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見積もりづくりについて
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3100
October 22, 2013
Technology
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見積もりづくりについて
「アジャイルな見積もりと計画づくり」の前半部分について、社内勉強会向けにまとめました。
3100
October 22, 2013
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Transcript
ݟੵΓͮ͘Γ ʹ͍ͭͯ !JQM
ಥવͰ͕͢ ීஈͲ͏ͬͯ ݟੵΓ ͯ͠·͔͢ʁ
ݟੵΓͷ 11% 3% 6% 14% 15% 17% 34% ྨਪ๏ FP๏
WBS ར༻͠ͳ͍ ίʔυߦ ෆ໌ ͦͷଞ (ITpro - ݟੵΓʹؔ͢Δҙࣝɾ࣮ଶௐࠪ : 20047݄)
ྨਪ๏ ͍ΘΏΔܦݧͱצ աڈʹࣅͨΑ͏ͳϓϩδΣΫτ͕͋Εɺ͍͍ਫ਼ ΛಘΒΕΔ͜ͱʁ
'1๏ ྨਪ๏ΑΓߴͰɺՊֶత ݟੵΓʹඞཁͳ߲͕ଟͯ͘ɺෳࡶ
ෆ࣮֬ੑίʔϯ 0.4 0.6 0.8 1 1.2 1.4 1.6 ॳ ظ
ͷ ϓ ϩ μΫ τ ఆ ٛ ঝ ೝ ͞ Ε ͨ ϓ ϩ μΫ τ ఆ ٛ ཁ ٻ ༷ ϓ ϩ μΫ τ ͷ ઃ ܭ ༷ ৄ ࡉ ઃ ܭ ݕ ऩ ͞ Ε ͨ ι ϑ τ Σ Ξ ࣮ࡍͷظؒ(ഒ) (Barry W. Boehm : 1981)
ݟੵΓ͍͠
ݟੵΓͰͳ͘ ݟੵΓͮ͘Γʹ যΛ͋ͯͯΈΑ͏
ݟੵΓͷ ༷͕ݻ·ΔલͰɺਫ਼͕ྑ͘ͳ͍ ਫ਼͕ྑ͘ͳ͍ͷʹཤߦٻΊΒΕΔ ݁ՌɺԆػೳॖখ͕͓͜Δ ಉ͜͡ͱͷ܁Γฦ͠
ݟੵΓͮ͘ΓΛؤுΔ ༷มΘΔɺݟੵΓมΘΔ ސ٬ͷ༏ઌͷߴ͍༷͔Β࣮͢Δ ݟੵΓͷཤߦΛଋ͠ͳ͍
Ͳ͏͍͏͜ͱʁ ظؒΛਖ਼֬ʹݟੵΕΔͱ͍͏ݬΛࣺͯΔ ݟੵΓҰఆظؒຖɺঢ়گʹԠͯ͡ߋ৽͞ΕΔ ݟੵΓ͋͘·ͰݟੵΓɺଋ͠ͳ͍
ݟੵΓͷ์غʁ มԽΛड͚ೖΕɺॊೈʹରԠ͢ΔͨΊͷͷ ϦεΫϚωδϝϯτख๏ ϓϩδΣΫτͷ࠷ऴஈ֊ͰԆ͕ൃ֮͢ΔΑΓ ɺ్தͰൃ֮ͨ͠΄͏͕μϝʔδ͘͢ͳ͍Α Ͷʁ
ͦΜͳΜ্ख͍͘͘ͷʁ چSun MicrosystemsYahoo!ͰޮՌΛ ͍͋͛ͯΔख๏ (2009࣌) ԤถͰओྲྀʹͳΓͭͭ͋ΔΜ͡Όͳ͍͔
Μ͡Ό ͬͯΈ·͔͢ʁ
✖࡞ۀɹ˕ϑΟʔνϟ ࡞ۀͰͳ͘ϑΟʔνϟͰݟੵΔ Ϣʔβ͔ΒݟͨͰ͖Δ͜ͱʹϑΟʔνϟ ֤ϑΟʔνϟͳΔ͘ಠཱ͢ΔΑ͏ʹఆٛ͢Δ
࡞ۀݟੵΓԆΛੜΉ ࡞ۀ։ൃऀ߹ͷ۠Ͱɺސ٬ຬͱ ؔ࿈͠ͳ͍ લ࡞ۀͷԆͦͷ··ؔ࿈͢Δޙ࡞ۀʹ Өڹͯ͠͠·͏ ਓ࡞ۀʹ༩͑ΒΕͨ࣌ؒΛશ͓ͯ͏ͱ ͢Δ(ύʔΩϯιϯͷ๏ଇ)
ετʔϦʔϙΠϯτ 41 ϑΟʔνϟΛͻͱ௨Γྻڍ͢Δ ࡞ۀྔ͕தؒҐͷͷʹ5pt͚ɺج४ͱ͢Δ ֤ϑΟʔνϟʹ1ʙ10ptΛׂΓͯΔ(1ɺ2ɺ 3ɺ5ɺ8ͷΈ͏ࣄ͕ଟ͍)
ԿͰ41͏ͷʁ ਓ૬ରධՁ݁ߏಘҙ ഒ·ͰͷنͳΒͦΕ΄ͲؒҧΘͣʹݟ ੵΓͰ͖Δ ϚοΫߦͬͯϙςτΛάϥϜͰจ͠ͳ͍ͷ ͱಉ͡Πϝʔδ (SɺMɺLαΠζͰࣄΓΔ)
ϕϩγςΟ Ұఆظؒʹ͜ͳͨ͠ϑΟʔνϟͷSPΛ߹ܭ͢Δ ࣍ͷظ͍͍ؒͩͨಉ͚ͩ͡ͷSPΛ͜ͳ͢͜ͱ͕ Ͱ͖Δͣ ճܭଌ͢Εɺ͞Βʹਫ਼্͕͕Δ
ݪཧ͜Ε͚ͩ
͏গ͠ৄ͘͠ʁ
ϑΟʔνϟͯԿʁ ސ٬ʹͱͬͯιϑτΣΞͷՁͱͳΔͷ 1͋ͨΓͷ࠷େॲཧೳྗɺγϣοϐϯάαΠ τͰʮཉ͍͠ΛจͰ͖Δ͜ͱʯ ϑΟʔνϟʺػೳ ϓϦϯλͷϑϧΧϥʔҹϑΟʔνϟ͕ͩɺ ΠϯΫΛరͰ͖Δ͜ͱͨͩͷػೳ
ϑΟʔνϟͷ༏ઌॱҐ ސ٬ͷ༏ઌॱҐʹ४ڌ͢Δ ։ൃԆ༧ࢉมߋ͕͋ͬͯɺ༏ઌॱҐʹैͬ ͯ։ൃ͍ͯ͠ΕίΞػೳຬͨͨ͠ιϑτΣ ΞΛఏڙͰ͖Δ େࣄͳͷސ٬ͷຬɺզʑͷ߹Ͱͳ͍
ϓϥϯχϯάϙʔΧʔ νʔϜͰݟੵΓ͢Δํ๏ ϑΟʔνϟຖʹɺ֤ϝϯόʔ41ͷॻ͔Εͨ ΧʔυΛʹग़͢(Ұ੪ʹ) ҟͳΔpt͕ग़ͨ߹ɺ֘ऀͰ͠߹͏ ࠶ΧʔυΛʹग़͠ɺpt͕߹ҙ͞ΕΔ·Ͱଓ͘
ϓϥϯχϯάϙʔΧʔͷ؊ ϝϯόʔશһ͕ݟੵΓʹೲಘ͢Δ͜ͱ͕େࣄ ͋͘·ͰݟੵΓɺࢮक͖͢ͷͰͳ͍
࣮ࡍʹͬͯΈΑ͏ ϥϒϥυʔϧɾϨτϦʔόʔ ςϦΞ άϨʔτɾσʔϯ ϓʔυϧ μοΫεϑϯτ δϟʔϚϯɾγΣύʔυ ηϯτόʔφʔυ ϒϧυοά ݞͷߴ͞(υοάϙΠϯτ)ΛݟੵΖ͏
ߟ͑ͯΈΑ͏ େ·͔Ͱ͍͍ (ςϦΞ࣮େ͖͞όϥόϥʹ ༷͕ᐆດͳ͜ͱͷྑ͍ϝλϑΝʔ) ΞϑϦΧκͱ͔ΩϦϯ͏·͘ݟੵΕΔʁ (ਓͷ૬ରతͳײ͍͍֮ͤͥ10ഒ·Ͱ) ࠓ͙͢ͷϑΟʔνϟͰͳ͚Εɺ10100Χʔ υʹࠞͥͯྑ͍
̏ͭͷݟੵΓΛ͢Δ ϦϦʔεݟੵΓ ΠςϨʔγϣϯݟੵΓ ࠓͷݟੵΓ
ΠςϨʔγϣϯ ϕϩγςΟΛܭࢉ͢Δظؒ ͍͍ͩͨि͔ؒिؒΛ࠾༻͢Δ͜ͱ͕ଟ͍ ։࢝ຖʹͲͷϑΟʔνϟ(͋Δ͍ͦͷҰ෦)Λ࣮ ͢Δ͔ܾΊΔ ऴྃ࣌ʹʮಈ͘ʯ͕Ͱ͖͍ͯΔ͜ͱ
ϦϦʔε ιϑτΣΞΛ࣮ࡍʹͬͯΒ͏͜ͱ ϦϦʔεͨ͠ΒऴΘΓͰͳ͘ɺϑΟʔυόοΫ Λಘͯվળͨ͠Γ͢Δ ΠςϨʔγϣϯͰߏ͞ΕΔ
ࠓ ϑΟʔνϟΛ࣮ݱ͢ΔͨΊͷλεΫΛׂΓৼΔ ຖேελϯυΞοϓϛʔςΟϯάͰਐΛ֬ೝ ͢Δͱྑ͍ λεΫͷಉ࣌ॲཧਓͭ·Ͱ͕ྑ͍
)BQQZ1MBOOJOH
ࢀߟਤॻ ΞδϟΠϧͳݟੵΓͱܭըͮ͘ΓɹʙՁ ͋ΔιϑτΣΞΛҭͯΔ֓೦ͱٕ๏ʙ (Mike Cohnஶ ϚΠφϏ 2009)
࣭ʁ