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~ Best Plactice of End of a Subscription Service ~ ͱ͋ΔΞϓϦͷαʔϏεऴྃΛݟಧ͚Δ Ryo Ot a (@m877_778m ) iOSDC202 1 2021-09-18(sat)

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Profile τϏϥγεςϜζגࣜձࣾɹϞόΠϧϓϩμΫτ՝ ଠాɹྒྷɹɹ!N@N ❖ νʔϜϚωδϝϯτ ❖ ϓϩδΣΫτϚωδϝϯτ ❖ ٕज़Ӧۀʢʁʣ ❖ ۃكʹ։ൃʢׂ߹͸ମײͰ͢ʣ ❖ αʔόαΠυɿ ❖ J04ɿ

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ΞϓϦΛΫϩʔζ͢Δ͜ͱͱͳΓ·ͨ͠ ❖ ཧ༝͸ׂѪ͍͖ͤͯͨͩ͞·͢ ❖ ݁Ռ͸Ͳ͏͋Εɺଟ͘ͷϢʔβʹѪ͞ΕͨΞϓϦͰͨ͠ ❖ ࢝·Γͱಉ͘͡Β͍ɺऴΘΓʹ͸͢΂͖͜ͱ͕͋Γ·͢ ❖ Ѫͯ͘͠Εͨօ༷ʹɺײँΛࢥ͍ΛࠐΊͭͭɺΞϓϦͷΫ ϩʔζʹ͍ͭͯ࿩ͯ͠ΈΑ͏ͱࢥ͍·͢

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ΞϓϦͱ๻ͷؔ܎ੑ 2017/8 ϓϩτλΠϓ։ൃ Ϧʔμʔͱͯ͠ࢀՃ 2018/2 ឯ༨ۂં͋ͬͨ΋ͷͷɺ ແࣄ੡඼൛ΛϦϦʔε 2018 Ն Իָੑͷҧ͍ʹΑΓɺνʔϜ୤ୀ 2019/10 ΞϓϦͷ։ൃ͕ఀ଺ঢ়گʹ 2021 ॳՆ αʔϏεऴྃରԠͰ ϓϩδΣΫτʹฦΓ࡙͖ ࣦΘΕͨ2೥ؒ

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ͱ͜ΖͰ

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ͱ͜ΖͰ

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ͱ͜ΖͰ ❖ ຊདྷ͸ɺস͍͋Γɾྦ͋Γͷϋʔτϑϧ੨य़܈૾ܶςΠετʹ࢓্͛ͨ ͔ͬͨ ❖ ͔͠͠ɺ࠷΋఻͍͑ͨͱ͜Ζͷ෼ྔ͕ͦΕͳΓͩͬͨ ❖ υλόλܶΛɺ఻ΘΔΑ͏ʹࢿྉԽͨ͠ΒɺΞχϝͷظ෼ʹ૬౰͢Δ ಺༰ʹͳͬͨ ❖ ෼ʹऩ·ΔΑ͏ʹ·ͱΊΔͱɺ఻͍͑ͨ͜ͱ͕఻ΘΒͳ͍ɺ 
 ͔ͭ૯ूฤΛ͞ΒʹαϚϥΠζͨ͠΋ͷʹͳΔ͜ͱ͕Θ͔ͬͨ

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҆શʹΞϓϦ಺՝ۚΛऴྃͤ͞Δ ˠͦͦ͜͜৘ใ͕ݟ͔ͭΔ ΞϓϦެ։ఀࢭBQQTUPSF ΞϓϦެ։ఀࢭBQQTUPSFαϒεΫʜ ˠཉ͍͠৘ใ͕ݟ͔ͭΒͳ͍ʂ ɹ͔ͭɺࢼ͢ํ๏͸ͳͦ͞͏ʂ Α͘Θ͔Βͳ͔ͬͨͷͰɺৄ͍͠ਓʹฉ͍ͯΈΔ͜ͱʹͨ͠

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҆શʹΞϓϦ಺՝ۚΛऴྃͤ͞Δ ❖ "QQ4UPSF$POOFDU্Ͱɺ=݄ʹͰ͖·͔͢ʁ ❖ =݄͸Ͱ͖ͳ͍Αʂͨͩɺ4VCTDSJQUJPOࣗମΛSFNPWFGSPNTBMFTʹ͢Δ͜ͱͰ ࣅͨΑ͏ͳঢ়ଶΛ࡞Γग़ͤΔΑʂ ❖ ఆظߪಡͷΫϩʔζʹؔͯ͠ɺϕετϓϥΫςΟε͕͋Ε͹ڭ͍͚͑ͯͨͩ·͔͢ʁ ❖ "VUPSFOFXBMTVCTDSJQUJPOΛ࠾༻͍ͯ͠Δ"QQΛΫϩʔζͷ#FTU1SBDUJDF͸ҎԼͷ ௨ΓͩΑʂ "QQ಺Ͱ4VCTDSJQUJPOΛSFNPWFGSPNTBMFTʹ͢Δ೔ʹͪΛϢʔβʔʹࠂ஌͢Δ 4VCTDSJQUJPOΛzSFNPWFGPSTBMFTzʹ͠ɺ৽نߪೖɺ͓Αͼߋ৽Λఀࢭ͢Δ શͯͷTVCTDSJQUJPOϢʔβʔ͕DIVSOPVUͨ࣌͠఺Ͱɺ"QQΛΫϩʔζ͢Δ

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҆શʹΞϓϦ಺՝ۚΛऴྃͤ͞Δ ೔ຊޠͰ͓̺

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҆શʹΞϓϦ಺՝ۚΛऴྃͤ͞Δ ❖ "QQ4UPSF$POOFDU্Ͱɺ=݄ʹͰ͖·͔͢ʁ ❖ =݄͸Ͱ͖ͳ͍Αʂͨͩɺ4VCTDSJQUJPOࣗମΛSFNPWFGSPNTBMFTʹ͢Δ͜ͱͰ ࣅͨΑ͏ͳঢ়ଶΛ࡞Γग़ͤΔΑʂ ❖ ఆظߪಡͷΫϩʔζʹؔͯ͠ɺϕετϓϥΫςΟε͕͋Ε͹ڭ͍͚͑ͯͨͩ·͔͢ʁ ❖ "VUPSFOFXBMTVCTDSJQUJPOΛ࠾༻͍ͯ͠Δ"QQΛΫϩʔζͷ#FTU1SBDUJDF͸ҎԼͷ௨ ΓͩΑʂ "QQ಺Ͱ4VCTDSJQUJPOΛSFNPWFGSPNTBMFTʹ͢Δ೔ʹͪΛϢʔβʔʹࠂ஌͢Δ 4VCTDSJQUJPOΛSFNPWFGSPNTBMFTʹ͠ɺ৽نߪೖɺ͓Αͼߋ৽Λఀࢭ͢Δ શͯͷTVCTDSJQUJPOϢʔβʔ͕DIVSOPVUͨ࣌͠఺Ͱɺ"QQΛΫϩʔζ͢Δ

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҆શʹΞϓϦ಺՝ۚΛऴྃͤ͞Δ SFNPWFGSPNTBMFTz

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҆શʹΞϓϦ಺՝ۚΛऴྃͤ͞Δ SFNPWFGSPNTBMFTz ❖ ʮ"QQ಺՝ۚ؅ཧ՝ۚΞΠςϜ഑৴Մ൱ʯͷ͜ͱ ❖ ΞϓϦͷ՝ۚΞΠςϜͷ഑৴ঢ়گΛ؅ཧ͢Δ ❖ ར༻ՄෆՄͰ͸ͳ͘ɺ഑৴͞Ε͍ͯΔ͔൱͔Ͱ͋Δ ❖ ͜ΕΛ0''ʹ͢ΔͱɺҎ߱ɺߪೖɾࣗಈߋ৽͕Ͱ͖ͳ͘ͳΔ ❖ ഑৴Λఀࢭͯ͠΋ɺߪೖظݶ͕੾ΕΔ·Ͱ͸༗ޮͱͯ͠ѻ͑Δ ❖ Ϩγʔτݕূ΋ਖ਼͍͠Ϩεϙϯε͕ಘΒΕΔ

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҆શʹΞϓϦ಺՝ۚΛऴྃͤ͞Δ ཁ໿͢ΔͱҎԼͷ௨Γ ❖ "QQ4UPSF$POOFDUͰɺΞϓϦ಺՝ۚΞΠςϜͷʮ഑৴ՄೳʯͷνΣο ΫΛ֎͢͜ͱͰɺ৽نߪೖɾߋ৽Λఀࢭ͢Δ ❖ ఀࢭͨ͠ॠ͔ؒΒɺαϒεΫϦϓγϣϯظؒͷܦաΛ଴ͭ ❖ ఀࢭͯ͠΋ɺ՝ۚظؒͷऴྃ·Ͱ༗ޮঢ়ଶΛҡ࣋Ͱ͖Δ ❖ શͯͷ՝ۚϢʔβ͕ଘࡏ͠ͳ͍ঢ়ଶͱͳͬͨΒɺʮՁ͓֨Αͼ഑৴ঢ় گʯͷ഑৴Մ൱Ͱɺʮ഑৴͔Β࡟আʯʹ͢Δ ❖ ͜ΕͰɺ4UPSF͔ΒΞϓϦͷऔಘ͕ෆՄೳͱͳΔ

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҆શʹΞϓϦ಺՝ۚΛऴྃͤ͞Δ ߋʹཁ໿͢Δͱɺ ߪೖఀࢭ೔Λ 
 Ϣʔβࠂ஌ ՝ۚΞΠςϜͷ 
 ഑৴ఀࢭ શϢʔβͷ 
 ՝ۚظؒऴྃ "QQ4UPSFͰͷ 
 ެ։ఀࢭ

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࣮ࡍͷڍಈ ❖ ഑৴ఀࢭલʹ՝ۚ ❖ ՝ۚظݶ͕೔ޙͱͳ͍ͬͯΔ ❖ "QQ4UPSF$POOFDU্Ͱɺ഑৴ఀࢭΛߦ͏ ❖ ߪೖɾ෮ݩ͸Ͱ͖ͳ͘ͳ͍ͬͯΔ ❖ ՝ۚظݶʹมߋͳ͠ʢ೔ޙʣ ❖ ഑৴ఀࢭ͔Β೔ܦա ❖ ظ଴௨Γɺߪೖظݶ੾ΕͱͳΔʢແ՝ۚΞΧ΢ϯτͱͳΔʣ

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ؾʹͳͬͨ͜ͱ ❖ ഑৴ఀࢭͯ͠΋ɺ৽نΠϯετʔϧ͸ࢭΊΒΕ͍ͯͳ͍ ❖ ৽ن՝ۚϢʔβ͸૿͑ͳ͍΋ͷͷɺ৽نϢʔβ͸૿͑Δ ❖ ͔ͤͬ͘Πϯετʔϧͨ͠ͷʹʂঢ়گͷൃੜ͸๷͛ͳ͍ ❖ ͡Ό͋ઌʹΞϓϦΛެ։ఀࢭʹ͢Δํ͕ྑ͘Ͷʁ ɹˠ͜Ε͸ࢼͯ͠ͳ͍ʢϦϦʔεࡁΈΞϓϦͰࢼͤΔΘ͚ͳ͍ʣ ɹˠ΋ͷͷ͍ͭͰʹৄ͍͠ਓʹվΊͯฉ͍ͯΈΔ͜ͱʹ͠Α͏

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ؾʹͳͬͨ͜ͱ ❖ ΞϓϦͷ഑৴ఀࢭ͕ઌͷ΄͏͕ྑ͘ͳ͍Ͱ͔͢ʁ ❖ ༧ظͤ͵ߪೖ͕ى͜ΔՄೳੑ͕͋Γ·͢ɻʢࠂ஌ʹؾ͔ͮͳ͔ͬ ͨϢʔβʔ͕ޡͬͯ*"1Λߪೖͯ͠͠·͏౳ʣ ❖ ্هͷ༷ͳ৔߹ɺ"QQΛμ΢ϯϩʔυ͢ΔϢʔβʔ͕૿͑ΔࣄΑ Γ΋ɺޡͬͯఀࢭ༧ఆͷ*"1Λߪೖ͢ΔϢʔβʔ͕૿͑Δํ͕खଓ ͖͕൥ࡶʹͳΓ·͢ ೔ຊޠͰʜ͋Εʁ

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݁࿦ αϒεΫܕ՝ۚΞΠςϜΛ࣋ͭαʔϏεऴྃͷϕετϓϥΫςΟε͸ɺ ՝ۚΞΠςϜ഑৴ఀࢭͷࠂ஌ ՝ۚΞΠςϜͷ഑৴ఀࢭ ΞϓϦͷެ։ఀࢭ ͷॱʹ࣮ߦ͢Δ͜ͱͰ͋Δʂ

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ࠓճ࿩ͤͳ͔ͬͨ͜ͱ ❖ ϨϏϡʔΛݟฦͯ͠ɺਫ਼ਆ่յ͔͚ͨ͠Ͱ͟͝Δʂͷר ❖ ͓΍͓΍ʁϏϧυͰ͖ͳ͍Ͱ͟͝Δʂͷר ❖ QVTI௨஌഑৴͕େม͗ͯ͢ɺ৽نπʔϧΛಋೖͪ͠Ό͏Ͱ͟͝Δʂͷר ❖ Կ͔ͱͿ͚ͬͭຊ൪Ͱ঎༻࡞ۀͪ͠Ό͏Ͱ͟͝Δʂͷר ❖ Ξϥʔτ໐Γ·͘ΓͰΠϯϑϥνʔϜܹ͓͜Ͱ͟͝Δʂͷר ❖ -1ͱ͔4/4ΞΧ΢ϯτͱ͔ͷΫϩʔζ͕Ҋ֎ΊΜͲ͍ͬͯ࿩ FUDʜ

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Ϋϩʔδϯάεέδϡʔϧʢ༧ఆʣ n n+1 n+2 n+3 ɾݕূ࡞ۀ ɾؔ܎෦ॺͱͷ࿈ܞ ࣾ಺ঝೝ ɾΞϓϦ಺͓஌Βͤ഑৴ ɾपล؀ڥͷఀࢭ -1 ձࣾϗʔϜϖʔδ 4/4ఀࢭͳͲ QVTI௨஌ᶃ ʢঝೝޙଈ࣌௨஌ʣ QVTI௨஌ᶄ ʢϲ݄લʣ QVTI௨஌ᶅ ʢલ೔ʣ ɾΠϯϑϥͷఀࢭ ɾ໰͍߹Θͤͷड෇ऴྃ ɾαʔϏεऴྃ

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Ϋϩʔδϯάεέδϡʔϧʲ࣮੷ʳ n n+1 n+2 n+3 ɾ৺Λ੔͑Δ ɾؔ܎෦ॺͱͷ࿈ܞ ࣾ಺ঝೝ ɾΞϓϦ಺͓஌Βͤ഑৴ʢͿ͚ͬͭຊ൪ʣ ɾपล؀ڥͷఀࢭ -1 ձࣾϗʔϜϖʔδ 4/4ఀࢭͳ QVTI௨஌ᶃʢͿ͚ͬͭຊ൪ʣ ʢঝೝޙଈ࣌௨஌ʣ QVTI௨஌ᶄ ʢϲ݄લʣ QVTI௨஌ᶅ ʢલ೔ʣ ɾΠϯϑϥͷఀࢭ ɾ໰͍߹Θͤͷड෇ऴྃ ɾαʔϏεऴྃ

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Ϣʔβࠂ஌ʹ͍ͭͯ Ϣʔβࠂ஌ͷखஈ ❖ ΞϓϦ಺ͷ͓஌ΒͤQVTI௨஌Y ❖ ձࣾϗʔϜϖʔδͰͷ͓஌Βͤ ҙࣝͨ͜͠ͱ ❖ ΑΓଟ͘ͷ໨ʹ৮ΕΔΑ͏ɺෳ਺ͷํ๏Λ࢖ͬͨ ❖ Ϣʔβʹεέδϡʔϧ͕ݟ͑ΔΑ͏ͳ಺༰ͱͨ͠ ❖ ϢʔβʹͱͬͯෆརӹͱͳΓͦ͏ͳ෦෼ͷӨڹΛ໌֬ʹࣔͨ͠

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࠷ޙʹ ଟ෼ɺผΕ͸ग़ձ͍ͷ͸͡·Γͩͱࢥ͏ Thank you for your listening.