GB/T 17989.2-2020 English PDF

US$779.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 17989.2-2020: Control charts - Part 2: Shewhart control charts
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 17989.2-2020	779	Add to Cart	6 days	Control charts - Part 2: Shewhart control charts	Valid

Similar standards

GB/T 6379.6   GB/T 2828.2   GB/T 8170   GB/T 17989.7   GB/T 17989.8   GB/T 17989.6   

Basic data

Standard ID: GB/T 17989.2-2020 (GB/T17989.2-2020)
Description (Translated English): Control charts - Part 2: Shewhart control charts
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A41
Classification of International Standard: 03.120.30
Word Count Estimation: 42,417
Date of Issue: 2020-03-06
Date of Implementation: 2020-10-01
Older Standard (superseded by this standard): GB/T 4091-2001
Quoted Standard: GB/T 3358.2; GB/T 17989.1; ISO 22514-1; ISO 22514-2; ISO 22514-3; ISO 22514-4; ISO 22514-5; ISO 22514-6; ISO 22514-7; ISO 22514-8
Adopted Standard: ISO 7870-2-2013, MOD
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies guidelines for understanding and applying conventional control charts for statistical process control. This standard only applies to the use of conventional control charts for statistical process control. All supplementary content involved are related to conventional control charts, such as: the use of warning lines, trend patterns and process capability analysis. Other types of control chart methods can be found in GB/T 17989.1 in the relevant description.

GB/T 17989.2-2020: Control charts - Part 2: Shewhart control charts

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Control charts--Part 2. Shewhart control charts ICS 03.120.30 A41 National Standards of People's Republic of China Replaces GB/T 4091-2001 Control Charts Part 2. General Control Chart (ISO 7870-2..2013, MOD) 2020-03-06 release 2020-10-01 implementation State Administration of Market Supervision Published by the National Standardization Administration

Contents

Foreword III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms, definitions and symbols 1 3.1 Terms and definitions 1 3.2 Symbol 1 4 Properties of conventional control charts 2 5 Types of control charts 4 5.1 Overview 4 5.2 Control of process parameter values without a given timing 5.3 Control of process parameter value given in advance Figure 4 5.4 Metering control chart and counting control chart 5 6 Measurement control chart 5 6.1 Overview 5 6.2 Mean X chart and range R chart or mean X chart and standard deviation s chart 6 6.3 Single value X plot and moving range Rm plot 8 6.4 Median X􀮨 Control Chart 8 7 Control procedures and interpretation of metrological control charts 9 7.1 Overview 9 7.2 Collecting preliminary data 9 7.3 Check s (or R) Figure 9 7.4 Elimination can identify the cause and modify the control chart 9 7.5 Check X Figure 10 7.6 Continuous monitoring process 10 8 Inspection patterns for which the fluctuations can pinpoint the cause 10 9 Process control, process capability and process improvement 11 10 count control diagram 12 11 Preliminary preparations for setting up control charts 13 11.1 Selection of key quality characteristics for process control CTQ 13 11.2 Process Analysis 14 11.3 Selection of Reasonable Groups 14 11.4 Subgroup Frequency and Subgroup Size 14 11.5 Collection of Initial Data 14 11.6 Out of Control Action Plans 14 12 Steps to building a control chart 15 12.1 Overview 15 12.2 Determining data collection strategies 16 12.3 Data collection and calculation 16 12.4 Drawing X and R Figure 16 13 Considerations for General Control Charts 16 13.1 Notes 16 13.2 Data Correlation 13.3 3 Sigma's Substitution Principle 18 Appendix A (informative) Notes on the inspection mode for which the cause of fluctuation can be determined 19 Appendix B (informative) Example 20 References 35

Foreword

The plan of GB/T 17989 "Control Chart" is divided into the following 9 parts. --- Part 1. General guidelines; --- Part 2. Conventional control chart; --- Part 3. Acceptance control chart; --- Part 4. Cumulative and control charts; --- Part 5. Special control charts; --- Part 6. Exponentially weighted moving average control chart; --- Part 7. Multiple control charts; --- Part 8. Short cycle and small batch control methods; --- Part 9. Autocorrelation process control chart. This part is the second part of GB/T 17989. This section is drafted in accordance with the rules given in GB/T 1.1-2009. This section replaces GB/T 4091-2001 `` conventional control chart ''. Compared with GB/T 4091-2001, the main technical changes are as follows. --- Added 4 types of inspection modes for which the fluctuation can be identified (see Chapter 8); --- Increased the construction method of the measurement control chart (see Figure 6). --- Modified the symbols and colors in the legend of the conventional control chart (see Figure 7, Figure 8, all the icons in Appendix B). This part uses the redrafting method to modify and adopt ISO 7870-2..2013 "Control Chart Part 2. General Control Chart". Compared with ISO 7870-2..2013, this section has structural changes. --- Adjust the order of Appendix A and Appendix B. The technical differences between this part and ISO 7870-2..2013 and the reasons are as follows. --- Regarding the normative references, this section has made adjustments with technical differences to adapt to China's technical conditions and the situation of adjustment. The situation is reflected in Chapter 2 "Regulatory Reference Documents", and the specific adjustments are as follows. ● Replace ISO 3534-2 with GB/T 3358.2 equivalent to the international standard (see Chapter 3); ● Added reference to GB/T 17989.1 (see 3.1); ● ISO 5479 and ISO 16269-4..2010 have been removed. --- Added the term "subgroup" (see 3.1.1). The following editorial changes have been made in this section. --- Adjusted the order of references. This part was proposed and managed by the National Technical Committee for Standardization of Statistical Methods (SAC/TC21). This section was drafted. Tsinghua University, Eliya (Xiamen) Ecological Development Co., Ltd., Qingdao University, China National Institute of Standardization. The main drafters of this section. Sun Jing, Zhao Jing, Xu Jinfei, Li Lili, Ding Wenxing, Wu Gang. The previous versions of the standards replaced by this section are. --- GB/T 4091-2001.

Introduction

The traditional manufacturing process is aimed at the production process of manufactured products, and performs quality control by detecting the final product and screening out non-conforming products. system. This detection strategy is usually wasteful and uneconomical, because it uses post-mortem detection, at which point the waste has been produced. Instead, once Taking preventive measures from the beginning to effectively prevent waste caused by waste products will be more efficient. This can be done by collecting and analyzing process information Take measures in time to achieve this. In 1924 Walt Amand Shewhart proposed the control chart method, which is a kind of process control based on the principle of statistical significance. Graphic tools. Control chart theory is used to distinguish between two variants. The first is by "accidental causes" (also known as "common causes", "natural causes", "random Cause "," inherent cause "or" uncontrollable cause "). This is because there are many causes that are always present and difficult to distinguish. Brings mutation; each of them is only a small part relative to the entire mutation, and does not have a significant impact. However, all The sum of contributions with these indeterminate random causes is measurable and is assumed to be inherent to the process. Eliminate or correct common causes, possibly Resource allocation decisions are needed to fundamentally change processes and systems. The second variant represents a real change in the process. This change can be attributed to a number of identifiable causes that were not produced Process is inherent, and can be eliminated, at least in theory. These identifiable causes are called "identifiable causes" (also known as special Special, unnatural, systemic, or controllable causes). They can be attributed to a lack of material consistency, broken tools, processes or processes The sequence is incomplete, the performance of the equipment is abnormal, or the environment changes. If process variation only originates from random reasons, the process is said to be in a state of statistical control, or "controlled" for short. Once this level of variation is confirmed Any deviation from this level can be considered as the result of a identifiable cause to be identified and eliminated. Statistical process control is a method of establishing and maintaining a process at an acceptable, stable level with the goal of ensuring that the product and The service meets the required requirements. Its main statistical tool is the control chart, which is a system that represents the current state of the process according to the comparison with the control limit. A graphical method of column observation, information representation and comparison, and the control limit is built taking into account the inherent process variation called process capability Stand up. First of all, the control chart method helps to assess whether the process has reached or continues to be in a state of statistical control. When the process is considered to be When stable and predictable, the ability of the process to meet customer requirements can be further analyzed. Control charts can also be used when process activities continue To provide a continuous record of process output quality characteristics. Control charts can help detect unnatural patterns of data changes caused by repetitive processes And provide a lack of statistically controlled judgment criteria. The use and careful analysis of control charts provides a better understanding of the process and is often identified Come up with valuable improvements. Control Charts Part 2. General Control Chart

1 Scope

This section of GB/T 17989 gives guidelines for understanding and applying conventional control charts for statistical process control. This section applies only to the case of using conventional control charts for statistical process control.All the supplementary content is related to conventional control charts. Relevant, such as. use of cordon, trend patterns, and process capability analysis. Other types of control chart methods can be found in GB/T 17989.1 Find the description in.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 3358.2 Statistics Vocabulary and Symbols Part 2. Applied Statistics (GB/T 3358.2-2009, ISO 3534-2..2006, IDT) GB/T 17989.1 Control Chart Part 1. General Guidelines (GB/T 17989.1-2020, ISO 7870-1..2014, MOD) ISO 22514 (all parts) Statistical method capabilities and performance in process management (Statistical methods in process management-Capabilityandperformance) 3 terms, definitions and symbols 3.1 Terms and definitions The terms and definitions defined in GB/T 3358.2 and GB/T 17989.1 and the following terms apply to this document. 3.1.1 Subgroup Take a set of data from the same process, the resulting grouping data makes the difference within the group as small as possible and the difference between the groups as large as possible. 3.2 Symbols The following symbols apply to this document. n. subgroup size or subgroup sample size, that is, the number of sample observations in the subgroup k. number of subgroups L. lower specification limit LCL. lower control limit U. upper specification limit UCL. upper control limit X. Quality characteristics [Each quality characteristic is expressed as (X1, X2, X3,). Sometimes the symbol Y is used instead of X] X. Subgroup mean ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 17989.2-2020_English be delivered?

Answer: Upon your order, we will start to translate GB/T 17989.2-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 17989.2-2020_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 17989.2-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.