Riba:
- Ikon bambance hanyoyin hasashen buƙatun (matsakaicin motsi, sassauci mai ma'ana, yanayin yanayi)
- Ikon saita yanayin tsinkaya tare da AI da kimanta daidaito tare da ma'auni kamar MAPE/MAE
- Ikon ketare-binciken fitar da hasashen hasashen tare da mahallin kasuwanci da tasirin ci gaba/lokaci
Hasashen buƙatu shine tushen abin da tsarin samar da kayayyaki, sarrafa kaya da dukkan sassan samar da kayayyaki suka dogara. Hasashen da ba daidai ba yana da tsada duka hanyoyi biyu: ƙima yana haifar da farashi mai ƙima da ɓarna, rashin ƙima yana haifar da asarar tallace-tallace da rashin gamsuwar abokin ciniki. Ƙwararrun ɗan adam na taimakawa a wurare da yawa a cikin tsarin hasashen, daga zabar hanya zuwa fassarar bayanan tarihi da samar da yanayi; Amma ganin hasashen a matsayin "ball crystal ball" shine babban kuskure. A cikin wannan rukunin, za mu rufe hanyoyin hasashen na gargajiya, yadda ake gina su daidai da AI, da yadda ake auna daidaito.
Takaitaccen Taswirar Hanyoyin Hasashen
Ba kowane jerin buƙatu ba ne ke yin irin wannan; Wasu suna lebur, wasu suna da yanayi, wasu na yanayi. Wajibi ne a zabi hanyar bisa ga jerin.
Hanya
Yaushe ya dace?
Hankali
Naive (ƙimar ƙarshe)
Don kwatanta (ma'auni)
Baya bin yanayin/lokaci
matsakaita motsi
A tsaye, jerin hayaniya
Maimaita martani ga yanayin
Ƙarfafa smoothing (SES)
Jeri na tsaye, mai da hankali kan bayanan da ke kusa
Da kyau idan babu Trend
Holt (launi biyu)
Jadawalin zamani
Ba ya kama kakar
Holt-Winters
Trend + yanayi
Yana buƙatar isassun bayanan tarihi
Komawa/ML
Multi-m, inganta tasiri
Hadarin wuce gona da iri
Tukwici: Koyaushe farawa da zato na "rashin hankali". Idan hadadden tsarin ku bai fi zato na butulci ba, bai cancanci ɗaukar sarƙaƙƙiya ba. Naive alama ce ta kyauta don auna daidaito.
Ta Yaya Muke Auna Daidaito? (Ma'auni)
Ba za a iya inganta daidaiton tsinkaya ba tare da auna shi ba. Mafi yawan ma'auni:
- MAE (Ma'anar Cikakkun Kuskure): Matsakaicin cikakkiyar ƙimar kurakuran. Naúrar daidai take da naúrar buƙata.
- RMSE (Kuskuren Ma'anar Maɗaukaki na Tushen): Yana ƙara hukunta manyan kurakurai.
- MAPE (Ma'anar Cikakken Kuskuren Kashi): A cikin kashi; Yana da kyau don kwatanta tsakanin abubuwa, amma gurɓatacce lokacin da buƙata ta kusa da sifili.
- Bias: Matsakaicin kuskure; Yana nuna ko kuna yawan wuce gona da iri.
Ƙananan samfurin lissafi. Bari ainihin buƙatar ta kasance [100, 120, 90], annabta ta kasance [110, 115, 100]:
Kurakurai (ainihin - hasashe): -10, +5, -10 Cikakkun kurakurai: 10, 5, 10 → MAE = 25 / 3 ≈ 8.33 Kurakurai Kashi: 10/100, 5/120, 10/90 = 10%, 4.17.1% + 11.11) / 3 ≈ 8.43% Bias = (-10 + 5 - 10) / 3 = -5 → kima akan matsakaita (hasashen> ainihin)
Rashin son rai (ƙididdigar ragi na gaskiya) yana nuna cewa ƙididdigewa yana ci gaba da ƙima; Wannan yana nufin hauhawar farashin kaya. Ana iya ɓoye irin waɗannan kurakuran jagora a cikin MAPE, don haka ana kallon su tare.
Gina Tsarin Hasashen da AI
Kuna iya amfani da AI mafi inganci a wurare biyu: (1) don duba bayanai da ba da shawarar hanyar da ta dace da ayyukan da za a ɗauka, da (2) don samar da lambar tsinkaya. Don shawarar hanya:
Matsayi: Kai injiniyan masana'antu ƙware ne akan hasashen buƙatu. Aiki: Yi nazarin jerin tallace-tallace na wata-wata a ƙasa kuma ku ba da shawarar hanyar hasashen da ta dace. Yi la'akari ko akwai yanayin yanayi da yanayi, rubuta hujjar ku. Bayanai (a kowane wata, watanni 24 na ƙarshe): {{ ƙimomi}}Ƙarin bayani: Akwai haɓakawa a cikin Disamba, buƙata yana raguwa a cikin watannin bazara. Fitowar da nake so:1. Yi sharhi game da halayen jerin (stable/trending/ seasonal).2. Hanyoyi 2 da aka ba da shawarar da kuma dalilin da ya sa.3. Wane ma'aunin daidaito zan bi?4. Matsalolin da ya kamata in lura da su (fiye da ƙari, tasirin talla) Doka: Kada ku yi alkawarin cikakkiyar daidaito ba tare da ganin bayanan ba.
Rauni Mai Sauƙi / Ƙarfi Mai ƙarfi
Rawanin faɗakarwa:
Nawa zan sayar a wata mai zuwa?
Wannan bai ƙunshi bayanai ko mahallin ba; AI ko dai ya ƙi shi ko ya dawo da lambar da aka yi gaba ɗaya. Irin wannan fitarwa yana da haɗari saboda ya bayyana amintacce.
Ƙarfi mai ƙarfi:
Yi tsinkaya watanni 3 masu zuwa ta amfani da dabaru na Holt-Winters tare da wannan jerin watanni 24. Tsawon yanayi shine 12. Da farko rubuta zato na hanyar, sannan ba da hasashen, sannan ƙididdige MAPE ta hanyar gwadawa watanni 6 na ƙarshe. Yi alama watanni gabatarwa daban. Bayanai: {{...}}
Da sauri na biyu yana tambayar duka tsinkaya da nawa kwarin gwiwa don aminta da wannan tsinkaya (na baya). Wannan yana canza tsinkaya daga “baki” zuwa kayan aiki mai aunawa.
Komawa: Ma'auni na Amincewa a Hasashen
Haƙiƙanin gwajin tsinkaya shine a baya, ba gaba ba. Kuna raba bayanan da kuke da shi gida biyu: gini samfurin (jirgin ƙasa) da gwaji. Kuna gina samfurin tare da yanki na farko, tsinkaya lokaci na gaba, kuma kwatanta shi da gaskiya. Wannan dabarar “riƙewa” tana bayyana ko ƙirar tana aiki da gaske ko a'a.
Shirya tsari mai sauƙi na baya don jerin masu zuwa: ajiye watanni 6 na ƙarshe a matsayin gwaji, horar da hanyoyi daban-daban na 3 (naive, SES, Holt-Winters) tare da sauran bayanan, ƙididdige MAPE da son zuciya ga kowane a lokacin gwajin, da yin tebur kwatanta. Rubuta hanyar nasara da dalili.
Hattara: AI na iya wani lokaci "annabta" sakamakon gwajin baya kuma ya gabatar muku da ginshiƙi da aka shirya; wato yana iya yin lambobi masu kama da hankali ba tare da ƙididdige su ba. Tabbatar sake haifar da sakamakon lambobi tare da lambar (Python/Excel). Samfurin harshe baya yin dogon lissafi da dogaro.
Karamin Case: Yakin Samfurin Zamani
Wani kamfanin rarraba abinci ya koka game da samun yawan kayan kayan masarufi kamar ice cream a kowace shekara a cikin hunturu. Injiniyan masana'antu Elif yana ba da shekaru 3 na bayanan wata-wata ga AI kuma ya tambaye shi don kimanta halayen jerin. AI tana gano yanayin yanayi mai ƙarfi (kololuwar lokacin rani) da ɗan ƙaramin yanayin haɓaka shekara-shekara, Holt-Winters ya nuna. Elif ya haifar da tsinkaya a cikin Python kuma ya sake gwada shi: MAPE shine 14%, amma son rai yana da muni sosai - ƙirar tana yin tsinkaya akai-akai. Lokacin da ya bincika dalilin da ya sa, ya gano cewa ya kuskure lokacin yakin neman zabe a cikin bayanan tarihi a matsayin "na al'ada" kuma ya koyar da ƙirar tushe mai girma. Lokacin da muka cire tasirin yaƙin neman zaɓe kuma sake gina samfurin, ƙiyayya ta ragu kuma ƙimar hunturu ta ragu sosai. Darasi: AI ya ba da shawarar hanyar daidai, amma aikin ɗan adam ne don tsaftace bayanan da fassara son zuciya.
Kuskuren gama gari
- Rashin bin awo: Ƙididdiga kuma ba a taɓa auna daidaito ba. Ba za a iya inganta hasashe ba tare da aunawa ba.
- Kallon MAPE kawai: Yin watsi da son zuciya. Kuskuren jagora (tsari) cikin shiru yana ƙãra kaya.
- Kuskuren lambobin da AI suka yi don ƙididdigewa: Rashin tabbatar da gwajin baya da ƙimar awo tare da lamba.
- Ba tsaftacewa / haɓakawa ba: Kuskuren yaƙin neman zaɓe na lokaci ɗaya a matsayin buƙatu na al'ada da koyar da shi ga ƙirar.
- Overfit: Lokacin da hadadden tsari ya yi daidai a baya amma ba ya aiki mara kyau a nan gaba. Kiyaye samfurin mai sauƙi azaman ma'auni.
A takaice
- Zaɓi hanyar tsinkaya bisa ga halayen jerin (na tsaye, mai tasowa, yanayi); Koyaushe fara da kwatanta kanku da butulci.
- Auna daidaito tare da MAE/RMSE/MAPE, amma kuma saka idanu son rai: kuskuren jagora shine mafi tsada.
- Yi amfani da AI don shawarwarin hanya da tsara lambar; Saita hasashen a matsayin kayan aiki mai aunawa, ba “annabci ba”.
- Gwajin baya shine ainihin gwajin nawa ƙarfin ƙarfin abin ƙira zai iya zama; Tabbatar tabbatar da sakamakon lamba tare da lamba.
- Ayyukan ɗan adam ne don tsaftace bayanan (fita, haɓakawa) da fassara sakamakon; AI ya tsallake waɗannan matakan.
Aikin aikace-aikace
Yi aƙalla jerin buƙatun lokaci na 18-24 (almara na gaske ko na gaske). Da farko, ba da jerin AI kuma tambaye shi don fassara halinsa (yanayin / yanayin yanayi) kuma ya ba da shawarar hanyoyi biyu. Sannan yi amfani da "tsarin baya" mai ƙarfi mai ƙarfi don adana lokutan 6 na ƙarshe azaman gwaji kuma kwatanta aƙalla hanyoyi biyu. Mahimmin mataki: Sake ƙididdige ƙimar MAPE da son kai da AI da kanku suka dawo tare da Excel ko Python kuma kwatanta su da fitowar AI. Idan ka sami lambar da ba ta dace ba, rubuta ta. A ƙarshe, fassara alamar son zuciya: shin samfurin ku yana yin kima ko ƙima, kuma menene wannan yake yi ga kayan ku?