1、UBoTQM02100704 PROCEDURE FOR STATISTICAL PROCESS CONTROLDocument Change NoticeInitiator/ OriginatorNameElla XiangSignatureDateQuality System RepresentativeNameEdwin FloresSignatureDateChange DetailsReason for changeRevise Document No. from UBoT-02-1007 to UBoT-QM02-1007. Type of ChangeInitialXRevise
2、 : Partial / CompleteObsoleteCategory Of ChangeXPermanentTemporary: FromToDCN NO. 11-0191Document ReviewReview UBoT-QM03-3001 PCN SpecYesXNoMajorMinor FMEAReviewYesXNoUpdateYesXNoControl PlanReviewYesXNoUpdateYesXNo FormReviewYesXNoUpdateYesXNoApprovalsNameSignatureDateDirector of EngineeringWyman W
3、angSr. Manufacturing ManagerDarwin ZhangSr. Quality ManagerEdwin FloresDirector of OperationErwin ChanVP of OperationSimon TamForm-QES2-1001-01F DOCUMENT REVISION HISTORYREVDCNREVISION DESCRIPTIONDATEINITIATOR000102030406-006706-026909-000709-006811-0191Initial release.Rewrite add Chinese.Revised to
4、 add the item 11.0 of the OCAP.Revised the item 10.4.5 to add more rules of control chart interpreting.Revise item 7.2.1，add the item of 10.4.4.6 of the control limit renew requirement.Revise Document No. from UBoT-02-1007 to UBoT-QM02-1007.21-Feb-0621-Sep-0713-Jan-0916-Sep-0920-Dec-11P. SanchezTige
5、r TangCharles XuFrank LiuElla Xiang1.0 PURPOSE 目的1.1 This procedure describes the guideline and requirements for implementing the statistical process control (SPC) system.本程序旨在對執行制程統計控制系統的方針及要求給予描述。2.0 SCOPE 范圍2.1 This procedure is applicable across all workgroups in the UBoT organization that are i
6、nvolved in the SPC system.本程序適用於UBoT公司內所有與SPC系統有關的工作。3.0 DEFINITIONS定義(Refer to attachment A.參考附件A)4.0 REFERENCES參考4.1 UBoT-QES1-0001Quality Environment Occupational Health And Safety Manual 品质、环境、职业健康安全手册5.0 RESPONSIBILITY-職責5.1 Management empowers personnel with responsibility, authority, and prov
7、ides ample resources to implement and maintain the SPC system.管理層應授予權力給具有責任和權威的人並提供充足的資源來執行及維護SPC系統。5.2 Engineering identifies the critical process/product characteristics for implementing SPC as means of control and improvement.工程部須界定關鍵制程/產品的特性，以此執行SPC的控制及改善功能。5.3 Operations implements the SPC syst
8、em according to the SPC plan.根據SPC計劃來運作執行SPC系統。5.4 QA periodically reviews and documents the status of the SPC system.QA定期評估和總結報告SPC系統的狀況。6.0 GENERAL REQUIREMENTS總體要求6.1 Strong management commitment is essential in order for SPC to be ingrained across all workgroups in the organization.管理層的鄭重承諾是SPC在
9、整個公司的工作中得以貫徹的基礎。6.2 SPC is applied to control and optimize the process and reduce variability in conjunction with design of experiments, process capability studies, etc.SPC可應用於控制和優化制程，並結合試驗設計，制成能力分析等工具來減少制程的變異。6.3 Use of in-process data in the implementation of SPC provides better control and foreca
10、st of process quality.在SPC的執行中，利用制程中的數據可提供對制程質量更好地 控制及預測。6.4 Relevant personnel are trained, involved, and accountable in the implementation of SPC to control and improve the process.在執行SPC當中，控制改善制程的相關負責人應受到相應的培訓。6.5 SPC is to be applied by suppliers where applicable and appropriate for critical pro
11、cess characteristics in the operations.在操作當中，SPC也可適當地應用於供應商的關鍵制程特性地控制。7.0 SPC COMMITTEESPC委員會7.1 There is a SPC Committee to develop and oversee the implementation of the SPC system.建立SPC委員會來推進及監督SPC系統的執行。7.2 The SPC Committee is composed of management representatives from the following:SPC由以下的管理代表組
12、成7.2.1 Manufacturing制造7.2.2 Engineering. 工程7.2.3 Quality Assurance.品质保证7.3 There is a SPC Facilitator to implement, maintain, and update the SPC system.需用SPC設備來執行、維護及更新SPC系統。8.0 TRAINING培訓8.1 Overall awareness training is provided to management, engineers, and supervisors through the use of seminars
13、 or group meetings.通過研討會或團體會對管理者、工程師、及主管進行全面培訓。8.2 Operator training is carried out prior to and during the introduction of SPC in the relevant work area.操作員的培訓應在相關作業區內的SPC介紹中甚至提前進行。8.3 SPC training includes, but not limited to, the following:SPC培訓包括但不限於以下方面：8.3.1 Definitions, terminology, and philo
14、sophy of SPC.SPC的定義、術語及其意義8.3.2 Basic problem solving.基本問題的解決8.3.3 Concept of control.控制概念8.3.4 Capability analysis.性能分析8.4 SPC training is classified into different levels.SPC訓練歸類不同的等級8.4.1 Level 1 - basic SPC training for operators, inspectors, technicians.等級1：對操作員、檢測員及技術員的SPC初級訓練8.4.2 Level 2 int
15、ermediate SPC training for line leaders, supervisors, engineers.等級2：對領班、主管及工程師的SPC中等訓練8.4.3 Level 3 advanced SPC training for engineers.等級3：對工程師的SPC高等訓練9.0 METHODOLOGY方法9.1 Flowchart the process, Prioritize the critical parameters of each operation, including inputs, outputs, and product requirement
16、s at this stage in the process.制作制程流程圖，區分鑒定每個操作的參數的先後順序，包括制程中本工序的輸入、輸出及其要求。9.1.1 Indicate the following:顯示如下9.1.1.1 Inputs to the operation. Prioritize the critical parameters.工序的輸入。識別關鍵參數的先後順序。9.1.1.2 Each operation. Prioritize the critical parameters.每個工序。識別關鍵參數的先後順序。9.1.1.3 Output of the operatio
17、n. Prioritize the product requirements at this stage in the overall process. 工序的輸出。識別產品在整個制程中關於該工序地要求。9.2 Define the cause and effect relationships for each product requirement identified in 9.1.1.詳細說明9.1.1項中所鑒定的每個產品要求的因果關系。9.2.1 Prioritize the causes for each effect.對每一個原因地影響進行先後排序。9.3 Define the d
18、ata collection points for planned experiments and/or setting up control charts (Form#QM02-1007-01).對於計劃好的試驗以及建立控制圖 (Form#QM02-1007-01)，需對其數據收集點進行定義。 9.3.1 For each data collection point indicate the following:每一個數據收集點需顯示如下方面：9.3.1.1 Subgroup size and sampling plan.組群的大小及取樣計劃9.3.1.2 Method used to co
19、llect data.收集數據所用的方式9.3.1.3 Responsibility.職責9.4 Perform a gauge capability study to validate the measurement system.通過量規能力研究驗證測量系統。9.5 Select and implement the appropriate control system and initiate data collection.選擇執行適當的控制系統及開始數據收集。9.6 Determine if the process is in statistical control.確定此制程是否在統
20、計控制當中。9.7 If the process is not in statistical control, determine and eliminate assignable causes of variation until the process is in statistical control.如制程不在統計控制中，確定並排除應該的變數原因，直到此制程在統計控制中。9.8 Perform a capability study.進行能力分析9.9 If the process is capable, determine the long term stability of the
21、process.如果制程是可行的，確定其長期的穩定性。9.10 If the process is not capable, refine the process through design of experiments, other statistical techniques, or revise the specification. Repeat the capability study.如此制程是不可行的，則通過試驗設計，或其它統計方法，或更新規格書,重復制程能力研究。9.11 If the process is not stable over the long term, dete
22、rmine and eliminate assignable causes. Repeat the capability study.如果此制程在長期內是不穩定的，則確定並排除指定的原因，重復制程能力研究。9.12 Repeat the process for each characteristic.重復制程的每個特性。9.13 Prioritize and select projects for variability reduction by determining common causes of variation and implementing action plans for i
23、mprovement. When changes are made, repeat methodology.通過確定一般的可變系數以及通過改善行動的執行，對可變數的減少進行區分及選擇順序。如有變動，重復此方法。9.14 Track improvement progress.追蹤改善制程。9.15 Establish regularly scheduled meetings for individual areas covering cause/effect relationships, plans for improvement, corrective action, out-of-contr
24、ol situations, etc. Have the operators involved in the meetings. During each meeting, items should be prioritized and actions assigned.針對各個區域創立例會，包含因果關系，改善計劃，糾正措施，失控情形等。相關的操作員參與會議。每個會議上，各條款均應有時間安排及指定措施。 10.0 CONTROL CHARTS控制圖10.1 Control charts are used to do the following:控制圖作如下用途：10.1.1 Focus atte
25、ntion on detecting and monitoring process variation over time.集中注意力去发现及監控制程的随时變化。10.1.2 Distinguish special from common causes of variation, as a guide to local or management action.从變异的随机原因中区别出特殊原因，作為现场或管理行动的指导。10.1.3 Serve as a tool for ongoing control of a process.作為一個工具對制程控制服務。10.1.4 Provide a c
26、ommon language for discussing process performance.為論述制程的性能提供一種常用語言。10.2 Control charts for attributes data involves counting and plotting as discrete events, e.g., lot rejection rate, % downtime, etc.作為連續事件，特征數據的控制圖包括計算和測繪，如每批的不合格率、停工時間的百分比等。10.2.1 Use NP control chart when collecting defective data
27、 and the sample size is constant, usually equal to or more than 50.當收集缺陷數據和樣品大小是常數，一般大於或等於50，用NP控制圖。10.2.2 Use P control chart when collecting defective data and the sample size is variable, usually equal to or more than 50. 當收集缺陷數據和樣品大小是變數，一般大於或等於50，用P控制圖。10.2.3 Use C control chart when collecting
28、defect data and the sample size is constant, usually more than 5. 當收集缺陷數據和樣品大小是常數，一般大於5，用C控制圖。10.2.4 Use U control chart when collecting defect data and the sample size is variable. 當收集缺陷數據和樣品大小是變數，用U控制圖。10.3 Control charts for variables data involves measurement and plotting of data on a continuous
29、 scale, e.g., temperature, dimension, etc.變數的控制圖包括連續的數值的測量和測繪，如溫度，尺寸等。10.3.1 Use X-MR control chart when sample size is 1.當樣品數量為1時用XMR控制圖。10.3.2 Use Xbar-R control chart when the sample size is small, usually 3 to 5.當樣品數量比較小，一般在3到5時，用XbarR控制圖。10.3.3 Use Xbar-S control chart when the sample size is l
30、arge, usually equal to or more than 10.當樣品數量比較大，通常大於等於10時，用XbarS控制圖。10.4 Setting up the control charts.建立控制圖10.4.1 Choose the process to be charted.選擇制程來制圖。10.4.2 Determine the sampling method and plan.確定取樣方式和計劃。10.4.2.1 Obtain samples randomly under the same conditions. 在相同條件下隨意取樣。10.4.2.2 Consider period of sampling hourly, daily, shifts,mont
