BS ISO 2859-4:2020 - Sampling Procedures for Inspection by Attributes

Standard Number: BS ISO 2859-4:2020

Release Date: June 19, 2020

ISBN: 978 0 580 91232 0

Status: Standard

Pages: 28

Overview

The BS ISO 2859-4:2020 is a comprehensive standard that provides detailed procedures for sampling inspection by attributes. This standard is essential for organizations that need to assess declared quality levels effectively. It is a critical tool for quality assurance professionals who are tasked with maintaining high standards in production and service delivery.

Purpose and Application

This standard is designed to help organizations implement effective sampling procedures that ensure the quality of products and services. It provides a structured approach to assessing quality levels, which is crucial for maintaining consistency and reliability in production processes. The procedures outlined in this standard are applicable across various industries, making it a versatile tool for quality management.

Key Features

• Comprehensive Guidelines: The standard offers detailed guidelines for sampling inspection by attributes, ensuring that organizations can implement effective quality control measures.
• Versatile Application: Suitable for a wide range of industries, this standard can be applied to various production and service environments.
• Quality Assurance: By following the procedures outlined in this standard, organizations can ensure that their products and services meet the declared quality levels.
• Structured Approach: The standard provides a structured approach to quality assessment, making it easier for organizations to maintain high standards.

Benefits of Using BS ISO 2859-4:2020

Implementing the BS ISO 2859-4:2020 standard offers numerous benefits to organizations, including:

• Improved Quality Control: By adhering to the procedures outlined in this standard, organizations can enhance their quality control processes, leading to better product and service quality.
• Increased Customer Satisfaction: Consistently meeting declared quality levels helps build trust with customers, leading to increased satisfaction and loyalty.
• Cost Efficiency: Effective quality control reduces the likelihood of defects and rework, resulting in cost savings for the organization.
• Regulatory Compliance: Adopting this standard helps organizations comply with industry regulations and standards, reducing the risk of non-compliance penalties.

Who Should Use This Standard?

The BS ISO 2859-4:2020 standard is ideal for quality assurance professionals, production managers, and anyone involved in quality control processes. It is particularly beneficial for organizations that need to ensure their products and services consistently meet high-quality standards.

Conclusion

In today's competitive market, maintaining high-quality standards is crucial for success. The BS ISO 2859-4:2020 standard provides organizations with the tools they need to implement effective sampling procedures for inspection by attributes. By adopting this standard, organizations can ensure that their products and services meet the declared quality levels, leading to improved customer satisfaction and business success.

With its comprehensive guidelines and versatile application, the BS ISO 2859-4:2020 is an invaluable resource for any organization committed to quality excellence. Whether you are in manufacturing, service delivery, or any other industry, this standard will help you achieve and maintain the highest quality standards.

BS ISO 2859-4:2020

This standard BS ISO 2859-4:2020 Sampling procedures for inspection by attributes is classified in these ICS categories:

• 03.120.30 Application of statistical methods

This document establishes single sampling plans for conformance testing, i.e., for assessing whether the quality level of a relevant audit population (lot, process, inventory, file etc) conforms to a declared value. Sampling plans are provided corresponding to four levels of discriminatory ability. The limiting quality ratio (LQR) (see Clause 4) of each sampling plan is given for reference. For levels I-III, the sampling plans have been devised so as to obtain a risk no more than 5 % of contradicting a correct declared quality level. The risk of failing to contradict an incorrectly declared quality level which is related to the LQR is no more than 10 %. The sample sizes for level 0 are designed in a way that the LQR factors of the sampling plans are compatible with the LQR factors for level I.

In contrast to the procedures in the other parts of the ISO 2859 series, the procedures in this document are not applicable to acceptance assessment of lots. Generally, this document mainly focuses on controlling type I error, which differs from the balancing of the risks in the procedures for acceptance sampling.

This document can be used for various forms of quality inspection in situations where objective evidence of conformity to some declared quality level is to be provided by means of inspection of a sample. The procedures are applicable to entities such as lots, process output, etc. that allow random samples of individual items to be taken from the entity.

The sampling plans provided in this document are applicable, but not limited, to the inspection of a variety of targets such as:

1. end items;

2. components and raw materials;

3. operations;

4. materials in process;

5. supplies in storage;

6. maintenance operations;

7. data or records;

8. administrative procedures;

9. accounting procedures or accounting entries;

10. internal control procedures.

This document considers two types of quality models for discrete items and populations, as follows.

1. The conforming-nonconforming model, where each item is classified as conforming or nonconforming, and where the quality indicator of a population of items is the proportion p of nonconforming items, or, equivalently, the percentage 100  p of nonconforming items.

2. The nonconformities model, where the number of nonconformities is counted on each item, and where the quality indicator of a population of items is the average number  ? of nonconformities found on items in the population, or, equivalently, the percentage 100  ? of nonconformities on items in the population.