What to expect from ISO 9001 in supply chains

Just what can purchasers reasonably expect from suppliers who put forward their company's ISO 9001 certification as an argument in favour of their products or services? The International Organization for Standardization (ISO) provides answers to this and related questions in an updated edition of its online brochure, ISO 9001 – What does it mean in the supply chain?

The document is aimed at purchasing managers of business enterprises and public sector officials responsible for procurement, and will also be useful for organisations representing consumer interests – and for consumers themselves.

What is ISO 9001?

ISO 9001 is an international Standard that gives requirements for an organisation's quality management system (QMS). It is part of a family of Standards published by ISO often referred to collectively as the 'ISO 9000 series' or 'ISO 9000 family'. For this reason, you may sometimes hear your suppliers refer to being 'ISO 9000 certified', or having an 'ISO 9000-compliant QMS'. This will normally mean that they are claiming to have a QMS meeting the requirements of ISO 9001, the only Standard in the ISO 9000 family that can be used for the purpose of conformity assessment. It is important to understand, however, that ISO is the body that develops and publishes the Standard – ISO does not 'certify' organisations, as will be explained later in this text.

The latest version of ISO 9001 was published in November 2008, making only minor changes compared with the previous (2000) version. The 2008 revision aims to improve the clarity of existing requirements in ISO 9001:2000, rather than introducing any new requirements. For that reason, ISO 9001:2000 and ISO 9001:2008 can be considered to be equivalent for all practical purposes. ISO 9001:2000 will gradually be replaced by ISO 9001:2008.

The objective of ISO 9001 is to provide a set of requirements that, if effectively implemented, will provide you with confidence that your supplier can consistently provide goods and services that:

  • meet your needs and expectations, and
  • comply with applicable regulations.

The requirements cover a wide range of topics, including your supplier's top management commitment to quality, its customer focus, adequacy of its resources, employee competence, process management (for production, service delivery, and relevant administrative and support processes), quality planning, product design, review of incoming orders, purchasing, monitoring and measurement of its processes and products, calibration of measuring equipment, processes to resolve customer complaints, corrective/preventive actions, and a requirement to drive continual improvement of the QMS. Last but not least, there is a requirement for your supplier to monitor customer perceptions about the quality of the goods and services it provides.

ISO 9001 does not specify requirements for the goods or services you are purchasing. That is up to you to define by making clear your own needs and expectations for the product. You might, for example, refer to product specifications, drawings, national or international product Standards, supplier's catalogues, or other documents as appropriate.

What does 'conformity to ISO 9001' mean?

This means that your supplier has established a systematic approach to quality management and is managing its business to ensure that your needs are clearly understood, agreed, and fulfilled. A statement of conformity to ISO 9001 should not, however, be considered as a substitute for a declaration or statement of product conformity.

How does ISO 9001 help you in selecting a supplier?

ISO 9001 provides some requirements for the purchasing process that include you as the customer. These requirements address the following topics.

  • Requirements for purchasing information that should be provided so that suppliers clearly understand their customers' needs.
  • The ways in which supplied products can be verified as meeting the requirements of the customer.

Note that whenever ISO 9001 refers to 'products', this also includes intangible products like services, or software.

You have an important role to play by specifying to your supplier what you actually want. You may need to consult with your own internal technical staff (the actual users) in this process. If you don't do this, you might find that you receive a product that meets all your stated requirements and the applicable regulatory requirements, but which is absolutely wrong for your intended application. So, first of all, you should concentrate on specifying your needs related to the intended use of the product.

To help in this task you may consider the following.

  • What is the specific product (goods or service) you are buying?
  • What impact does this product have on your own business?
  • What are the risks to your business if you experience problems with this product?
  • How can you be sure that the product you receive will actually meet your requirements?
  • What do you know about the reputation and historical performance of your supplier?
  • What level of confidence do you need in your supplier's ability to provide you with conforming product on a consistent basis?
  • If you decide that conformity to ISO 9001 is important (based on your assessment of the risks associated with the goods and services you are buying) how can you be sure that your supplier does have a QMS that meets ISO 9001 requirements?
  • Are the goods and services you require covered by your supplier's QMS? (You may need to ask for a copy of your supplier's actual certificate or declaration of conformity to find this out!)

How can you have confidence that your supplier meets ISO 9001?

There are various ways in which your supplier can claim that its QMS meets the requirements of ISO 9001.

  • Supplier's declaration of conformity: A declaration by your supplier affirming that its QMS meets ISO 9001 requirements, usually supported by legally binding signatures. This declaration can be based on your supplier's internal audit system, or on second-party or third-party audits.
  • Second-party assessment: Your supplier has been assessed directly by its customer (for example by you, or by another customer, whose reputation you respect) to check if its QMS meets ISO 9001 requirements and your own requirements – sometimes used in contractual 'business-to-business' transactions.
  • Third-party assessment (often referred to as certification or registration): Your supplier hires an impartial third party (a certification body, or 'registrar') to conduct an assessment to verify conformity to ISO 9001 requirements. This third party then issues a certificate to your supplier describing the scope of its QMS, and confirming that it conforms to ISO 9001.

Additional confidence may come from the fact that some certification bodies (registrars) are accredited by nationally or internationally recognised accreditation bodies, who verify the certification body's independence and competence to carry out the certification process. Many accreditation bodies have multi-lateral arrangements under the umbrella of the International Accreditation Forum (IAF) to promote worldwide mutual recognition in support of World Trade Organization (WTO) free-trade principles.

Can suppliers claim that their goods or services meet ISO 9001?

No. The reference to ISO 9001 indicates that the supplier has a QMS that meets the requirements of ISO 9001:2000 or ISO 9001:2008. As mentioned earlier, this should provide you with confidence in your supplier's ability to provide consistent, conforming goods or services. ISO 9001 requires your supplier to monitor the levels of satisfaction of its customers, and to feed back this information in order to improve the effectiveness of its QMS.

What can I do if things go wrong?

If you are not happy with specific goods or services you receive, you should first of all bring this to your supplier's attention via the normal technical and/or commercial communication channels that have been established. Your supplier is obliged to investigate your complaint and should take appropriate actions to avoid or reduce the chances of it happening again.

If, however, you are dissatisfied with the overall performance of your supplier (for example if they continue to provide nonconforming products, do not address your complaints, or are not taking appropriate corrective action), then this is an indication of problems in their QMS. Depending on the responses you receive, you should be aware that you can escalate your complaint via the steps described below.

  1. If your supplier has a QMS that meets ISO 9001 requirements, they must have a nominated person – the management representative with the responsibility and authority to ensure the system is working properly. You should find out who this is, and make a formal complaint.
  2. If you are still not satisfied with the response from your supplier, and if they are certified by an independent (third party) certification body (registrar), you should bring the matter to the certification body's attention. You can find the certification body's name by looking at your supplier's certificate. The certification body will investigate the problems during their surveillance audits of your supplier's QMS, or, in critical cases, may decide to carry out an additional specific investigation.
  3. If you do not receive a satisfactory response from the certification body, and if the body is accredited, you should complain to the relevant accreditation body. Details of any such accreditation will appear on your supplier's ISO 9001 certificate. If you have difficulty in getting this information, you can consult the list of accreditation bodies who are members of the International Accreditation Forum on the IAF website.
  4. If you feel that you have not received a satisfactory response from the accreditation body, and if it is a member of the International Accreditation Forum, you can complain to the IAF through the IAF website.

Remember that none of the above will affect your statutory rights as a purchaser and it may be appropriate to take legal action against your supplier instead of, or in parallel with, the above channels. The way in which you do this may vary from one country to another.


ISO 9001 is a useful basis for organisations to be able to demonstrate that they are managing their business to achieve consistent quality goods and services.

There are several ways in which your suppliers can claim conformity to ISO 9001, and you need to ensure that the method chosen by your supplier provides you with the necessary degree of confidence.

If you are not satisfied with the performance of your supplier, you must provide them with the appropriate feedback. Learning from complaints helps organisations to improve their future performance – that is what ISO 9001 is about.

NOTE: This guidance was originally developed by the ISO 9000 Advisory Group, comprising representatives of ISO Technical Committee 176 (the committee responsible for developing and maintaining the ISO 9000 family of Standards), the ISO Committee on conformity assessment, the ISO Committee on consumer policy, and the International Accreditation Forum. It has been updated to take into consideration the publication of ISO 9001:2008 in November 2008.

(Note – prices subject to change from 1 May 2010)

For information about other Standards in the 'ISO 9001 series' email enquiries@standards.co.nz or call 0800 782 632.

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