会社訪問アプリ「Wantedly Visit」における相互推薦システムの応用事例 / deim2020-rrs-wantedly-visit

3c0649db1ae5ca0ae57c76037243f501?s=47 Yuya Matsumura
March 03, 2020
Science
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1.9k

会社訪問アプリ「Wantedly Visit」における相互推薦システムの応用事例 / deim2020-rrs-wantedly-visit

2020年3月3日 DEIM2020 (https://db-event.jpn.org/deim2020/index.html) における技術報告の資料です。

[B4] 情報推薦②　3月3日 13:30 ～ 15:10
https://cms.deim-forum.org/deim2020/program/?oral#/B4

本番ではこの資料の縮小版で発表を行っています。

従来の推薦システムと比較した「相互推薦システム」の特徴や課題を説明し，
それらに対して Wantedly Visit ではどのような考えでどのような取り組みを行っているのか簡単に紹介しました。

3c0649db1ae5ca0ae57c76037243f501?s=128

Yuya Matsumura

March 03, 2020
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Transcript

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    w ૬ޓਪનγεςϜ w ੵۃతʹೳಈతʹߦಈ͢ΔϢʔβ΋͍Ε͹ɼʮ޷ҙʯ͕ࣔ͞ΕΔͷΛ଴͕ͪͪͳडಈతͳ Ϣʔβ΋͍Δɻ w TVCKFDUଆͷϢʔβ͔Βࣔ͞ΕΔʮ޷ҙʯʹରͯ͠ϦΞΫγϣϯΛ͢Δ͚ͩͰ΋αʔϏεΛར༻͢Δ໨త͸ ୡ੒ՄೳͰ͋Δɻ w डಈతͳϢʔβ͕γεςϜ্ͰTVCKFDUଆͷϢʔβʹਪન͞Εͳ͍ͱɼ੒ޭମݧΛಘΒΕͳ͍͜ͱʹͳΔɻ

  24. ©2020 Wantedly, Inc.  ਪનͷ੒ޭ ‣ ਪનΛड͚ΔϢʔβ TVCKFDU ͱਪન͞ΕΔϢʔβ PCKFDU

    ͷ྆ํͷᅂ޷͕Ұகͯ͠ॳΊͯਪન͕੒ޭ͢Δɻ  ਪનγεςϜʹର͢ΔϢʔβͷೝࣝ ‣ TVCKFDUଆͷϢʔβࣗ਎͕૬ޓਪનγεςϜͰ͋Δ͜ͱΛೝ্ࣝͨ͠ͰɼPCKFDUଆͷϢʔβͷ͜ͱΛߟ͑ͯߦಈ͢Δɻ  Ϣʔβ͔Β໌ࣔతʹఏڙ͞ΕΔϓϩϑΟʔϧ΍ᅂ޷ʹ͍ͭͯͷ৘ใ ‣ Ϣʔβ͕ࣗ਎Ͱఏڙ͢Δ໌ࣔతͳϓϩϑΟʔϧ΍ᅂ޷৘ใ͕๛෋͕ͩɼͦΕΒ͕ਖ਼͍͠ͱ͸ݶΒͳ͍ɻ  ϢʔβͷϥΠϑαΠΫϧ ‣ ϢʔβͷϥΠϑαΠΫϧ͕୹͘ɼϢʔβͷߦಈʹجͮ͘҉໧తͳϢʔβͷᅂ޷৘ใ͕ू·Γʹ͍͘ɻ  ϢʔβͷγεςϜ಺ʹ͓͚Δߦಈͷ࢟੎ ‣ ೳಈతͳϢʔβͱडಈతͳϢʔβ͕͍ΔɻडಈతͳϢʔβ͸ਪન͞Εͳ͍ͱ੒ޭମݧΛಘΒΕͳ͍ɻ ૬ޓਪનγεςϜͷಛ௃΍՝୊

  25. ©2020 Wantedly, Inc. ؔ࿈ݚڀطଘख๏ ✓ [RECON] (Pizzato 2010) RECON: A

    Reciprocal Recommender for Online Dating ‣ աڈʹ޷ҙΛࣔͨ͠૬खͷϢʔβʹڞ௨͢Δཁૉ͔ΒɼϢʔβ͝ͱͷ҉໧తͳᅂ޷৘ใʢetc. ମܕɼਖ਼֬ɼֶྺ…ʣΛநग़ɻ ‣ நग़ͨ͠ᅂ޷৘ใͱ૬खͷϢʔβͷϓϩϑΟʔϧͷҰக౓Λܭࢉ͢ΔίϯςϯπϕʔεͰ୯ํ޲ͷద߹౓Λද͢ Preference Score Λࢉग़ɻ ‣ ̎ͭͷ Preference Score ͔ΒAggregation Function(ௐ࿨ฏۉ)Ͱ૒ํ޲ͷద߹౓Λද͢ Reciprocal Preference Score Λࢉग़ɻ ✓ [RCF] (Xia 2015) Reciprocal Recommendation System for Online Dating ‣ ߦಈཤྺʹجͮ͘ϢʔβϕʔεͷڠௐϑΟϧλϦϯάʢk-ۙ๣ʣͰPreference Score Λࢉग़ɻ ‣ Aggregation Function ͸ௐ࿨ฏۉΛར༻ɻ ‣ RECON (Pizzato 2010) ͷੑೳΛେ෯ʹ௒͑Δɻ ✓ [LFRR](Neve 2019) Latent Factor Models and Aggregation Operator for Collaborative Filtering in Reciprocal Recommender Systems ‣ ߦಈཤྺʹج͖ͮ࡞੒ͨ͠ User-User ߦྻʹMatrix Factorization Λద༻ͯ͠ Preference Score Λࢉग़ɻ ‣ Aggregation Function ʹ͍ͭͯɼௐ࿨ฏۉҎ֎ͷؔ਺ʹ͍ͭͯ΋ൺֱ࣮ݧͨ͠ɻ ‣ ੑೳ͸ RCF (Xia 2015) ͱಉఔ౓͕ͩɼࣄલʹϞσϧΛֶश͓͚ͯ͠ΔͷͰߴ଎ɻ User A to User B Preference Score User B to User A Preference Score Reciprocal Preference Score Aggregation Function

  26. ©2020 Wantedly, Inc.  ͸͡Ίʹ w ࣗݾ঺հɼձࣾͱϓϩμΫτͷ঺հ w ϓϩμΫτʹ͓͚ΔσʔλαΠΤϯεͷऔΓ૊Έࣄྫ 

    ૬ޓਪનγεςϜͱ͸ w ֓ཁɼैདྷͷਪનγεςϜͱൺ্ֱͨ͠Ͱͷಛ௃ͱ՝୊  ձࣾ๚໰ΞϓϦʮ8BOUFEMZ7JTJUʯʹ͓͚Δ૬ޓਪનγεςϜ w 8BOUFEMZ7JTJUʹ͓͚Δ૬ޓਪનγεςϜͷಛ௃ͱ՝୊ɼٴͼऔΓ૊Έ ձࣾ๚໰ΞϓϦʮ8BOUFEMZ7JTJUʯʹ͓͚Δ૬ޓਪનγεςϜͷԠ༻ࣄྫ

  27. ©2020 Wantedly, Inc. ਪનͷ੒ޭ ‣ ਪનΛड͚ΔϢʔβ TVCKFDU ͱਪન͞ΕΔϢʔβ PCKFDU ͷ྆ํͷᅂ޷͕Ұகͯ͠ॳΊͯਪન͕੒ޭ͢Δɻ

    User(Recruiter/Company) User(Job Seeker) w 8BOUFEMZ7JTJUʹ͓͚Δਪનͷ੒ޭͷఆٛ w ٻ৬ऀϢʔβʮ࿩Λฉ͖ʹߦ͖͍ͨʢԠืʣʯˠاۀϢʔβʮฦ৴ʯ w اۀϢʔβʮεΧ΢τʯˠٻ৬ऀϢʔβʮฦ৴ʯ w ຊ౰ʹϚονͨ͠ͷ͔Ͳ͏͔͸ɼ྆ऀΛΠϯλϏϡʔͰ΋͠ͳ͍ͱ෼͔Βͳ͍ʜɻ ࿩Λฉ͖ʹߦ͖͍ͨʢԠืʣ ฦ৴ User(Recruiter/Company) User(Job Seeker) ฦ৴ εΧ΢τ ˠϝοηʔδͷԟ෮ճ਺΍ฦ৴͢Δ·Ͱͷ࣌ؒΛߟྀͯ͠ɼਪનͷ੒ޭΛఆٛ͢Δɻ w ʮΧδϡΞϧͳձࣾ๚໰ʯΛఏڙ͢ΔαʔϏεނɼٻ৬ऀϢʔβͷϞνϕʔγϣϯ΋༷ʑ w FYʮࠓ͙͢స৬͍ͨ͠ʂʯɼʮ௚ۙͰస৬ͷ༧ఆ͸ͳ͍͚Ͳɼ໘നͦ͏ͳͱ͜Ζ͕͋Ε͹ͱΓ͋͑ͣ࿩Λฉ͖ʹ͍͖͍ͨʯ w ਪન͕͏·͍͔͘ͳ͔ͬͨͱ͖ͷωΨςΟϒͳମݧͷେ͖͞΋ϢʔβʹΑͬͯҟͳΔɻ ˠϞσϦϯάͷࡍʹϢʔβͷϞνϕʔγϣϯͳͲΛߟྀͨ͠޻෉Λ͢Δɻ

  28. ©2020 Wantedly, Inc. ਪનγεςϜʹର͢ΔϢʔβͷೝࣝ w TVCKFDUଆͷϢʔβࣗ਎͕૬ޓਪનγεςϜͰ͋Δ͜ͱΛೝ্ࣝͨ͠ͰɼPCKFDUଆͷϢʔβͷ͜ͱΛߟ͑ͯߦಈ͢Δɻ w اۀϢʔβͷεΧ΢τ͸༗ྉͰ͋ΔͷͰɼ͜ͷ܏޲͕ڧ͍ͱߟ͑ΒΕΔɻ w ࣗࣾʹͱͬͯັྗతͰ΋ɼͦͷٻ৬ऀϢʔβ͕ઈରʹࣗࣾʹڵຯΛ࣋ͬͯ͘Εͳͦ͞͏ͳΒ͹εΧ΢τΛૹΔ͜ͱΛ᪳᪯͢Δɻ

    w ҰํͰɼΩϟϯϖʔϯͳͲͰແྉͰεΧ΢τΛૹΕΔ͜ͱ΋ɻ͜ͷࡍ͸͍ͭ΋ͱҧ͏ߦಈΛͱΔ͔΋ʜʁ w աڈʹૹ৴ͨ͠εΧ΢τ͔ΒاۀϢʔβͷᅂ޷৘ใΛ࡞੒͢Δࡍ͸ɼεΧ΢τͷछྨΛߟྀ͢Δɻ ˠաڈʹૹ৴ͨ͠εΧ΢τ͔ΒاۀϢʔβͷᅂ޷৘ใΛ࡞੒͢Δࡍ͸ɼεΧ΢τͷछྨΛߟྀͨ͠޻෉Λ͢Δɻ w ٻ৬ऀϢʔβ͸ൺֱత͜ͷ܏޲͕ऑ͍ͱߟ͑ΒΕΔɻ w ٻ৬ऀϢʔβ͕ԠืͰ͖Δ਺ʹ੍ݶͳͲ͸ͳ͍͠ɼҰൠతͳٻਓαΠτʹൺ΂ͯΧδϡΞϧʹԠืͰ͖ΔαʔϏεͰ͋ΔͨΊɼࣗ෼ ͷᅂ޷ͷΈʹج͍ͮͯͨ͘͞ΜԠืΛߦ͏܏޲ͷϢʔβ͕ଟʑ͍Δɻ w ҰํͰɼͬ͘͡Γͱ͓ޓ͍ͷᅂ޷͕Ϛον͍ͯ͠Δ͔Λߟ͑ͯগ਺ͷԠืΛ͍ͯ͠Δٻ৬ऀϢʔβ΋΋ͪΖΜଘࡏ͢Δɻ ˠաڈͷԠื৘ใ͔Βٻ৬ऀϢʔβͷᅂ޷৘ใΛ࡞੒͢Δࡍ͸ɼϢʔβͷԠืͷॏΈΛߟྀͨ͠޻෉Λ͢Δɻ

  29. ©2020 Wantedly, Inc. Ϣʔβ͔Β໌ࣔతʹఏڙ͞ΕΔϓϩϑΟʔϧ΍ᅂ޷ʹ͍ͭͯͷ৘ใ w Ϣʔβ͕ࣗ਎Ͱఏڙ͢Δ໌ࣔతͳϓϩϑΟʔϧ΍ᅂ޷৘ใ͕๛෋͕ͩɼͦΕΒ͕ਖ਼͍͠ͱ͸ݶΒͳ͍ɻ w ٻ৬ऀϢʔβͷํ͕͜ͷ܏޲͕ڧ͍ɻ w αʔϏεొ࿥࣌ʹࣗ෼ͷڵຯͷ͋Δ৬छΛબ୒͢Δɻ

    w ࣮ࡍʹԠืͨ͠ืूͷ৬छͱҰக͍ͯ͠ͳ͍΋ͷ͕͚ͬ͜͏ͳׂ߹ଘࡏ͢Δɻ w ࠷ॳʹ৬छΛબ୒ͨ࣌͠఺Ͱ͸ɼࣗ෼͕ຊ౰ʹ΍Γ͍ͨ͜ͱ͕·ͩ͸͖ͬΓ͍ͯ͠ͳ͍ɻ w αʔϏεΛར༻͍ͯ͠Ζ͍ΖͳืूΛݟͨΓ࿩Λฉ͍͍ͯΔ͏ͪʹ͸͖ͬΓ͍ͯ͘͠ɻ ˠߦಈཤྺ͕஝ੵ͞ΕΔʹͭΕɼίϯςϯπϕʔε͔ΒߦಈཤྺϕʔεͷਪનʹҠߦ͍ͯ͘͠ɻ

  30. ©2020 Wantedly, Inc. ϢʔβͷϥΠϑαΠΫϧ w ϢʔβͷϥΠϑαΠΫϧ͕୹͘ɼϢʔβͷߦಈʹجͮ͘҉໧తͳϢʔβͷᅂ޷৘ใ͕ू·Γʹ͍͘ɻ w ʮγΰτ୳͠ʯҎ֎ͷจ຺ͷػೳ w ʮ'FFEʢϒϩάػೳʣʯ΍ʮ.FFUVQʢΠϕϯτืूػೳʣʯͳͲͷɼΑΓΧδϡΞϧʹར༻Ͱ͖Δػೳ΋ఏڙ͍ͯ͠Δɻ

    w ͭͳ͕Γ؅ཧΞϓϦʮ8BOUFEMZ1FPQMFʯͱ͍͏ɼస৬ʹؔ܎ͳ͘೔ৗ͔Βར༻͢ΔΞϓϦ΋ఏڙ͍ͯ͠Δɻ ˠʮγΰτ୳͠ʯͱ͍͏Ұ࣌తͳ׆ಈҎ֎ͷจ຺ʹ͓͚Δ༷ʑͳߦಈཤྺ͕஝ੵ͞ΕΔɻ w ʮΧδϡΞϧͳձࣾ๚໰ʯͷαʔϏεͳͷͰɼʮγΰτ୳͠ʯͷจ຺Ͱ΋ͦ΋ͦ΋ϥΠϑαΠΫϧ͕௕͍ w స৬ҙཉͷߴ·Δલ͔ΒϢʔβ͕ొ࿥ͯ͘͠Ε͍ͯΔ͜ͱ΋ଟ͍ɻ w స৬ޙͰ͋ͬͨͱͯ͠΋ɼؾܰʹձࣾ๚໰͕Ͱ͖ΔαʔϏεʢΛ໨ࢦ͍ͯ͠Δʣɻ ˠʮγΰτ୳͠ʯͱ͍͏Ұ࣌తͳ׆ಈͷจ຺ʹ͓͍ͯ΋ൺֱత௕͍ظؒͷߦಈཤྺ͕஝ੵ͞ΕΔɻ ˠෳ਺ͷػೳͰͷཤྺΛ૊Έ߹ΘͤͯҙਤΛ἞ΈऔͬͨΓɼ࣌ؒͰॏΈ෇͚Λ͢ΔͳͲ޻෉͢Δɻ w ༷ʑͳจ຺ػೳ΍Ϟνϕʔγϣϯͷߴ͞Ͱར༻͞ΕΔαʔϏε͔ͩΒͦ͜ɼߦಈཤྺͷѻ͍͕೉͍͠ɻ w .FFUVQػೳͰاۀʹԠื͔ͨ͠Βͱ͍ͬͯɼͦͷاۀʹస৬ͷจ຺Ͱڵຯ͕͋Δͱ͸ݶΒͳ͍ɻ w ಉ͡ʮԠืʯͰ΋ɼస৬͍ͨ͠Ԡืͳͷ͔ͨͩڵຯ͕͋Δ͔Β࿩Λฉ͍ͯΈ͍ͨԠืͳͷ͔Ͱ͸શ͘ҙຯ͕ҧ͏ɻ

  31. ©2020 Wantedly, Inc. ϢʔβͷγεςϜ಺ʹ͓͚Δߦಈͷ࢟੎ w ೳಈతͳϢʔβͱडಈతͳϢʔβ͕͍ΔɻडಈతͳϢʔβ͸ਪન͞Εͳ͍ͱ੒ޭମݧΛಘΒΕͳ͍ɻ w ʮԠืʯΛ͢Δ͜ͱ͕໨తͳϢʔβͱʮεΧ΢τʯΛड͚औΔ໨తͷϢʔβ͕ࠞࡏ͢Δɻ w ʮεΧ΢τʯΛड͚औΔ໨తͷडಈతͳٻ৬ऀϢʔβ͸اۀϢʔβͷεΧ΢τػೳͰਪન͞Εͳ͍ݶΓϚονϯά͸ੜ·Εͳ

    ͍ɻ w ҰํͰɼͨ͘͞ΜʮԠืʯͯ͘͠ΕΔೳಈతͳٻ৬ऀϢʔβͷํ͕৘ใ΋ͨ͘͞Μ͋ΔͨΊɼاۀϢʔβʹରͯ͠΋ൺֱత࣭ ͷߴ͍ਪન͕ՄೳͰ͋Δɻ ˠೳಈతͳϢʔβͱडಈతͳϢʔβ͕ਪનʹؚ·ΕΔׂ߹Λ޻෉͢Δɻ w डಈతͳϢʔβͷதʹ͸ɼͦ΋ͦ΋શ͘Ϟνϕʔγϣϯ͕ͳͯ͘ͲΜͳεΧ΢τΛड͚औͬͯ΋ฦ৴ ͠ͳ͍Α͏ͳϢʔβ΋Ұఆ਺ଘࡏ͢Δɻ w ਪન͕ѱ͍ͷ͔Ϟνϕʔγϣϯ͕௿ͯ͘ฦ৴͢Δؾ͕ͳ͍ͷ͔ͷ۠ผ͸೉͍͠ɻ ˠड͚औͬͨεΧ΢τ΁ͷฦ৴཰΍αʔϏε಺ͷΞΫςΟϒ཰ͳͲͰϞνϕʔγϣϯΛਪଌͯ͠׆༻͢Δɻ

  32. ©2020 Wantedly, Inc. ਪનγεςϜͷߏங User(Recruiter/Company) User(Job Seeker) some models ༷ʑͳαʔϏεಛ༗ͷॲཧ

    Good Recommendations ༷ʑͳ޻෉ΛڽΒͨͨ͘͠͞Μͷಛ௃ྔ ࠓޙͷਓੜʹؔΘΔΑ͏ͳαʔϏεͰ͋ΔͨΊ 'BJSOFTTͷ͜ͱ΋ҙࣝͨ͠ಛ௃ྔબ୒ Ұఆͷઆ໌ੑ͕ٻΊΒΕΔ͜ͱΛ ߟྀͨ͠NPEFMͷબ୒ ޿ࠂ࿮ɼεύϜϢʔβɼॴଐͯ͠ ͍Δձࣾͷืू͸ग़͞ͳ͍ɼFUD ৽͍͠ϩδοΫͷ࡞੒࣌ʹ͸"#ςετ΍ *OUFSMFBWJOHͳͲͰΦϯϥΠϯςετΛ࣮ࢪ ৽͍͠ϩδοΫΛαʔϏεͰΦϯϥΠϯςετ͢Δલ ʹɼաڈσʔλΛ༻͍ͯΦϑϥΠϯςετΛ࣮ࢪ͢Δɻ ϓϩϑΟʔϧɼߦಈཤྺ ධՁࢦඪʹجͮ͘ఆྔධՁ͚ͩͰ͸ͳ͘ɼ࣮ࡍʹਓͷ໨Ͱ ݟ͓͔͍ͯ͠ਪનʹͳ͍ͬͯͳ͍ͷ͔ఆੑධՁ΋ߦ͏ɻ ϦϦʔεޙ΋ɼֶश͕͏·͘ߦΘΕ͍ͯΔ͔ɼ௥͍ͬͯΔ ࢦඪ͸ͲͷΑ͏ʹมԽ͍ͯ͠Δ͔ͳͲΛ؂ࢹ͢Δɻ ఆੑධՁ΋ఆظతʹߦ͏ɻࣾһ͕໨ͰݟͨΓɼ ੈͷதͷ੠ʢ5XJUUFSʣΛर͏ɻ

  33. ©2020 Wantedly, Inc. ͓ΘΓʹ  ΢ΥϯςουϦʔɿʮγΰτͰίίϩΦυϧͻͱΛ;΍͢ʯ w ʮγΰτ͸໘ന͍΋ͷͩʯͱ͍͏ߟ͑Λ౰ͨΓલʹɻ w ձࣾ๚໰ΞϓϦʮ8BOUFEMZ7JTJUʯͭͳ͕Γ؅ཧΞϓϦʮ8BOUFEMZ1FPQMFʯ

     ૬ޓਪનγεςϜɿʮαʔϏε಺ͷϢʔβΛޓ͍ʹਪન͢ΔγεςϜʯ w ैདྷͷਪનγεςϜͱҟͳΔ༷ʑͳಛ௃΍՝୊ɻ ‣ ਪનΛड͚ΔϢʔβ TVCKFDU ͱਪન͞ΕΔϢʔβ PCKFDU ͷ྆ํͷᅂ޷͕Ұகͯ͠ॳΊͯਪન͕੒ޭ͢Δɻ ‣ TVCKFDUଆͷϢʔβࣗ਎͕૬ޓਪનγεςϜͰ͋Δ͜ͱΛೝ্ࣝͨ͠ͰɼPCKFDUଆͷϢʔβͷ͜ͱΛߟ͑ͯߦಈ͢Δɻ ‣ Ϣʔβ͕ࣗ਎Ͱఏڙ͢Δ໌ࣔతͳϓϩϑΟʔϧ΍ᅂ޷৘ใ͕๛෋͕ͩɼͦΕΒ͕ਖ਼͍͠ͱ͸ݶΒͳ͍ɻ ‣ ϢʔβͷϥΠϑαΠΫϧ͕୹͘ɼϢʔβͷߦಈʹجͮ͘҉໧తͳϢʔβͷᅂ޷৘ใ͕ू·Γʹ͍͘ɻ ‣ ೳಈతͳϢʔβͱडಈతͳϢʔβ͕͍ΔɻडಈతͳϢʔβ͸ਪન͞Εͳ͍ͱ੒ޭମݧΛಘΒΕͳ͍ɻ  ʮ8BOUFEMZ7JTJUʯʹ͓͚Δཧ૝ͷϚονϯάΛ࣮ݱ͢Δ૬ޓਪનγεςϜ w ૬ޓਪનγεςϜಛ༗ͷಛ௃΍՝୊Λߟྀͭͭ͠ɼ༷ʑͳ޻෉Λࢪ͢ɻ w 'BJSOFTT΍આ໌ੑͳͲɼߟ͑Δ͜ͱ͸ͨ͘͞Μ͋Δɻ w ΑΓΑ͍ਪનͷͨΊʹ͸ఆྔతͳධՁ͚ͩͰ͸ͳ͘ɼఆੑతͳධՁ΋ඞਢɻ

  34. ©2020 Wantedly, Inc. We are hiring!! https://www.wantedly.com/projects/418207

  35. ©2020 Wantedly, Inc. 3FGT • (Pizzato 2010) Luiz Pizzato, Tomek

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