Already a subscriber? 
MADCAD.com Free Trial
Sign up for a 3 day free trial to explore the MADCAD.com interface, PLUS access the
2009 International Building Code to see how it all works.
If you like to setup a quick demo, let us know at support@madcad.com
or +1 800.798.9296 and we will be happy to schedule a webinar for you.
Security check
Please login to your personal account to use this feature.
Please login to your authorized staff account to use this feature.
Are you sure you want to empty the cart?
BS ISO 7870-2:2023 Control charts - Shewhart control charts, 2023
- undefined
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions [Go to Page]
- 3.1 General presence
- 3.2 Symbols [Go to Page]
- 3.2.1 For the purposes of this document, the following symbols apply
- 4 Concepts of Shewhart control charts [Go to Page]
- 4.1 Shewhart control chart
- 4.2 Control limits
- 4.3 Process in statistical control
- 4.4 Action limits
- 4.5 Warning limits
- 4.6 Type 1 error
- 4.7 Type 2 error
- 4.8 Process not in control
- 4.9 Phase 1 of statistical process control
- 4.10 Phase 2 of control charts
- 5 Types of control charts [Go to Page]
- 5.1 Types of Shewhart control charts
- 5.2 Control charts where no pre-specified values of process parameters are given
- 5.3 Control charts with respect to given pre-specified values of process parameters
- 5.4 Types of variables and attribute control charts [Go to Page]
- 5.4.1 Variables control charts
- 5.4.2 Attribute control charts
- 6 Variables control charts [Go to Page]
- 6.1 Usefulness of variables control charts
- 6.2 Assumption of normality
- 6.3 Pair of control charts
- 6.4 Average,  chart and range, R chart or average,  chart and standard deviation, s char
- 6.5 Control chart for individuals, X, and moving ranges, Rm
- 6.6 Control charts for medians, 
- 7 Control procedure and interpretation for variables control charts [Go to Page]
- 7.1 Underlying principle
- 7.2 Collect preliminary data
- 7.3 Examine s (or R) chart
- 7.4 Homogenization for s (or R) chart
- 7.5 Homogenization for  chart
- 7.6 Ongoing monitoring of process
- 8 Unnatural pattern and tests for assignable causes of variation [Go to Page]
- 8.1 Natural pattern
- 8.2 Unnatural patterns [Go to Page]
- 8.2.1 General
- 8.2.2 Lack of control in the average chart only
- 8.2.3 Lack of control in the variation chart only
- 8.2.4 Lack of control in both average and variation charts
- 8.2.5 Depiction of unnatural patterns
- 9 Process control, process capability, and process improvement [Go to Page]
- 9.1 Process control
- 9.2 Process capability and improvement
- 10 Attribute control charts [Go to Page]
- 10.1 Attribute data
- 10.2 Distributions
- 10.3 Subgroup size
- 10.4 Control chart for fraction nonconforming (p chart)
- 11 Preliminary considerations before starting a control chart [Go to Page]
- 11.1 Choice of critical to quality (CTQ) characteristics describing the process to control
- 11.2 Analysis of the process
- 11.3 Choice of rational subgroup
- 11.4 Frequency and size of subgroups
- 11.5 Preliminary data collection
- 11.6 Out of control action plan
- 12 Steps in the construction of control charts [Go to Page]
- 12.1 Typical format of a standard control chart form
- 12.2 Determine data collection strategy
- 12.3 Data collection and computation
- 12.4 Plotting  chart and R chart
- 13 Caution with Shewhart control charts [Go to Page]
- 13.1 General caution
- 13.2 Correlated data
- 13.3 Use of alternative rules to the three-σ rule
- Annex A (informative) Illustrative examples
- Annex B (informative) Practical notices on the pattern tests for assignable causes of variation
- Bibliography [Go to Page]
