήοτઃఆ ʁ -
ϓϩδΣΫτͷߦதɺ֎͔Βͷ༷ʑͳࠔΛΓӽ͑ͳ͚ΕͳΒͳ͍ ϓϩδΣΫτ ࠔ ॻ੶ʰιϑτΣΞݟੵΓʱͷʮୈষݟੵΓͱʯͷਤΛࢀߟʹ࡞c4UFWF.D$POOFMMஶ ܭըͲ͓Γ ܭը ࠔ ࠔ ࠔ ࠔ
ࠔ ࠔ ࠔ 0O5JNFBOE0O#VEHFU ϓϩδΣΫτίϯτϩʔϧ తཁҼ ֎తཁҼ -
ϓϩδΣΫτϓϥϯχϯά͚ͩͰͳ͘ɺϓϩδΣΫτίϯτϩʔϧඞཁ ݟੵΓ࡞ ϓϩδΣΫτߦ ܭըͮ͘Γऴྃ ܭըͮ͘Γ։࢝ ϓϩδΣΫτൃݕ౼ Ϗδωελʔήοτୡ ҙࢥܾఆ ϓϩδΣΫτϓϥϯχϯά ϓϩδΣΫτίϯτϩʔϧ
ܭըͲ͓Γ 0O5JNFBOE0O#VEHFU Ϗδωελʔήοτઃఆ -
ʮՁͷఏڙʯͷͨΊʹɺ࣮ݧʹΑΔݕূΛૉૣ͘ճ͢͜ͱ͕ඞཁ ৫͕ଟֹͷඅ༻Λ͔͚ͯϓϩμΫτʹػೳཁٻΛ࣮ͨ͠ͱͯ͠ɺձ͕ࣾՁͩͱߟ͍͑ͯΔ ͷʹސ٬͕ڞײ͠ͳ͍͜ͱ͋ΔɻՁ͕͋Δͱ৴͍ͯͯ͡ɺސ٬ʹΑͬͯݕূ͞ΕΔ·Ͱ୯ͳΔ Ծઆʹա͗ͳ͍ɻ͜͜ͰɺԾઆͱ࣮ݧཱ͕ͭɻ ᶸ ᶹ ΤϏσϯεϕʔευϚωδϝϯτΨΠυc4DSVNPSH IUUQTTDSVNPSHXFCTJUFQSPETBNB[POBXTDPNESVQBM&#.(VJEF+BQBOFTFQEG ࢢʹग़͢·Ͱͷ࣌ؒʢ5.ʣΛݟΔཧ༝ɺ৫͕ՁΛఏڙ͢ΔͨΊʹ͔͔Δ࣌ؒΛ࠷খԽ͢Δ͜ ͱͰ͋Δɻʢதུʣ৫͕5.ΛܧଓతʹධՁ͢ΔͨΊʹඞཁͳ࣭ΛҎԼʹڍ͛Δɻ
৫৽͍࣮͠ݧͱใ͔ΒͲΕֶ͚ͩ͘Ϳ͜ͱ͕Ͱ͖Δ͔ʁ ใΛͱʹͲΕ͚ͩ͘దԠͰ͖Δ͔ʁ ৽͍͠ΞΠσΞΛސ٬ʹͲΕ͚ͩ͘ςετͰ͖Δ͔ʁ ᶸ ᶹ 5JNFUP.BSLFU ૉૣ͘ճ͢ ࣮ݧͱܭଌ ݕࠪ దԠ Ծઆ ΤϏσϯεϕʔευϚωδϝϯτΨΠυc4DSVNPSH IUUQTTDSVNPSHXFCTJUFQSPETBNB[POBXTDPNESVQBM&#.(VJEF+BQBOFTFQEG -
࣮ݧʹΑΔՁͷ୳ࡧϏδωεͱΤϯδχΞͷڠಇͰ͋Γɺͦͷ݁ՌͨΔʮՁʯ߹Ͱ͋Δ ݟੵΓ࡞ ϓϩδΣΫτߦ ܭըͮ͘Γऴྃ ܭըͮ͘Γ։࢝ ϓϩδΣΫτൃݕ౼ ҙࢥܾఆ XJUIBTBUJTGBDUPSZSFTVMU 5. Ϗδωελʔήοτઃఆ
Ձͷఏڙ Ձ Ϗδωελʔήοτ ୡ ڠಇͰͷՁͷ୳ࡧ ߹ -
͜͜·Ͱͷ·ͱΊ w ϓϩδΣΫτޭͷධՁج४ w ࣌ؒͱ༧ࢉ͕ܭըͲ͓ΓͰ͋Δ͜ͱ w ॳͷείʔϓʹؔΘΒͣސ٬ϢʔβʔʹՁΛఏڙ͢Δ͜ͱ w ϓϩδΣΫτޭʹٻΊΒΕΔཁૉ w
ଥੑͷ͋ΔϓϩδΣΫτϓϥϯχϯά w ޮՌతͳϓϩδΣΫτίϯτϩʔϧ w ࢢೖ·Ͱͷ࣌ؒʢ5.ʣͷॖ -
͜͜·Ͱͷ·ͱΊ ݟੵΓ࡞ ϓϩδΣΫτߦ ܭը ܭըͮ͘Γऴྃ ݟੵΓ Ϗδωε λʔήοτ ܭըͮ͘Γ։࢝ ΤϯδχΞ
Ϧϯά Ϗδωε ϓϩδΣΫτൃݕ౼ ҙࢥܾఆ ϓϩδΣΫτϓϥϯχϯά ϓϩδΣΫτίϯτϩʔϧ ܭըͲ͓Γ 0O5JNFBOE0O#VEHFU XJUIBTBUJTGBDUPSZSFTVMU 5. Ϗδωελʔήοτઃఆ ߹ Ձͷఏڙ Ձ Ϗδωελʔήοτ ୡ ڠಇͰͷՁͷ୳ࡧ ߹ -
ίʔυ࣭ɺʮܭըͲ͓ΓʯͱʮՁͷఏڙʯͷ྆ํʹӨڹ͢Δ ݟੵΓ࡞ ϓϩδΣΫτߦ ܭը ܭըͮ͘Γऴྃ ݟੵΓ Ϗδωε λʔήοτ ܭըͮ͘Γ։࢝ ΤϯδχΞ
Ϧϯά Ϗδωε ϓϩδΣΫτൃݕ౼ ҙࢥܾఆ ϓϩδΣΫτϓϥϯχϯά ϓϩδΣΫτίϯτϩʔϧ ܭըͲ͓Γ 0O5JNFBOE0O#VEHFU XJUIBTBUJTGBDUPSZSFTVMU 5. Ϗδωελʔήοτઃఆ ߹ Ձͷఏڙ Ձ ߹ Ϗδωελʔήοτ ୡ ڠಇͰͷՁͷ୳ࡧ ίʔυ࣭ Өڹ -
ϓϩδΣΫτޭʹର͢Δ્ཁҼͱͳΔ w ߴ࣭ͳίʔυʹൺɺ࣭ͳίʔυʜʜ w ϓϩδΣΫτޭʹٻΊΒΕΔཁૉ w ଥੑͷ͋ΔϓϩδΣΫτϓϥϯχϯά w ࢢೖ·Ͱͷ࣌ؒʢ5.ʣͷॖ w
ޮՌతͳϓϩδΣΫτίϯτϩʔϧ ༧ଌͮ͠Β͍ ͕͔͔࣌ؒΔ ରԠʹΘΕΔ 32d32ɺԼهࢀߟจݙʮ3&46-54ʯʹ͓͚Δه߸ʹରԠ $PEF3FE5IF#VTJOFTT*NQBDUPG$PEF2VBMJUZr"2VBOUJUBUJWF4UVEZPG1SPQSJFUBSZ1SPEVDUJPO$PEFCBTFTc"EBN5PSOIJMM .BSLVT#PSH IUUQTBSYJWPSHBCT ͕ܽؕଟ͍ʢ32ʣ ݟੵΓ͕͍͠ʢ32ʣ ։ൃ͕͍࣌ؒʢ32ʣ -
։ൃ࣌ؒͷݟੵΓ͕͘͠༧ଌՄೳੑ͕͍ͨΊɺܭըͷଥੑ͕ࣦΘΕΔ εέδϡʔϧʢ·ͨʣ ྃ͢Δ֬ ൣғΑΓ͘ ߴ࣭ ࣭ ʢ༧ଌՄೳੑ͕͍ʣ
ͨͱ͑ɺྃΛ͔Βͷ֬Ͱग़͢ͱ͢Δ ࣭ͳίʔυ͕ଟ͍ϓϩδΣΫτɺߴ࣭ʹൺ༧ଌͷൣғ͕͘ͳΔ ܭըͷଥੑ͕Լ͕Δ -
͕ܽؕଟ͍ͱɺܽؕमਖ਼ຊ൪τϥϒϧͷରԠʹΘΕɺܭըԆΛҾ͖ى͜͢ ௨ৗ ܽؕͷଟ͍ ϓϩδΣΫτ ઃܭͱ࣮ ςετ ܽؕमਖ਼ Ԇ ։ൃ։࢝ ࢢೖ༧ఆ
ઃܭͱ࣮ ςετ ܽؕमਖ਼ ܽؕͷଟ͍ ϓϩδΣΫτ ʢ࣮ଶʣ ઃܭͱ࣮ ςετ ܽؕमਖ਼ ։ൃதʹׂΓࠐΉຊ൪τϥϒϧͷରԠ ։ൃ։࢝ ࢢೖ༧ఆ ͞Βʹ Ԇ Ҏલͷࢢೖ࣌ʹ ݟಀ͕ͨܽؕ͠ τϥϒϧΛى͜͢ ܭըͱͷဃ ܭըͱͷဃ -
։ൃ͕͍࣌ؒͱɺ༧ఆ·Ͱʹظ͢ΔϨϕϧͷՁʹ౸ୡͰ͖ͳ͍ ࣌ؒ ։࢝ ϓϩμΫτͷՁ ظ͢ΔՁ ྃ༧ఆ ճΊ ճΊ ճΊ ճΊ
ճΊ ճΊ ճΊ ճΊ ظ͢ΔՁ ͱͷΪϟοϓ ͍ ͍ ΞΠσΞͷͷՁ͕ͳ͍ɺ͋Δ͍ٯʹՁΛଛͳΘͤΔ 0OMJOF&YQFSJNFOUBUJPOBU.JDSPTPGUc3POOZ,PIBWJ 5IPNBT$SPPLଞ IUUQTBJTUBOGPSEFEVdSPOOZL&Y15IJOL8FFL1VCMJDQEG ࣮ݧʢࢢೖސ٬ͷϨϏϡʔͳͲʣ͝ͱͷϓϩμΫτͷՁͷมಈΠϝʔδ ظ͢ΔՁʹ౸ୡ͢ΔͨΊʹɺԿ࣮ݧΛ܁Γฦ͢ඞཁ͕͋Δ ࣮ݧճͷϓϩδΣΫτ ࣮ݧճͷϓϩδΣΫτ -
ͭͷӨڹΛਤʹ͢Δͱɺ͜͏ͳΔ ݟੵΓ࡞ ϓϩδΣΫτߦ ܭը ܭըͮ͘Γऴྃ ݟੵΓ Ϗδωε λʔήοτ ܭըͮ͘Γ։࢝ ΤϯδχΞ
Ϧϯά Ϗδωε ϓϩδΣΫτൃݕ౼ ҙࢥܾఆ ϓϩδΣΫτϓϥϯχϯά ϓϩδΣΫτίϯτϩʔϧ ܭըͲ͓Γ 0O5JNFBOE0O#VEHFU XJUIBTBUJTGBDUPSZSFTVMU 5. Ϗδωελʔήοτઃఆ ͕ܽؕଟ͍ ։ൃ͕͍࣌ؒ ݟੵΓ͕͍͠ μϝʔδ μϝʔδ ߹ Ձͷఏڙ μϝʔδ Ձ ߹ Ϗδωελʔήοτ ୡ ڠಇͰͷՁͷ୳ࡧ -
·ͱΊΔͱ w ߴ࣭ͳίʔυʹൺɺ࣭ͳίʔυʜʜ w ϓϩδΣΫτޭʹٻΊΒΕΔཁૉ w ଥੑͷ͋ΔϓϩδΣΫτϓϥϯχϯά w ࢢೖ·Ͱͷ࣌ؒʢ5.ʣͷॖ w
ޮՌతͳϓϩδΣΫτίϯτϩʔϧ ༧ଌͮ͠Β͍ ͕͔͔࣌ؒΔ ରԠʹΘΕΔ ʮܭըͲ͓Γʯʹɺظ͢ΔϨϕϧͷʮՁͷఏڙʯ͕ਐ·ͳ͍ 0O5JNF BOE0O#VEHFU XJUIBTBUJTGBDUPSZSFTVMU 32d32ɺԼهࢀߟจݙʮ3&46-54ʯʹ͓͚Δه߸ʹରԠ $PEF3FE5IF#VTJOFTT*NQBDUPG$PEF2VBMJUZr"2VBOUJUBUJWF4UVEZPG1SPQSJFUBSZ1SPEVDUJPO$PEFCBTFTc"EBN5PSOIJMM .BSLVT#PSH IUUQTBSYJWPSHBCT ͕ܽؕଟ͍ʢ32ʣ ݟੵΓ͕͍͠ʢ32ʣ ։ൃ͕͍࣌ؒʢ32ʣ -
ՁΛఏڙ͢Δ·Ͱͷ࣌ؒͷΕɺϏδωεʹѱӨڹΛ༩͑Δ ྫ͑ɺ͔݄͋ͨΓສԁͷརӹΛੜΉػೳͰ͋Εɺ ͔݄ΕͨͳΒɺສԁͷԆίετʹͳΔ ྦྷੵԆίετ $PTUPG%FMBZ Ԇظؒ ͔݄ ສԁ Ԇίετ ϏδωεʹѱӨڹ
ࢢͷ ՁఏڙͷΕ ʮܭըͲ͓Γʯʹɺظ͢ΔϨϕϧͷʮՁͷఏڙʯ͕ਐ·ͳ͚Εʜʜ 0O5JNF BOE0O#VEHFU XJUIBTBUJTGBDUPSZSFTVMU -
Ձ ͭͷ߹ΛڬΜͰɺϏδωεͱΤϯδχΞ͕ରཱΛ࢝ΊΔ ܭը ݟੵΓ Ϗδωε λʔήοτ ΤϯδχΞ Ϧϯά Ϗδωε ରཱʹΑΔۓுؔ
Ϗδωε୲ ࣌ظΛ ૣΊ͍ͨ ΤϯδχΞ ֬Λ ߴΊ͍ͨ ͕ܽؕଟ͍ ݟੵΓ͕͍͠ ։ൃ͕͍࣌ؒ ݟੵΓʹ࣌ؒΛ͔͚Δ େ͖ͳݟੵΓόοϑΝΛऔΔ 5.͕ΑΓѱԽ ৴པ่͕ؔΕΔ ԿͰͦΜͳʹ ͕͔͔࣌ؒΔʁʂ ෆຬ Өڹൣғͷ ߟྀ࿙Ε ϓϨογϟʔ ͬͱ ͬͱ ߹ ߹ -
վળ͕ਐ·ͳ͍͜ͱʹ͍ͭͯɺϏδωε୲Ͳ͏ࢥ͍ͬͯΔͷ͔ʁ Ϗδωε୲ ΤϯδχΞ w վળఏҊʁ۪ஒฉ͍ͨ͜ͱ͋Δ͚Ͳʁ w ΛཧղͰ͖ͳ͍ w ຊʹͰ͖Δͷʁ্ख͍͘͘ͷʁ w
ٕज़՝ͷղܾʹฉ͑͜Δ w ࠓظͷඪͲ͏͢Δͷʁ w ͜ΕͰҙࢥܾఆͰ͖ͳ͍ վળ͕ਐΊΒΕͳ͍ʜʜ -
վળ͕ਐ·ͳ͍Α͋͘Δཧ༝ w ਖ਼ࣜʹվળఏҊ͍ͯ͠ͳ͍ w ٕज़ࢹͰ͔͍ͯ͠͠ͳ͍ w ใͷඇରশੑΛߟྀ͍ͯ͠ͳ͍ w Ϗδωεඪͷߟྀ͕͚͍ܽͯΔ w
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