なぜソフトウェアエンジニアがウェブサービスのインフラ担当になったのか / why-software-engineer-become-infra-engineer

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∁ੴྒ / GMO Pepabo, Inc. 2018.01.19 ߳઒େֶ ಛผߨٛ ͳͥιϑτ΢ΣΞΤϯδχΞ͕ ΢ΣϒαʔϏεͷ Πϯϑϥ୲౰ʹͳͬͨͷ͔

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໨࣍ ࣗݾ঺հɾॴଐձࣾ঺հ ΢ΣϒαʔϏεͷΠϯϑϥͬͯԿͩΖ͏ 43& 4JUF3FMJBCJMJUZ&OHJOFFS తͳ͓࢓ࣄ 43&ɺΠϯϑϥ୲౰ͱͯ͠ಇָ͘͠͞

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ϓϦϯγύϧΤϯδχΞ ∁ੴྒ @r_takaishi ٕज़෦ ٕज़ج൫νʔϜ IUUQTSFQMJOGP

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s06t242

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͜Μʹͪ͸ w߳઒ݝग़਎ w߳઒େֶ޻ֶ෦৴པੑ৘ใγεςϜ޻ֶՊଔۀ w߳઒େֶେֶӃ޻ֶݚڀՊ৴པੑ৘ใγεςϜ޻ֶ ઐ߈मྃ

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͜Μʹͪ͸ w౦ژͰιϑτ΢ΣΞΤϯδχΞΛ೥΄Ͳ wݸਓ޲͚΢ΣϒαʔϏεͷج൫୲౰શࣾతͳαʔ Ϗεج൫

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ΠϯλʔωοτͰՄೳੑ Λͭͳ͛ΔɺͻΖ͛Δ

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1. ΢ΣϒαʔϏεͷ ΠϯϑϥͬͯԿͩΖ͏

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ͳͥιϑτ΢ΣΞΤϯδχΞ͕ ΢ΣϒαʔϏεͷ Πϯϑϥ୲౰ʹͳͬͨͷ͔

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৘ใ͕ଟ͍ wιϑτ΢ΣΞΤϯδχΞ w΢ΣϒαʔϏε wΠϯϑϥ୲౰

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ιϑτ΢ΣΞΤϯδχΞ w໌֬ͳఆٛ͸ͳ͍ wιϑτ΢ΣΞʹؔ͢Δઐ໳஌ࣝɾٕज़Λ࣋ͬͨਓ wઃܭ΍࣮૷ɺӡ༻ɺαϙʔτɺFUDʜ

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΢ΣϒαʔϏε w΢Σϒɿ8PSME8JEF8FC 888 ɻΠϯλʔωοτ ্Ͱ)551Λ༻͍ͯ৘ใΛӾཡͨ͠Γ΍ΓͱΓͨ͠Γ wαʔϏεɿܦࡁ༻ޠʹ͓͍ͯɺചങͨ͠ޙʹϞϊ͕࢒ Βͣɺޮ༻΍ຬ଍ͳͲΛఏڙ͢Δɺܗͷͳ͍ࡒͷ͜ͱ ˞ ˞IUUQTKBXJLJQFEJBPSHXJLJαʔϏε

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΢ΣϒαʔϏε w͜͜Ͱ͸΢Σϒϒϥ΢β΍ϞόΠϧΞϓϦ͔Β)551 ܦ༝Ͱར༻Ͱ͖ΔαʔϏεͱఆٛ wΈͳ͞Μ΋ɺ͍Ζ͍Ζͳ΢ΣϒαʔϏεΛ࢖͍ͬͯΔ ͸ͣ

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Πϯϑϥ୲౰ wओʹΠϯϑϥΛݟΔਓ wΠϯϑϥɿԼ෦૊৫ɺج൫ w஫໨͢ΔॴʹΑͬͯΠϯϑϥ͸มΘΔ w΢ΣϒαʔϏεͷ৔߹ɺओͱͳΔιϑτ΢ΣΞ͕ಈ͘ ৔ॴΑΓԼΛࢦ͢͜ͱ͕ଟ͍ͱࢥ͏

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࿩͸໭ͬͯɺ ΢ΣϒαʔϏεͷͭ͘Γʹ͍ͭͯ

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ඇৗʹγϯϓϧͳ΢ΣϒαʔϏεͷߏ੒ ΢ΣϒαʔϏε ΞϓϦέʔγϣϯ σʔλετΞ

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3VCZPO3BJMTͷྫ ΢ΣϒαʔϏε

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γϯϓϧ͡ΌΜ

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ͳͥΠϯϑϥ୲౰͕ඞཁͳͷ͔ʁ

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γεςϜ͸੒௕ʹ൐͍ෳࡶԽ͢Δ

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minneͷ৔߹ wݸผͷ໾ׂ ϩʔϧ Λ࣋ͭαʔόʔ͕छྨҎ্ଘࡏ w୆Ҏ্ͷαʔόʔ͕Քಇ͍ͯ͠Δϩʔϧ΋ w͜ΕΒ͕͓ޓ͍ʹ࿈ܞͯ͠αʔϏεΛҡ࣋͢Δ w͞Βʹɺࣗ෼ͨͪͰαʔόʔΛཱͯΔ͚ͩͰ͸ͳ͘Ϋ ϥ΢υ΋ར༻ʢϋΠϒϦουΫϥ΢υ

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γεςϜ͸੒௕͢ΔʹैͬͯෳࡶԽ͢Δ w૿Ճ͢ΔΞΫηε΁ͷରԠ w৽ػೳʹΑΔίϯϙʔωϯτͷ௥Ճ wޮ཰ͷΑ͍ػೳ௥Ճɾमਖ਼ͷ࣮ݱ

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૿Ճ͢ΔΞΫηε΁ͷରԠ w࠷ॳʹ༻ҙͨ͠αʔόʔͰ͸ෛՙʹ଱͑ΒΕͳ͘ͳΔ wํ๏αʔόʔΛม͑ͯॲཧೳྗͷ޲্ wํ๏ಉϩʔϧͷαʔόʔΛෳ਺༻ҙɺॲཧΛ෼ࢄ

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৽ػೳʹΑΔίϯϙʔωϯτͷ௥Ճ wઐ༻ͷαʔόʔΛ༻ҙ͢Δɺ΋͘͠͸Ϋϥ΢υΛ࢖͏ wϨεϙϯεߴ଎ԽͷͨΊͷΩϟογϡ wϢʔβʔମݧ޲্ͷͨΊͷશจݕࡧΤϯδϯ wը૾ͳͲͷϑΝΠϧΛอଘ͢ΔͨΊͷετϨʔδ

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ޮ཰ͷΑ͍ػೳ௥Ճɾमਖ਼ͷ࣮ݱ w୆Ҏ্ͷαʔόʔʹίʔυΛޮ཰Α͘഑Δʹ͸ʁ w୆Ҏ্ͷαʔόʔͷઃఆมߋΛޮ཰Α͘΍Δʹ͸ʁ wΞϓϦέʔγϣϯͷςετΛ୹࣌ؒʹ࣮ࢪ͢Δʹ͸ʁ

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໾ׂ෼͚ͳ͍ͱΊͪΌͪ͘Όେม

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ΧΦεΛආ͚Δ wઐ೚ͷ୲౰Λઃ͚Δ͜ͱͰΞϓϦέʔγϣϯΤϯδχ Ξ͸Ϗδωεʹؔ܎͢ΔίʔυʹूதͰ͖Δ wਓʹΑͬͯ΍Γ͍ͨ͜ͱ΍ಘҙͳ͜ͱ͸ҧ͏

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ΠϯϑϥΤϯδχΞ͔ΒSRE΁ wʮΠϯϑϥΤϯδχΞʯͱ͍͏ݴ༿͸͔ͳΓᐆດ wࢹ఺ʹΑͬͯมΘΔ w*5ۀքɺͱಉ͡ wۙ೥޿·͍ͬͯΔͷ͕ʮ4JUF3FMJBCJMJUZ&OHJOFFSʯ

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SRE: Site Reliability Engineer w(PPHMFൃ঵ wӡ༻ۀ຿Λιϑτ΢ΣΞͰղܾ͠ɺαʔϏεͷ৴པੑ Λҡ࣋͢Δ

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৴པੑʁ wΞΠςϜ͕༩͑ΒΕͨ৚݅ͷԼͰɺ༩͑ΒΕͨظؒɺ ཁٻػೳΛ਱ߦͰ͖Δೳྗ w+*4;ʰ৴པੑ༻ޠ (MPTTBSZPG5FSNT 6TFEJO3FMJBCMJUZ ʱ

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΢ΣϒαʔϏεʹ͋ͯ͸ΊͯΈΔ ྫ ΞΠςϜ ΢ΣϒαʔϏε ༩͑ΒΕͨ৚݅ ෼͋ͨΓͷΞΫηε਺͕ສ نఆͷظؒ ೔ ཁٻ͞ΕΔػೳ αʔϏε͕མͪͣʹར༻Ͱ͖Δ͜ͱ ҰఆͷύϑΥʔϚϯεͰར༻Ͱ͖Δ͜ͱ

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΢ΣϒαʔϏε͕1෼ؒʹ5ສΞΫη ε͋Δ৚݅ͷԼͰɺ1೔ͷؒɺམͪͣ ʹɺ·ͨҰఆͷύϑΥʔϚϯεͰར༻ Ͱ͖Δ͜ͱ

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ͳΜͱͳ͘Θ͔͖ͬͯͨ

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αʔϏε͕ʮམͪͳ͍ʯͱ͸ʁ

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αʔϏε͕མͪΔͱ͸ʢਏ͍ʣ wΞΫηεͯ͠΋શ͘ܨ͕Βͳ͍ wܨ͕Δ͕ɺΤϥʔ͕දࣔ͞ΕΔ

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ͳͥαʔϏε͸མͪΔͷ͔ʁ wେྔͷΞΫηεʹΑͬͯ3BJMT΍%#͕ॲཧ͖͠Εͳ͘ ͳΔ wಈ࡞͍ͯ͠Δαʔόʔͷੑೳʹ΋ґଘ͢Δ wίʔυͷόάʹΑͬͯΫϥογϡ͢Δ

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αʔϏε͕མͪͳ͍Α͏ʹ͍ͨ͠ʂ

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ͱ͸͍͑ wαʔόʔ୆਺͕୆ʙͷ࣌୅ wશαʔόʔ͕શ͘མͪͳ͍Α͏ʹ͢Δͷ͸ࠔ೉

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࣮ݱ͍ͨ͜͠ͱ͸Կ͔ʁ w❌αʔϏεͰ࢖͍ͬͯΔαʔόʔ͕མͪͳ͍͜ͱ w⭕αʔϏε͕མͪͳ͍͜ͱ

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αʔόʔ͕1୆མͪͯ΋ɺ ʮαʔϏε͸མͪͳ͍ʯ࢓૊Έ࡞Γ

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αʔϏε͕མͪͳ͍࢓૊Έͮ͘Γͷྫ -PBE#BMBODFS "QQMJDBUJPO "QQMJDBUJPO "QQMJDBUJPO "QQMJDBUJPO ɾɾɾ 0, 0, 0, 0, ͜ͷαʔϏε͓΋͠Ζ͍ʙ ͲͷΞϓϦέʔγϣϯ͕ϦΫΤετΛ ॲཧͯ͠΋ਖ਼ৗʹϨεϙϯεΛฦ͢

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αʔϏε͕མͪͳ͍࢓૊Έͮ͘Γͷྫ -PBE#BMBODFS "QQMJDBUJPO "QQMJDBUJPO "QQMJDBUJPO "QQMJDBUJPO ɾɾɾ 0, 0, 0, /( ୆͓͔͘͠ͳͬͨ৔߹ɺ ΤϥʔʹͳΔՄೳੑ͕ൃੜ͢Δ ͋ΕͬʂʁΤϥʔʹͳͬͨͧʜ  ͓΋͠Ζ͍͚Ͳ࣌ʑ࢖͑ͳ͘ͳΔΑ ͳʜ

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αʔϏε͕མͪͳ͍࢓૊Έͮ͘Γͷྫ -PBE#BMBODFS "QQMJDBUJPO "QQMJDBUJPO "QQMJDBUJPO "QQMJDBUJPO ɾɾɾ 0, 0, 0, /( ͜ͷαʔϏε͓΋͠Ζ͍͠ ͍ͭ΋շదͩͳʙ ͓͔͘͠ͳͬͨαʔόʔʹϦΫΤετ ͕ྲྀΕͳ͍Α͏ʹ੾Γ཭͢

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SREͷϛογϣϯ w৴པੑΛҡ࣋ɾ޲্ͤ͞ΔͨΊʹͰ͖Δ͜ͱΛߟ͑Δ wͲ͏͍͏બ୒ࢶ͕ͱΕΔͷ͔ϦετΞοϓ͢Δ w࠷΋Α͍ํ๏ΛܾΊͯɺ࣮ߦ͢Δ

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·ͱΊ w΢ΣϒαʔϏεͷΠϯϑϥͱ͸ɺίΞͱͳΔΞϓϦέʔ γϣϯ͕ಈ͘৔Λࢦ͢ wαʔϏεͷ੒௕ʹͱ΋ͳ͍ෳࡶͱͳΔͨΊઐ໳஌ࣝɾ ٕज़͕ඞཁ wαʔϏεͷ৴པੑΛҡ࣋͢Δ43&ͷొ৔

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2. Site Reliability Engineer తͳ͓࢓ࣄͬͯʁ

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৴པੑΛҡ࣋͢Δɺͱ͍ͬͯ΋۩ମత ʹͲ͏͍͏͜ͱΛීஈ͍ͯ͠Δͷ͔ʁ

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SRE͕ԿΛ͍ͯ͠Δͷ͔ wछྨͷΤϯδχΞϦϯά wਪଌ͢ΔͳɺଌఆͤΑ wճ΍ͬͨΒࣗಈԽ͠Ζ

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2छྨͷΤϯδχΞϦϯά

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2छྨͷΤϯδχΞϦϯά w43&ͷॏཁͳ࢓ࣄ͸ΤϯδχΞϦϯάΛߦ͏͜ͱ wΤϯδχΞϦϯάʹ΋छྨ͕͋Δ wιϑτ΢ΣΞΤϯδχΞϦϯά wγεςϜΤϯδχΞϦϯά

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ιϑτ΢ΣΞΤϯδχΞϦϯά wίʔυΛॻ͍ͨΓमਖ਼͢Δ͜ͱ wઃܭ΍υΩϡϝϯτ࡞੒΋ wྫɿࣗಈԽͷͨΊͷεΫϦϓτ΍πʔϧ࡞੒ɺ৴པੑ ޲্ͷͨΊͷػೳ௥ՃͳͲ

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ιϑτ΢ΣΞΤϯδχΞϦϯάͷྫ

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ιϑτ΢ΣΞΤϯδχΞϦϯάͷྫ

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ιϑτ΢ΣΞΤϯδχΞϦϯάͷྫ

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γεςϜΤϯδχΞϦϯά wγεςϜͷઃఆมߋɺυΩϡϝϯτ࡞੒ w̍ճ࣮ࢪ͢Δ͜ͱͰӬଓతʹվળ͕ଓ͘΋ͷ wྫɿ-JOVYαʔόʔ΍)551αʔόʔͷઃఆมߋ

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*OGSBTUSVDUVSFBT$PEF͸ɺιϑτ΢ΣΞ ։ൃͷϓϥΫςΟεΛΠϯϑϥͷΦʔτϝʔ γϣϯʹ׆͔͢Ξϓϩʔνͩɻ ,JFG.PSSJT *OGSBTUSVDUVSFBT$PEFQ

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ιϑτ΢ΣΞ։ൃͷϓϥΫςΟεྫ wόʔδϣϯ؅ཧ wςετ

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όʔδϣϯ؅ཧͬͯԿΛ؅ཧ͢Δͷ͔ʁ wαʔόʔͷઃఆ΍Ϋϥ΢υ্ͷϦιʔεΛίʔυԽ wίʔυԽ͢Δ͜ͱͰ࠶ݱੑ͕ੜ·ΕΔ wಉ͡໾ׂͷαʔόʔΛԿඦ୆ͱ࡞Δ͜ͱ͕༰қʹͳΔ wڍಈෆ৹ʹͳͬͨΒɺͦͷ࣌఺ͷόʔδϣϯΛݟΔ

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ίʔυΛॻ͘ͷͰ13 ϓϧϦΫΤετ Ͱ؅ཧ

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υΩϡϝϯτ΋13Ͱ

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ςετ wαʔόʔͷઃఆ͕ͪΌΜͱߦΘΕ͍ͯΔ͔Ͳ͏͔ wαʔόʔͷઃఆʹؔ܎͢ΔϩδοΫͷςετ wΠϯϑϥपΓͷίʔυ͸௕ظؒมߋ͕ͳ͍৔߹͕͋Δ ͷͰɺςετΛॻ͘͜ͱ͕ॏཁ

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Ϋϥ΢υԽʹΑͬͯίʔυԽɾςετ ͕ߦ͍΍͘͢ͳ͖ͬͯͨ

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Ϋϥ΢υԽ

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మͷ࣌୅ wΦϯϓϨϛεʢPOQSFNJTTʣ wαʔόʔ΍ωοτϫʔΫػثΛར༻ऀͷ෺݅΍%$ʹઃஔɾӡ༻͢Δ wϋʔυ΢ΣΞͷ੍໿͕௚઀Өڹ͢Δ wมߋ͕ࠔ೉

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ͦ΋ͦ΋Ϋϥ΢υͱ͸ʁ wΦϯσϚϯυɾηϧϑαʔϏε wωοτϫʔΫܦ༝ͷΞΫηε wϦιʔεͷڞ༻ wߴ଎ͳ֦ுੑ wܭଌՄೳੑ /*45ʹΑΔΫϥ΢υίϯϐϡʔςΟϯάͷఆٛɺIUUQTXXXJQBHPKQpMFTQEG

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Ϋϥ΢υɺΊͪΌศར

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Ϋϥ΢υ͕͋Ε͹ ࠷ߴͷαʔϏεج൫ͱͳΔͷ͔ʁ

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࣮͸ͦ͏Ͱ΋ͳ͍ wΫϥ΢υ͸Ըܙ͚ͩͰ͸ͳ͘ɺ৽ͨͳ՝୊΋΋ͨΒͨ͠ wαʔόʔεϓϩʔϧ wߏ੒υϦϑτ wεϊʔϑϨʔΫαʔόʔ wγεςϜർ࿑

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αʔόʔεϓϩʔϧ wαʔόʔͷௐୡίετ͕ܶతʹԼ͕Δ wαʔόʔͷແடংͳ૿Ճ wεϓϩʔϧݱ৅ɿ౎ࢢ͕ൃల͢Δࡍͷແடংͳ։ൃ

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ߏ੒υϦϑτ wಉҰϩʔϧαʔόʔؒͷෆҰக wಉ͡XXXαʔόͳͷʹ͜Ε͚ͩগ͠ҧ͏ʜ

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εϊʔϑϨʔΫαʔόʔ wಉ͡Α͏ʹݟ͑Δ͕ҟͳΔαʔόʔ w؅ཧ͕ࠔ೉ w࠶ݱ͕ࠔ೉

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γεςϜർ࿑ wΠϯϑϥ͸࣌ؒͷܦաͱͱ΋ʹյΕ͍ͯ͘ wσΟεΫۭ͖༰ྔͷރׇ wΞϓϦέʔγϣϯͷΫϥογϡ w௕ظؒ์ஔͯ͠ΞοϓσʔτෆՄೳʹͳΔ wFUDʜ

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Ϋϥ΢υ͸Ϋϥ΢υͰ೉͍͠ͱ͍͏͜ ͱ͕Θ͔Δ

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Ϋϥ΢υʹΑͬͯੜ·Εͨ՝୊Λղܾ͢Δ w*OGSBTUSVDUVSFBT$PEF͸ࢥ૝ɾ఩ֶ w͜ΕΛ࢖͑͹ղܾ͢Δʂͱ͍͏΋ͷͰ͸ͳ͍ w૊৫ɾαʔϏεͳͲʹΑͬͯϕλʔͳ΋ͷΛબ୒͢Δ

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ਪଌ͢ΔͳɺଌఆͤΑ

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࠷ۙɺো֐͕ଟ͍**ؾ͕**͢Δ

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࠷ۙɺ஗͍**ؾ͕**͢Δ

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ຊ౰ʹʁ

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ͳΜͱͳ͘ɺ͸Α͘ͳ͍ wΤϥʔ΍ۃ୺ʹ஗͔ͬͨ͜ͱ͸هԱʹ࢒Γ΍͍͢ wͦΕ͸͙͢ʹͰ΋௚͢΂͖ͳͷ͔ɺޙʹ͢Δͷ͔ʁ wͲͷ͘Β͍௚ͤ͹Α͍ͷ͔ʁ

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ଌఆ͢Δ͜ͱͰج४ΛܾΊΒΕΔΑ͏ʹͳΔ wଌఆ͢Δ͜ͱͰج४ΛܾΊΒΕΔ wج४͕͋Ε͹͙͢௚͢΂͖͔Ͳ͏͔͕൑அͰ͖Δ wܧଓతʹଌఆ͢Δ͜ͱͰมԽʹؾͮ͘͜ͱ͕Ͱ͖Δ wޮ཰తɾޮՌతͳվળʹܨ͛Δ͜ͱ͕Ͱ͖Δ

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ଌఆྫ wαʔϏεͷ৴པੑΛଌఆɾՄࢹԽ͢Δ wՄ༻ੑɿ੒ޭϦΫΤετ਺૯ϦΫΤετ਺ wϨΠςϯγʔɿϦΫΤετΛड͚औ͔ͬͯΒϢʔβʔ ʹϨεϙϯεΛฦ͢·Ͱͷ࣌ؒ

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ଌఆྫ

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3ճ΍ͬͨΒࣗಈԽ͠Ζ

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3ճ΍ͬͨΒࣗಈԽ͠Ζ wख࡞ۀΛݮΒ͢ wྫɿαʔϏε͕େ͖͘ͳΔʹͭΕͯ࡞ۀྔ͕૿͑Δλ εΫ wࣗಈԽ͢Δ͜ͱͰਓͷख͕ۭ͖ɺΑΓαʔϏεΛ੒௕ ͤ͞ΔͨΊͷ࡞ۀΛߦ͏͜ͱ͕Ͱ͖Δ

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·ͱΊ wιϑτ΢ΣΞΤϯδχΞϦϯάͱγεςϜΤϯδχΞ ϦϯάͰαʔϏεΛվળ wվળՕॴͷൃݟ΍վળ཰ଌఆͷͨΊɺ༷ʑͳଌఆΛ࣮ ࢪ wԿճ΋΍Δ࡞ۀ͸ͲΜͲΜࣗಈԽ͢Δ

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3.Πϯϑϥ୲౰ɺSREͱͯ͠ ಇָ͘͠͞

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Πϯϑϥ୲౰ɺSREͱ͍͏࢓ࣄ͸Θ ͔͖ͬͯͨɻ͚Ͳɺ͜Ε͸΍͍ͬͯͯ ͓΋͠Ζ͍ͷͩΖ͏͔ʁ

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ࣗ෼ͷ৔߹

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1ࣾ໨(1ʙ3೥໨) wαϙʔτΤϯδχΞ͔ΒΩϟϦΞ͕࢝·Δ wސ٬ͱ࿩͠ɺཁ๬Λຬͨ͢ΞϓϦέʔγϣϯΛ։ൃ wࣗࣾͷΞϓϦΛؾܰࢼ͢؀ڥ͕΄͘͠ͳͬͨ w伱ؒ࣌ؒͰ։ൃ

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2ࣾ໨(3೥ʙ4.5೥) w༠ΘΕͨͷͰస৬ wاۀ޲͚ͷΫϥ΢υαʔϏεΛ։ൃɾӡ༻ wΫϥ΢υʮΛʯ࡞Δମݧ wࣾ໨ͷࠒ͸શ͘૝૾͍ͯ͠ͳ͔ͬͨ wαʔϏεج൫΁ͷؔ৺͕ڧ·Δ

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3ࣾ໨(ϖύϘɺ4.5೥ʙݱࡏ) wΑΓϢʔβʔʹ͍ۙ؀ڥʹڵຯ͕ͰͨͷͰస৬ wେྔΞΫηεͷ͋Δ؀ڥʹ਎Λஔ͘͜ͱͰݟ͑Δ΋ͷ wαʔϏεͷج൫վળ wΑΓޮ཰Λ্͛ΔͨΊɺαʔϏε୯ମͰ͸ͳࣾ͘಺ͷ ϓϥΠϕʔτΫϥ΢υʹ΋

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Կָ͕͍͠ͷ͔ʁ wঃʑʹϨΠϠʔͷ௿͍෼໺ʹؔ৺͕Ҡಈ͍ͯ͠Δ w֬ݻͨΔҙࢥͰΩϟϦΞΛੵΜͰ͖ͨΘ͚Ͱ͸ͳ͍ wٕज़ͷߦ࢖ʹΑͬͯ՝୊Λղܾ͢Δͷ͸มΘΒͳ͍ wʢސ٬ͱ࿩ͯ͠ʜͱ͍͏ͷ΋ۤͰ͸ͳ͍

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Կָ͕͍͠ͷ͔ʁ wαʔϏεͷ࣋ͭ՝୊ΛԼͷϨΠϠʔ͔Βղܾ͢Δ w୔ࢁͷཁૉΛ૊Έ߹Θͤͯɺ͏·͘ಈ͘Α͏ʹͭͷ ΋ͷΛ࡞Γ্͛Δύζϧతͳ΋ͷ͕͓΋͠Ζ͍ w(PPHMF΍"84ͷΑ͏ͳੈք࠷ઌ୺ͷΠϯϑϥʹଓ͘ ಓΛਐΜͰ͍Δͱ͍͏࣮ײ

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͓ΘΓʹ

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αʔϏεͷΠϯϑϥΛݟΔͱ͍͏͜ͱ wϢʔβʔ͔Β௚઀ݟ͑Δ৔ॴͰ͸ͳ͍͕ɺαʔϏεΛ ҆ఆͯ͠੒௕ͤ͞ΔͨΊʹෆՄܽ w༷ʑͳΤϯδχΞϦϯάΛۦ࢖