JP2002351538A - Method for managing manufacturing process - Google Patents
Method for managing manufacturing processInfo
- Publication number
- JP2002351538A JP2002351538A JP2001155488A JP2001155488A JP2002351538A JP 2002351538 A JP2002351538 A JP 2002351538A JP 2001155488 A JP2001155488 A JP 2001155488A JP 2001155488 A JP2001155488 A JP 2001155488A JP 2002351538 A JP2002351538 A JP 2002351538A
- Authority
- JP
- Japan
- Prior art keywords
- manufacturing process
- failure
- management
- fault tree
- cause
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000001364 causal effect Effects 0.000 claims description 6
- 230000004931 aggregating effect Effects 0.000 claims 1
- 230000010485 coping Effects 0.000 abstract 1
- 238000007726 management method Methods 0.000 description 43
- 238000003466 welding Methods 0.000 description 19
- 230000007547 defect Effects 0.000 description 5
- 230000003584 silencer Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
Landscapes
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
- General Factory Administration (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、製造工程について
の管理方法に関する。[0001] The present invention relates to a management method for a manufacturing process.
【０００２】[0002]
【従来の技術】要素（現象）間の因果関係を多分枝構造
（フォールトツリーＦＴ：Fault Tree）で表してシステ
ムの故障の原因究明を速やかに行うフォールトツリー分
析ＦＴＡ（：Fault Tree Analysis）という手法があ
り、このＦＴＡを利用した例が特開２０００−１５５７
００公報等種々提案されている。2. Description of the Related Art A method called a fault tree analysis (FTA) for expressing a causal relationship between elements (phenomena) with a multi-branch structure (fault tree FT: Fault Tree) to quickly investigate the cause of a system failure. An example using this FTA is disclosed in JP-A-2000-1557.
Various publications have been proposed.
【０００３】前記いずれの公報に記載されたものも、発
生してはならない故障現象をトップ事象として、トップ
事象と因果関係を有する設計上の要因を多分枝に構成し
てフォールトツリーＦＴを構築している。したがって設
計上の要因で生じた故障については、原因究明が容易に
行われ、設計上の管理も効率良く行うことができる。In any of the publications described above, a fault phenomenon that should not occur is defined as a top event, and a design factor having a causal relationship with the top event is configured in multiple branches to construct a fault tree FT. ing. Therefore, for a failure caused by a design factor, the cause can be easily investigated, and design management can be performed efficiently.
【０００４】[0004]
【発明が解決しようとする課題】しかし製造品質に影響
を及ぼす製造工程における要因で生じる故障について
は、真の原因を究明することはできず、製造工程の管理
にも利用することができない。However, a failure caused by a factor in the manufacturing process that affects the manufacturing quality cannot be determined for its true cause and cannot be used for managing the manufacturing process.
【０００５】本発明は斯かる点に鑑みなされたもので、
その目的とする処は、製造工程の管理が要領良く効率的
に行える製造工程の管理方法を供する点にある。[0005] The present invention has been made in view of such a point,
An object of the present invention is to provide a method of managing a manufacturing process in which the management of the manufacturing process can be effectively and efficiently performed.
【０００６】[0006]
【課題を解決するための手段及び作用効果】上記目的を
達成するために、本請求項１記載の発明は、故障現象を
トップ事象として製造工程の要因を分析し因果関係を基
本原因に関連させて多分枝に構成し、各基本原因に対処
する管理項目をそれぞれ端末として付加した工程フォー
ルトツリーを作成し、前記工程フォールトツリーに基づ
いて製造工程を管理する製造工程の管理方法とした。In order to achieve the above object, the invention according to the first aspect of the present invention analyzes a factor in a manufacturing process with a failure phenomenon as a top event and associates a causal relationship with a basic cause. A process fault tree is formed in which the process items are multi-branched, and management items for dealing with each basic cause are added as terminals, and a manufacturing process management method for managing a manufacturing process based on the process fault tree.
【０００７】故障現象をトップ事象として製造工程の要
因を分析し因果関係を基本原因に関連させて多分枝に構
成し、各基本原因に対処する管理項目をそれぞれ端末と
して付加した工程フォールトツリーを作成するので、該
工程フォールトツリーに基づき製造工程におけるミスに
よる故障の真の原因が速やかになされるとともに、製造
工程の管理を要領良く効率的に行うことができる。Analyzing the factors of the manufacturing process with the failure phenomenon as the top event, creating a process fault tree in which the causal relationship is related to the basic cause and configured in multiple branches, and management items for dealing with each basic cause are added as terminals respectively Therefore, based on the process fault tree, the true cause of a failure due to a mistake in the manufacturing process can be promptly made, and the manufacturing process can be managed effectively and efficiently.
【０００８】請求項２記載の発明は、請求項１記載の製
造工程の管理方法において、過去の故障の現象，該故障
の原因および該故障原因の発生頻度等のデータを集計
し、前記集計したデータを前記工程フォールトツリーの
各要素に対応させてデータベースを構築することを特徴
とする。According to a second aspect of the present invention, in the method of managing a manufacturing process according to the first aspect, data such as past failure phenomena, causes of the failures, and frequency of occurrence of the failure causes are aggregated, and the aggregated data is collected. A database is constructed by associating data with each element of the process fault tree.
【０００９】故障原因の発生頻度等の集計したデータを
工程フォールトツリーの各要素に対応させてデータベー
スを構築することにより、製造工程の管理上重要な項目
を容易に選定して効率良く管理することができる。[0009] By constructing a database by associating the aggregated data such as the frequency of occurrence of failure causes with each element of the process fault tree, it is possible to easily select important items in the management of the manufacturing process and manage them efficiently. Can be.
【００１０】請求項３記載の発明は、請求項２記載の製
造工程の管理方法において、前記データベースのデータ
は適宜更新されることを特徴とする。According to a third aspect of the present invention, in the manufacturing process management method according to the second aspect, the data of the database is updated as appropriate.
【００１１】故障があった場合の新たな故障の現象，原
因および発生頻度等のデータを追加して集計しデータベ
ースを適宜更新しておくことにより、製造工程を管理す
るときに参照するデータベースの信頼性を向上させるこ
とができる。When a failure occurs, data such as a new failure phenomenon, cause, and occurrence frequency is added and tabulated, and the database is updated as appropriate. Performance can be improved.
【００１２】[0012]
【発明の実施の形態】以下本発明に係る一実施の形態に
ついて図１および図２に基づき説明する。本実施の形態
は、車両の部品についての製造工程の管理方法に係る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to FIGS. The present embodiment relates to a method of managing a manufacturing process for vehicle components.
【００１３】本製造工程の管理方法の概略構成図を図１
に示す。各部品ごとに故障現象をもとに製造工程上の要
因を分析する（ステップ）。一方各部品ごとの故障の
データを集計する（ステップ）。故障の報告があった
ときは、その故障の現象はもとより、その故障の原因等
を逐次集計し、その故障原因の発生頻度などを算出して
おく。FIG. 1 is a schematic diagram showing the configuration of a method for managing the present manufacturing process.
Shown in Factors in the manufacturing process are analyzed for each component based on the failure phenomenon (step). On the other hand, the failure data for each part is totaled (step). When a failure is reported, the cause of the failure as well as the phenomenon of the failure are sequentially tabulated, and the frequency of occurrence of the failure cause is calculated.
【００１４】そして種々の故障現象をトップ事象として
分析した要因の因果関係を多分枝に構成して端末の基本
事象（原因）に関連させたフォールトツリー（工程Ｆ
Ｔ）を作成しデータベース化する（ステップ）。この
工程ＦＴに基づいて製造工程の管理が行われる（ステッ
プ）。A fault tree (process F) in which the causal relationship of the factors analyzed by analyzing various failure phenomena as top events is composed of many branches and related to the basic event (cause) of the terminal.
T) is created and made into a database (step). The manufacturing process is managed based on this process FT (step).
【００１５】上記データベース化した工程ＦＴの一例を
図２に示す。同例は、車両部品のマフラーに関するもの
で、トップ事象の故障現象が排気異音10とサイレンサー
脱落20についての工程ＦＴを示したものである。なおマ
フラーについては、その他にも故障現象がある。FIG. 2 shows an example of the process FT in the database. This example relates to a muffler of a vehicle part, and shows a process FT in which a failure phenomenon of a top event is an exhaust noise 10 and a silencer drop 20. The muffler also has other failure phenomena.
【００１６】排気異音10は消音不十分ということで製造
工程上の要因としては圧漏れ11が考えられ、その他仕様
不良があるが、今回の工程ＦＴでは仕様不良のような設
計上のミスなどは除いて製造工程における要因に限定し
ている。Since the abnormal noise 10 is insufficiently silenced, pressure leakage 11 is considered as a factor in the manufacturing process, and there are other specification defects. However, in this process FT, there is a design error such as a specification defect. Is limited to factors in the manufacturing process.
【００１７】さらに圧漏れ11の製造工程上の要因として
は、蓋部カールシーム加工不良（ａ １％）、シェル部ス
ポット溶接不良（ａ２％）、内部パイプとセパレータア
ーク溶接不良（ａ３％）、腐蝕による穴明き（ａ
４％）、圧漏れ試験機検知せず（ａ ５％）の５つの要因
がＯＲの関係で考えられる。ここに各要因に付された百
分率（％）は、故障データを集計した結果から得られた
発生確率であり、ａ１＋ａ２＋ａ３＋ａ４＋ａ５＝１０
０（％）である。Further, as a factor in the manufacturing process of the pressure leak 11,
Indicates that the lid curl seam processing defect (a 1%), Shell part
Poor pot welding (a2%), Internal pipe and separator
Poor welding (a3%), Holes made by corrosion (a
4%), No pressure leak tester detected (a 5%)
Can be considered in the relationship of OR. Here, the hundreds
The fraction (%) was obtained from the result of summarizing the failure data
The probability of occurrence, a1+ A2+ A3+ A4+ A5= 10
0 (%).
【００１８】蓋部カールシーム加工不良のさらなる要因
は、加工時の圧力不良（ｂ１％）とセット不良（ｂ
２％）のいずれかであり、よってｂ１＋ｂ２＝１００
（％）の関係がある。Further factors of the defective processing of the cover curl seam are a defective pressure during processing (b 1 %) and a defective setting (b
2 %), and b 1 + b 2 = 100
(%).
【００１９】この圧力不良とセット不良が基本事象（原
因）であり、この基本原因に対する対処としての管理項
目を各基本原因に付加している。すなわち圧力不良に対
しては圧力荷重管理が、セット不良に対してはセット治
具管理が工程ＦＴの末端として付加されている。The pressure failure and the set failure are basic events (causes), and management items for dealing with the basic causes are added to each basic cause. That is, pressure load management is added to the pressure failure, and set jig management to the setting failure is added as the end of the process FT.
【００２０】同様にシェル部スポット溶接不良のさらな
る要因は、スポット溶接時の電圧不良（ｃ１％）と電流
不良（ｃ２％）と圧力不良（ｃ３％）のいずれかであ
り、基本原因の電圧不良に対してスポット溶接機の電圧
管理、電流不良に対してスポット溶接機の電流管理、圧
力不良に対しては圧力荷重管理が付加されている。Similarly, further causes of the spot welding failure of the shell are any of a voltage failure (c 1 %), a current failure (c 2 %), and a pressure failure (c 3 %) during spot welding. The voltage management of the spot welding machine is applied to the voltage failure, the current management of the spot welding machine is applied to the current failure, and the pressure load management is added to the pressure failure.
【００２１】内部パイプとセパレータアーク溶接不良の
さらなる要因は、アーク溶接時の電圧不良（ｄ１％）と
電流不良（ｄ２％）のいずれかであり、基本原因の電圧
不良に対してアーク溶接機の電圧管理、電流不良に対し
てアーク溶接機の電流管理が管理項目として付加されて
いる。A further cause of the arc welding failure of the inner pipe and the separator is one of a voltage failure (d 1 %) and a current failure (d 2 %) during arc welding. The current management of the arc welding machine is added as a management item for the voltage management of the machine and the current failure.
【００２２】腐蝕による穴明きのさらなる要因は、材料
選定ミス（ｅ１％）につき、したがってｅ１＝１００
（％）であり、これに対して材料管理が管理項目として
付加されている。A further cause of corrosion pitting is a material selection error (e 1 %), so e 1 = 100
(%), To which material management is added as a management item.
【００２３】圧漏れの要因としての圧漏れ試験機検知せ
ずは、マフラーが圧漏れにより排気異音が生じているの
に圧漏れ試験機が事前にこれを検知できなかった場合で
あり、これのさらなる要因としては、圧漏れ試験機が故
障と作業者の見落とし（ｆ２％）のいずれかが考えられ
る。The reason why the pressure leak tester as a cause of the pressure leak is not detected is that the muffler generates abnormal noise due to the pressure leak but the pressure leak tester cannot detect this in advance. A further factor of this may be either a failure of the pressure leak tester or an oversight of the operator (f 2 %).
【００２４】圧漏れ試験機故障に対しては圧漏れ試験機
の保守管理、作業者見落としに対しては作業標準／教育
が管理項目として付加されている。For a pressure leak tester failure, maintenance and management of the pressure leak tester are added, and for an operator overlook, a work standard / education is added as a management item.
【００２５】トップ事象がサイレンサー脱落20について
も同様に製造工程上の要因を分析して、図２に示すよう
に要因の因果関係を多分枝に構成して端末の基本事象
（原因）に関連させたフォールトツリーを作成する。When the top event is the silencer omission 20, the factors in the manufacturing process are similarly analyzed, and as shown in FIG. Create a fault tree.
【００２６】まずサイレンサー脱落20の要因としてはス
テイ折れ（ｇ１％）とステイ脱落（ｇ２％）があり、一
方のステイ折れはステイ強度不足（ｈ１％）により、ス
テイ強度不足は仕様不良を除くと材料選定ミス（ｉ
１％）により、これに対して材料管理が管理項目として
付加されている。First, the causes of the silencer drop 20 include stay break (g 1 %) and stay drop (g 2 %). One of the stay breaks is due to insufficient stay strength (h 1 %). Material selection error (i
1 %), material management is added as a control item to this.
【００２７】他方のステイ脱落は溶接強度不足（ｊ
１％）と異常荷重（ｊ２％）の要因が考えられ、溶接強
度不足は溶接不良（ｋ１％）により、溶接不良の要因と
しては電圧不良（ｍ１％）と電流不良（ｍ２％）とセッ
ト不良（ｍ３％）があり、基本原因の電圧不良に対して
溶接機の電圧管理、電流不良に対して溶接機の電流管
理、セット不良に対してはセット治具管理が付加されて
いる。[0027] The other stay was dropped due to insufficient welding strength (j
1 %) and abnormal load (j 2 %) are considered. Insufficient welding strength is caused by poor welding (k 1 %), and poor welding is caused by poor voltage (m 1 %) and poor current (m 2 %). ) And set failure (m 3 %). Welder voltage management for the basic cause voltage failure, welding machine current management for current failure, and set jig management for set failure. ing.
【００２８】異常荷重は、ステイ取付け位置不良（ｌ１
％）により、ステイ取付け位置不良はセット不良（ｍ３
％）によるものである。The abnormal load is caused by a bad stay mounting position (l 1
%), The stay mounting position defect is the setting defect (m 3
%).
【００２９】こうして作成された工程ＦＴは、各要因ご
とに発生確率が記載されており、この発生確率は、故障
データの集計において新たに入力される故障データによ
り適宜更新される。通常各要因の発生確率が更新される
が、場合によっては新たな要因が付け加わることがあ
る。In the process FT thus created, the occurrence probability is described for each factor, and the occurrence probability is appropriately updated by newly input fault data in the tabulation of the fault data. Usually, the occurrence probability of each factor is updated, but in some cases, a new factor may be added.
【００３０】この工程ＦＴに記載される発生確率をもと
に重要管理項目を容易に選定することができる。例えば
排気異音10においては、内部パイプとセパレータアーク
溶接不良11のａ ３％が最も高率の発生確率を示し、次い
で圧漏れ試験機検知せず12のａ５（％）が２番目に高率
で他の項目が低い確率にあるとすると、内部パイプとセ
パレータアーク溶接不良11と圧漏れ試験機検知せず12が
重要管理項目として選定される。Based on the occurrence probability described in this step FT,
Important management items can be easily selected. For example
For exhaust noise 10, the internal pipe and separator arc
Poor welding 11a 3% Indicates the highest probability of occurrence, followed by
12a without detecting pressure leak tester5(%) Is the second highest rate
If other items have a low probability of
Parator arc welding failure 11 and pressure leak tester 12 not detected
Selected as an important management item.
【００３１】この重点管理項目に関連して製造条件管理
項目としてアーク溶接機の電圧管理13と電流管理14およ
び圧漏れ試験機の保守管理15と作業標準／教育16が選定
される。In connection with this important management item, the voltage management 13 and current management 14 of the arc welding machine, the maintenance management 15 of the pressure leak tester, and the work standard / education 16 are selected as the manufacturing condition management items.
【００３２】またサイレンサー脱落20においては、ステ
イ脱落21のみが高率の発生確率ｇ２（％）を示し、重要
管理項目として選定され、これに関連して溶接機の電圧
管理22，電流管理23，セット治具管理24が製造条件管理
項目として選定される。In the silencer drop 20, only the stay drop 21 has a high probability of occurrence g 2 (%) and is selected as an important control item. In connection with this, the voltage control 22 and the current control 23 of the welding machine are related. , Set jig management 24 is selected as a manufacturing condition management item.
【００３３】図２に示すように工程ＦＴにおいて重要管
理項目と製造条件管理項目が見つけ易いように表示方法
を変えるか特別の印を付するかしておくことができる。
したがって品質担当者は、必ずしも熟練者でなくともデ
ータベースから必要な工程ＦＴを抽出表示すれば製造工
程上の重要管理項目を容易に認知でき、容易に選定され
る製造条件管理項目に従って要領良く効率的に製造工程
の管理を行うことができる。As shown in FIG. 2, in the process FT, the display method can be changed or a special mark can be added so that important control items and manufacturing condition control items can be easily found.
Therefore, the quality person in charge can easily recognize important control items in the manufacturing process by extracting and displaying the necessary process FT from the database even if he is not a skilled person, and efficiently and efficiently according to the easily selected manufacturing condition management items. The production process can be controlled in a short time.
【００３４】データベースは適宜更新され高い信頼性を
維持するようにしているので、このデータベースに基づ
き常に製造工程の管理を適切に行うことができる。この
工程ＦＴを用いることにより、僅かな教育研修で新人や
他部門からの配転者への引継ぎが容易になされる。Since the database is updated as appropriate to maintain high reliability, the manufacturing process can always be appropriately managed based on this database. By using this process FT, handover to a transferee from a new employee or another department can be easily made with a small amount of training.
【００３５】また新規部品を開発した場合には、品質担
当者は現行部品との変更点を考慮して前記工程ＦＴから
重要管理項目および製造条件管理項目を容易に選定する
ことができる。Further, when a new part is developed, the person in charge of quality can easily select important control items and manufacturing condition management items from the process FT in consideration of changes from the current part.
【００３６】例えばマフラーの新規品が軽量化のため材
料を変更したような場合は、腐蝕による穴明きが重要管
理項目として選定され、その材料管理が製造条件管理項
目として選定されることになる。For example, when the material of a new muffler is changed to reduce the weight, the perforation due to corrosion is selected as an important control item, and the material management is selected as a manufacturing condition control item. .
【００３７】車両製造メーカーが部品メーカーに部品を
発注するような場合に、実際に部品を製造するのは部品
メーカーであるが、発注元である車両製造メーカー側の
品質担当者は新規部品の導入時には部品製造現場で品質
検証を行う必要があり、作成した工程ＦＴをもとにして
製造工程の検証を効率良く行うことができ、また重要管
理ポイントを押え要領を得た指導を行うことができる。When a vehicle manufacturer places an order for parts with a parts manufacturer, the parts manufacturer actually manufactures the parts. However, a quality person in charge of the ordering vehicle manufacturer side introduces new parts. Sometimes it is necessary to perform quality verification at the parts manufacturing site, and it is possible to efficiently verify the manufacturing process based on the created process FT, and to provide important guidance and guidance based on important management points. .
【図１】本発明の一実施の形態に係る製造工程の管理方
法の概略構成図である。FIG. 1 is a schematic configuration diagram of a manufacturing process management method according to an embodiment of the present invention.
【図２】工程ＦＴの一例を示す図である。FIG. 2 is a diagram illustrating an example of a process FT.
10…排気異音、11…内部パイプとセパレータアーク溶接
不良、12…圧漏れ試験機検知せず、13…電圧管理、14…
電流管理14、15…圧漏れ試験機の保守管理、16…作業標
準／教育、20…サイレンサー脱落、21…ステイ脱落、22
…電圧管理、23…電流管理、24…セット治具管理。10… Exhaust noise, 11… Insufficient arc welding of internal pipe and separator, 12… No pressure leak tester detected, 13… Voltage control, 14…
Current management 14, 15… Maintenance of pressure leak tester, 16… Work standard / education, 20… Silencer dropped off, 21… Stay dropped, 22
... voltage management, 23 ... current management, 24 ... set jig management.
Claims (3)
要因を分析し因果関係を基本原因に関連させて多分枝に
構成し、各基本原因に対処する管理項目をそれぞれ端末
として付加した工程フォールトツリーを作成し、 前記工程フォールトツリーに基づいて製造工程を管理す
ることを特徴とする製造工程の管理方法。1. A process fault tree in which a factor of a manufacturing process is analyzed with a failure phenomenon as a top event, a causal relationship is related to a basic cause, and the branch is configured in multiple branches, and management items for dealing with each basic cause are added as terminals. And managing the manufacturing process based on the process fault tree.
該故障原因の発生頻度等のデータを集計し、 前記集計したデータを前記工程フォールトツリーの各要
素に対応させてデータベースを構築することを特徴とす
る請求項１記載の製造工程の管理方法。2. Aggregating data such as past failure phenomena, causes of the failures, and occurrence frequencies of the failure causes, and constructing a database in which the aggregated data corresponds to each element of the process fault tree. The method according to claim 1, wherein:
れることを特徴とする請求項２記載の製造工程の管理方
法。3. The method according to claim 2, wherein the data in the database is updated as needed.
Priority Applications (1)
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|---|---|---|---|
| JP2001155488A JP2002351538A (en) | 2001-05-24 | 2001-05-24 | Method for managing manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001155488A JP2002351538A (en) | 2001-05-24 | 2001-05-24 | Method for managing manufacturing process |
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| Publication Number | Publication Date |
|---|---|
| JP2002351538A true JP2002351538A (en) | 2002-12-06 |
Family
ID=18999667
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001155488A Pending JP2002351538A (en) | 2001-05-24 | 2001-05-24 | Method for managing manufacturing process |
Country Status (1)
| Country | Link |
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| JP (1) | JP2002351538A (en) |
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| JP2008517386A (en) * | 2004-10-15 | 2008-05-22 | イーティーエーエス・インコーポレーテッド | Anomaly detection method and system |
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