S R E ͷ ஌ ࣝ ஍ ਤ — C H A P T E R 6 & 7 Toil & PRR τΠϧΛͳ͘͠ɺϦϦʔεΛकΔ SAITO Takuro 2026 · Chapter Reading Session 

02 / 12 ࣗݾ঺հ WHO I AM N A M E ᴡ౻ ୓࿕ SAITO Takuro C A R E E R ݩSIer ݱ৬͸ HR Tech ͷԣஅSRE ෳ਺ϓϩμΫτʹ·͕ͨΔࢪࡦΛਪਐɻSRE NEXT ͷӡӦʹ΋ࢀՃ FAV O R I T E L L M gpt-5.4 (fast) opus 4.7 

03 / 12 T W O C H A P T E R S — O N E Q U E S T I O N ৴པੑΛ ࢓૊Έͱ࣮ફͰ࡞Δ C H A P T E R 0 6 τΠϧ / Toil ൓෮తͳӡ༻࡞ۀΛ Ͳ͏ݟۃΊɺͲ͏ݮΒ͔͢ C H A P T E R 0 7 PRR / Production Readiness Review ॏཁͳมߋΛຊ൪ʹग़͢લʹ ԿΛ֬ೝ͢΂͖͔ ͲͪΒ΋ڞ௨͍ͯ͠Δͷ͸ɺ৴པੑΛݱ৔Ͱࢧ͑ΔͨΊͷ ࢓૊Έ ͱ ࣮ફ ͷ࿩Ͱ͋Δɺͱ͍͏͜ͱɻ 

04 / 12 C H A P T E R 0 6 T O I L — D E F I N E , M E A S U R E , R E D U C E τΠϧ ൓෮తͳӡ༻࡞ۀΛݟۃΊɺվળͷ࣌ؒΛऔΓ໭͢ 

05 / 12 6 - 1 · I D E N T I F Y I N G T O I L ·ͣ τΠϧ ͷਖ਼ମΛݟۃΊΔ 0 1 ख࡞ۀ MANUAL 0 2 ൓෮త REPETITIVE 0 3 ࣗಈԽՄೳ AUTOMATABLE 0 4 ઓज़త TACTICAL 0 5 ӬଓతͳՁ஋͕ബ͍ NO ENDURING VALUE 0 6 αʔϏε੒௕ʹ ൺྫͯ͠૿͑Δ O(N) WITH SERVICE GROWTH ໘౗ͳ࢓ࣄΛ͢΂ͯʮτΠϧʯͱݺ͹ͳ͍ɻձٞ΍໨ඪઃఆͳͲͷΦʔόʔϔουͱ͸෼͚ͯߟ͑Δɻ 

06 / 12 6 - 1 · W O R K T Y P E M A T R I X τΠϧͱɺτΠϧͰͳ͍΋ͷ S O F T W A R E E N G I N E E R I N G ιϑτ΢ΣΞΤϯδχΞϦϯά ઃܭɺυΩϡϝϯςʔγϣϯɺίʔυͷ࡞੒ɾมߋɻεέʔϥϏϦςΟ ΍৴པੑͷͨΊͷػೳ௥ՃɺࣗಈԽͳͲ΋ؚΉ S Y S T E M E N G I N E E R I N G γεςϜΤϯδχΞϦϯά ຊ൪γεςϜͷߏ੒มߋɾઃఆมߋɻϞχλϦϯά΍Ξϥʔτઃఆ΋ؚ ΉɻҰճͷมߋͰվળޮՌ͕࣋ଓ͢Δ࡞ۀ T O I L τΠϧ αʔϏεΛՔಇͤ͞ΔͨΊͷ൓෮తͳ࡞ۀ΍ख࡞ۀɻ࡟ݮͷର৅ O V E R H E A D Φʔόʔϔου ࠾༻ۀ຿ɺνʔϜʗձࣾͷձٞ΍τϨʔχϯάͳͲɻτΠϧͱ͸ผ෺ͱ ͯ͠ѻ͏ 

07 / 12 6 - 2 · M E A S U R I N G T O I L τΠϧ͸ײ֮Ͱ͸ͳ͘ ଌΔ G O O G L E ' S G U I D E L I N E 50% τΠϧ࣌ؒͷ্ݶͱͯ͠ SRE BookͰࣔ͞ΕΔ໨҆ ஋ RULE / REFERENCE ܭଌͷ୅දྫ — How to measure 0 1 ࣌ؒه࿥πʔϧͰτΠϧ࣌ؒΛऔΔ λΠϜτϥοΩϯάͰ೔࣍ͷʮԿʹ࣌ؒΛ࢖͔ͬͨʯΛՄࢹԽ 0 2 νέοτ਺Λूܭ͢Δ Issue/IncidentτϥοΧʔͷରԠ݅਺Λ࣌ܥྻͰ೺Ѳ 0 3 खಈରԠͷճ਺Λ਺͑Δ ΞϥʔτରԠɾखಈσϓϩΠͳͲͷΧ΢ϯτΛऔΔ 

08 / 12 6 - 3 · R E D U C I N G T O I L τΠϧ࡟ݮΛͲ͏ਐΊΔ͔ 0 1 ఆٛ͢Δ D E F I N E 0 2 ଌΔ M E A S U R E 0 3 ໨ඪΛஔ͘ S E T T A R G E T S 0 4 ݮΒ͢ R E D U C E 0 5 ޮՌΛݟΔ R E V I E W M E A N S O F R E D U C T I O N ࡟ݮͷखஈ͸ ࣗಈԽ͚ͩͰ͸ͳ͍ ࡞ۀΛ΍ΊΔ γεςϜΛม͑Δ SLOΛ࢖ͬͯରԠෆཁͱ൑அ͢Δ ηϧϑαʔϏεԽ͢Δ 

09 / 12 C H A P T E R 0 7 P R O D U C T I O N R E A D I N E S S R E V I E W PRR ॏཁͳมߋΛຊ൪ʹग़͢લʹɺӡ༻Ͱ͖Δঢ়ଶ͔Λ֬ೝ͢Δ 

10 / 14 7 - 0 · W H A T I S P R R ·ͣ PRR ͱ͸Կ͔ 0 1 ຊ൪લͷϨϏϡʔ PRE-PRODUCTION REVIEW ॏཁͳมߋΛຊ൪؀ڥʹϦϦʔε͢Δલʹɺຊ൪ӡ༻ͷ৚݅Λຬ͍ͨͯ͠Δ ͔Λ֬ೝ͢Δϓϩηε 0 2 ଟ৬छͰڠۀ CROSS-TEAM COLLABORATION ։ൃɾηΩϡϦςΟɾӡ༻ͳͲɺؔ܎ऀ͕ڠྗͯ͠՝୊Λચ͍ग़͠ղফ͢Δ 0 3 ஈ֊తʹ࣮ࢪ THROUGHOUT THE LIFECYCLE ϦϦʔε௚લ͚ͩͰͳ͘ɺ։ൃϥΠϑαΠΫϧͷ֤ஈ֊Λ௨ͯ͡ϨϏϡʔ͢Δ 0 4 վળࢤ޲ɾະདྷࢤ޲ IMPROVEMENT-ORIENTED ຊ൪ՔಇͷϋʔυϧͰ͸ͳ͘վળ఺ͷಛఆͱղফʹॏ఺Λஔ͖ɺࠓޙͷมߋ Λର৅ʹ͢ΔʢաڈʹḪٴ͠ͳ͍ʣ Google SRE ͷϓϥΫςΟεʹ༝དྷ͠ɺଟ͘ͷ૊৫Ͱߴੑೳͳιϑτ΢ΣΞӡ༻ͱܧଓతվળͷͨΊʹ׆༻͞Ε͍ͯΔɻ 

11 / 14 7 - 1 · P R O D U C T I O N R E A D I N E S S R E V I E W PRR͸ຊ൪લͷ ηʔϑςΟωοτ ։ൃΛࢭΊΔ͜ͱͰ͸ͳ͘ɺ ໰୊Λૣ͘ݟ͚ͭͯ௚͢ ɻ ৴པੑ͸ϦϦʔεޙʹؾͮ͘ͷͰ͸ͳ͘ɺ ϦϦʔεલʹ४උ͢Δɻ ୅ ද త ͳ ֬ ೝ ର ৅ — T Y P I C A L C H E C K I T E M S 01 υΩϡϝϯτ DOCUMENTATION 02 ϦϦʔεखॱ / ϩʔϧόο Ϋ RELEASE & ROLLBACK 03 ؂ࢹ MONITORING 04 ύϑΥʔϚϯε PERFORMANCE 05 ηΩϡϦςΟ SECURITY 06 ճ෮ੑ RESILIENCE 

12 / 14 7 - 2 · S C O P E & R E S P O N S I B I L I T Y ͢΂ͯͷมߋͰ͸ͳ͘ɺॏཁͳมߋʹରͯ͠ߦ͏ ର৅ΛܾΊΔج४ͱɺؔ܎ऀͷ໾ׂ෼୲ ର ৅ Λ ܾ Ί Δ ج ४ — C R I T E R I A ϏδωεӨڹ͕େ͖͍ ৽نੑ͕ߴ͍ ΞʔΩςΫνϟมߋ͕͋Δ աڈʹো֐Λى͍ͯ͜͠Δ ϨϏϡʔ͸߹൱൑ఆͰ͸ͳ͘ ʮվળ׆ಈʯʹ͢Δ PRRνΣοΫϦετେ߲໨ ։ൃ ηΩϡϦςΟ ӡ༻ PO ઃܭ · υΩϡϝϯτ R C C I ϦϦʔεखॱ C C R I ύϑΥʔϚϯε R C C A ηΩϡϦςΟ C R C A ճ෮ੑ R C C A R ࣮ߦ੹೚ A ঝೝ੹೚ C ڠۀ I ৘ใఏڙ 

13 / 14 7 - 3 · M A K E P R R A S Y S T E M PRRΛ ࢓૊Έ ʹ͍ͯ͘͠ C I / C D — A U T O M A T E ػցʹ೚ͤΔ ੬ऑੑεΩϟϯ ෛՙࢼݧ ϩάઃఆ σϓϩΠखॱͷݕূ R E V I E W — H U M A N ਓ͕ݟΔ΂͖΋ͷ Өڹൣғͷଥ౰ੑ ΞʔΩςΫνϟͷਖ਼౰ੑ มߋͷϦεΫ ϩʔϧόοΫઓུͷݱ࣮ੑ Platform Engineering ʹΑͬͯඪ४Խ͕ਐΉͱɺPRR͸ຖճͷ֬ೝͰ͸ͳ͘ʮ࢓૊ΈͰຬͨ͢ʯํ޲ʹਐΊΒΕΔɻ 

14 / 14 O V E R T O Y O U Έͳ͞Μͷݱ৔Ͱ͸ɺͲ͏Ͱ͔͢ʁ τΠϧ࡟ݮɺ࣮ࡍʹͰ͖͍ͯ·͔͢ʁ͍·ࠔ͍ͬͯΔ τΠϧ ͸ԿͰ͔͢ʁ AI ʹΑͬͯɺτΠϧ͸Ͳ͏มΘ͍ͬͯ·͔͢ʁ PRRɺ΍͍ͬͯ·͔͢ʁࠔ͍ͬͯΔ͜ͱ͸ͳΜͰ͔͢ʁ AI ͰࣗಈԽɾPlatformԽ ͍ͯ͠Δ PRR ͸͋Γ·͔͢ʁ EOF