{"id":510,"date":"2022-01-26T01:22:09","date_gmt":"2022-01-26T01:22:09","guid":{"rendered":"https:\/\/www.cybermedian.com\/pl\/?p=510"},"modified":"2025-02-17T13:34:24","modified_gmt":"2025-02-17T05:34:24","slug":"fault-tree-analysis-fta-secret-weapon-for-root-cause-analysis","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/pl\/fault-tree-analysis-fta-secret-weapon-for-root-cause-analysis\/","title":{"rendered":"Analiza drzewa b\u0142\u0119d\u00f3w (FTA)\u200a\u2014\u200aTajna bro\u0144 w analizie przyczyn \u017ar\u00f3d\u0142owych"},"content":{"rendered":"

Analiza drzewa b\u0142\u0119d\u00f3w jest jedn\u0105 z najcz\u0119\u015bciej stosowanych metod w analizie niezawodno\u015bci system\u00f3w. Jest to proces projektowania lub poprawy systemu poprzez analiz\u0119 r\u00f3\u017cnych czynnik\u00f3w, kt\u00f3re mog\u0105 prowadzi\u0107 do awarii systemu, w tym sprz\u0119tu, oprogramowania, \u015brodowiska, czynnik\u00f3w ludzkich itp. Rysuj\u0105c drzewo b\u0142\u0119d\u00f3w, mo\u017cemy okre\u015bli\u0107 mo\u017cliwe kombinacje tryb\u00f3w oraz prawdopodobie\u0144stwo przyczyny awarii systemu. Prawdopodobie\u0144stwo awarii systemu jest obliczane, a odpowiednie \u015brodki s\u0105 podejmowane.<\/p>\n

FTA to metoda analizy i oceny projekt\u00f3w maj\u0105ca na celu popraw\u0119 niezawodno\u015bci systemu. Jest cz\u0119sto stosowana w procesie Six Sigma, szczeg\u00f3lnie w fazie analizy procesu poprawy biznesowej Six Sigma.<\/p>\n

Jak przeprowadzi\u0107 analiz\u0119 drzewa b\u0142\u0119d\u00f3w<\/h3>\n

Za\u0142\u00f3\u017cmy, \u017ce masz drzewo analizy awarii systemu baz danych, kt\u00f3re zaczyna si\u0119 od awarii bazy danych i analizuje czynniki, kt\u00f3re mog\u0105 powodowa\u0107 awarie bazy danych i aplikacji.<\/p>\n

Analiza drzewa b\u0142\u0119d\u00f3w to proces wyczerpywania przyczyn awarii. Jest to analiza od g\u00f3ry do do\u0142u, w kt\u00f3rej zaczynamy od objaw\u00f3w, bior\u0105c za przyk\u0142ad sp\u00f3\u017anienie si\u0119 na autobus, a nast\u0119pnie wymieniamy mo\u017cliwe przyczyny w spos\u00f3b hierarchiczny, tworz\u0105c struktur\u0119 drzewa. Struktura drzewa nazw pochodzi z r\u00f3\u017cnych ga\u0142\u0119zi, kt\u00f3re mog\u0105 powodowa\u0107 objawy.<\/p>\n

<\/a><\/figure>\n

Notacja FTA<\/h3>\n

Analiza drzewa b\u0142\u0119d\u00f3w wykorzystuje kilka podstawowych symboli do przedstawienia r\u00f3\u017cnych punkt\u00f3w, przyczyn i skutk\u00f3w w procesie. Istnieje wiele symboli, ale oto kilka podstawowych, kt\u00f3re pomog\u0105 Ci rozpocz\u0105\u0107 projektowanie diagramu drzewa b\u0142\u0119d\u00f3w.<\/p>\n

Symbole s\u0105 u\u017cywane do reprezentowania r\u00f3\u017cnych zdarze\u0144 i opisywania relacji:<\/p>\n

Symbole bram<\/h3>\n
<\/figure>\n

Bramka AND<\/strong>\u200a\u2014\u200areprezentuje warunek, w kt\u00f3rym wszystkie zdarzenia pokazane poni\u017cej bramki (bramka wej\u015bciowa) musz\u0105 by\u0107 obecne, aby zdarzenie pokazane powy\u017cej bramki (zdarzenie wyj\u015bciowe) mog\u0142o wyst\u0105pi\u0107. Oznacza to, \u017ce zdarzenie wyj\u015bciowe wyst\u0105pi tylko wtedy, gdy wszystkie zdarzenia wej\u015bciowe istniej\u0105 jednocze\u015bnie.<\/p>\n

<\/figure>\n

Bramka OR<\/strong>\u200a\u2014\u200areprezentuje sytuacj\u0119, w kt\u00f3rej jakiekolwiek z wydarze\u0144 pokazanych poni\u017cej bramki (bramka wej\u015bciowa) doprowadzi do zdarzenia pokazanego powy\u017cej bramki (zdarzenie wyj\u015bciowe). Zdarzenie wyst\u0105pi, je\u015bli istnieje tylko jedno lub jakiekolwiek po\u0142\u0105czenie zdarze\u0144 wej\u015bciowych.<\/p>\n

Symbole zdarze\u0144<\/h3>\n

Istnieje pi\u0119\u0107 typ\u00f3w symboli zdarze\u0144:<\/p>\n

<\/figure>\n

Prostok\u0105t<\/strong>\u200a\u2014\u200aProstok\u0105t jest g\u0142\u00f3wnym elementem budulcowym drzewa analitycznego. Reprezentuje negatywne zdarzenie i znajduje si\u0119 na szczycie drzewa, a tak\u017ce mo\u017ce by\u0107 umieszczony w ca\u0142ym drzewie, aby wskaza\u0107 inne zdarzenia, kt\u00f3re mog\u0105 by\u0107 dalej rozk\u0142adane. To jedyny symbol, kt\u00f3ry b\u0119dzie mia\u0142 bramk\u0119 logiczn\u0105 i zdarzenia wej\u015bciowe poni\u017cej.<\/p>\n

<\/figure>\n

Ko\u0142o<\/strong>\u200a\u2014\u200aKo\u0142o reprezentuje zdarzenie podstawowe w drzewie. Znajduj\u0105 si\u0119 one na dolnych poziomach drzewa i nie wymagaj\u0105 dalszego rozwoju ani rozk\u0142adu. Nie ma bramek ani zdarze\u0144 poni\u017cej zdarzenia podstawowego.<\/p>\n

<\/figure>\n

Diament<\/strong>\u200a\u2014\u200aDiament identyfikuje niedorozwini\u0119te zdarzenie ko\u0144cowe. Takie zdarzenie nie jest w pe\u0142ni rozwini\u0119te z powodu braku informacji lub znaczenia. Ga\u0142\u0105\u017a drzewa b\u0142\u0119d\u00f3w mo\u017ce ko\u0144czy\u0107 si\u0119 diamentem. Na przyk\u0142ad, wi\u0119kszo\u015b\u0107 projekt\u00f3w wymaga personelu, procedur i sprz\u0119tu. Tw\u00f3rca drzewa mo\u017ce zdecydowa\u0107 si\u0119 skoncentrowa\u0107 na aspekcie personelu procedury, a nie na aspektach sprz\u0119towych czy proceduralnych. W takim przypadku tw\u00f3rca u\u017cy\u0142by diament\u00f3w, aby pokaza\u0107 \u201eprocedury\u201d i \u201esprz\u0119t\u201d jako niedorozwini\u0119te zdarzenia ko\u0144cowe.<\/p>\n

<\/figure>\n

Owal<\/strong>\u200a\u2014\u200aSymbol owalny reprezentuje specjaln\u0105 sytuacj\u0119, kt\u00f3ra mo\u017ce wyst\u0105pi\u0107 tylko wtedy, gdy zajd\u0105 okre\u015blone okoliczno\u015bci. Jest to opisane w symbolu owalnym. Przyk\u0142adem mo\u017ce by\u0107 sytuacja, w kt\u00f3rej prze\u0142\u0105czniki musz\u0105 by\u0107 w\u0142\u0105czane w okre\u015blonej kolejno\u015bci przed podj\u0119ciem dzia\u0142ania.<\/p>\n

<\/figure>\n

Tr\u00f3jk\u0105t<\/strong>\u200a\u2014\u200aTr\u00f3jk\u0105t oznacza przeniesienie ga\u0142\u0119zi drzewa b\u0142\u0119d\u00f3w do innej lokalizacji w obr\u0119bie drzewa. Gdzie tr\u00f3jk\u0105t \u0142\u0105czy si\u0119 z drzewem strza\u0142k\u0105, wszystko, co pokazano poni\u017cej punktu po\u0142\u0105czenia, przenosi si\u0119 do innego obszaru drzewa. Ten obszar jest identyfikowany przez odpowiadaj\u0105cy tr\u00f3jk\u0105t, kt\u00f3ry jest po\u0142\u0105czony z drzewem pionow\u0105 lini\u0105. Litery, liczby lub figury identyfikuj\u0105 jeden zestaw symboli transferowych od drugiego. Aby zachowa\u0107 prostot\u0119 drzewa analitycznego, symbol transferowy powinien by\u0107 u\u017cywany oszcz\u0119dnie.<\/p>\n

Przyk\u0142ad diagramu drzewa b\u0142\u0119d\u00f3w\u200a\u2014\u200a\u015awiat\u0142o nie mo\u017ce si\u0119 w\u0142\u0105czy\u0107<\/h3>\n

Przyjrzyjmy si\u0119 przyk\u0142adzie podstawowej analizy drzewa b\u0142\u0119d\u00f3w: W\u0142\u0105czasz prze\u0142\u0105cznik, aby zapali\u0107 \u015bwiat\u0142o, ale \u015bwiat\u0142o si\u0119 nie w\u0142\u0105cza. Warunkiem b\u0142\u0119du jest \u201eBrak \u015bwiat\u0142a w pokoju\u201d, wi\u0119c to pocz\u0105tek diagramu.<\/p>\n

Nast\u0119pnie, jakie mog\u0105 by\u0107 potencjalne powody, dla kt\u00f3rych \u015bwiat\u0142o si\u0119 nie w\u0142\u0105czy\u0142o?<\/p>\n

<\/figure>\n

Edytuj ten diagram<\/a><\/p>\n

Przyk\u0142ad drzewa b\u0142\u0119d\u00f3w\u200a\u2014\u200aSzablon systemu bez ostrze\u017cenia<\/h3>\n
<\/figure>\n

Edytuj ten diagram<\/a><\/p>\n

Wi\u0119cej przyk\u0142ad\u00f3w FTA<\/p>\n

<\/figure>\n

Przyk\u0142ad drzewa b\u0142\u0119d\u00f3w\u200a\u2014\u200aSp\u00f3\u017aniony autobus<\/a><\/p>\n

<\/figure>\n

System bez ostrze\u017cenia<\/a><\/p>\n

<\/a><\/figure>\n

Brak \u015bwiat\u0142a w pokoju<\/a><\/p>\n

<\/figure>\n

Ilustracja diagramu drzewa b\u0142\u0119d\u00f3w<\/a><\/p>\n

<\/figure>\n

Edukacyjny przyk\u0142ad analizy drzewa b\u0142\u0119d\u00f3w<\/a><\/p>\n

<\/figure>\n

Analiza drzewa b\u0142\u0119d\u00f3w przeszk\u00f3d w rozwoju<\/a><\/p>\n

<\/figure>\n

Analiza drzewa b\u0142\u0119d\u00f3w przep\u0142ywu komponent\u00f3w<\/a><\/p>\n

<\/figure>\n

Przyk\u0142ad analizy drzewa b\u0142\u0119d\u00f3w<\/a><\/p>\n

<\/figure>\n

Analiza drzewa b\u0142\u0119d\u00f3w elektrycznych<\/a><\/p>\n

<\/figure>\n

Analiza drzewa b\u0142\u0119d\u00f3w rur gazowych<\/a><\/p>\n

<\/figure>\n

Przyk\u0142ad analizy drzewa b\u0142\u0119d\u00f3w \u015bredniej wielko\u015bci<\/a><\/p>\n

<\/figure>\n

Przyk\u0142ad analizy drzewa b\u0142\u0119d\u00f3w<\/a><\/p>\n

<\/figure>\n

Podstawowa analiza drzewa b\u0142\u0119d\u00f3w<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Fault tree analysis is one of the most commonly used methods in system reliability analysis. It is a process of system design or improvement by analyzing various factors that may lead to system failure, including hardware, software, environment, human factors, etc. By drawing the fault tree, we can determine the possible combinations of modes and the probability of the cause of the system failure. The failure probability of the system is calculated and the corresponding measures are taken.<\/p>\n","protected":false},"author":1,"featured_media":1610,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","footnotes":""},"categories":[10,13,15],"tags":[52,63,62,53],"class_list":["post-510","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-brainstorming","category-online-diagrams","category-strategic-planning","tag-cn-done","tag-es-done","tag-ja-done","tag-tw-done"],"yoast_head":"\nAnaliza drzewa b\u0142\u0119d\u00f3w (FTA)\u200a\u2014\u200aTajna bro\u0144 w analizie przyczyn \u017ar\u00f3d\u0142owych - Cybermediana<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cybermedian.com\/pl\/fault-tree-analysis-fta-secret-weapon-for-root-cause-analysis\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Analiza drzewa b\u0142\u0119d\u00f3w (FTA)\u200a\u2014\u200aTajna bro\u0144 w analizie przyczyn \u017ar\u00f3d\u0142owych - Cybermediana\" \/>\n<meta property=\"og:description\" content=\"Fault tree analysis is one of the most commonly used methods in system reliability analysis. It is a process of system design or improvement by analyzing various factors that may lead to system failure, including hardware, software, environment, human factors, etc. By drawing the fault tree, we can determine the possible combinations of modes and the probability of the cause of the system failure. 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