Safety-Critical Systems 6Safety and Quality Management and

Certification T 79.5303

Safety Management

Safety Documentation

Quality Management

• Systematic actions to gain quality,which is essential in the life cycle of a safety system.

• Quality Assurance:

- concentrates that manufacture prosess and work are performed correctly.

• Quality Control:

- ensures that product is correct.

ISO 9000Quality Management System

• International Organisation for Standardisation (ISO) created the Quality Management System (QMS) basis already in 1987.

• ISO 9001:1987 Model for quality assurance in design, development, production, installation and servicing.

• ISO 9002:1987 Model for quality assurance in production, installation and servicing.

• ISO 9003:1987 Model for quality assurance in final inspection and test covered only the final inspection of finished product.

ISO 9001

• ISO 9000:2000 combines the three standards 9001, 9002, and 9003 into one, now called 9001.

• Design and development procedures are required only if a company does in fact engage in the creation of new products.

• New version has a goal to improve effectiveness via process performance metrics — numerical measurement of the effectiveness of tasks and activities.

ISO 9001

• A company or organization that has been independently audited and certified to be in conformance with ISO 9001 may publicly state that it is "ISO 9001 certified" or "ISO 9001 registered."

• Certification to an ISO 9000 standard does not guarantee the compliance (and therefore the quality) of end products and services; rather, it certifies that consistent business processes are being applied.

• ISO 9001 is not enough and more strict systems are needed. These are described on norms, which have to be followed according to get system certificated.

ISO 9001 System

• The requirements in ISO 9001 include:• a set of procedures that cover all key processes in the

business• monitoring manufacturing processes to ensure

manufactures are producing quality produce• keeping proper records • checking outgoing product for defects, with appropriate

corrective action where necessary • regularly reviewing individual processes and the quality

system itself for effectiveness.

Certification

• Process to indicate conformance with a standard – checked by an authorised body.

• National Safety Authority, Minister of Transportation

• International institutes and certified /notified bodies in EU

• Follow given guidelines, like DO-178B, IEC 61508 or CENELEC norms.

Example in Avionic systemDO-178B Certification

• DO-178B provides the aviation community with guidelines for developing software for airborne systems and equipment that complies with accepted airworthiness requirements.

• Five software levels (A through E), Level A is the most stringent.

DO-178B Certification

The number of objectives to be satisfied.

In the standard, "with independence" refers to a separation of responsibilities where the person(s) who verify an objective must not be the developers of the item in question.

In some cases, an automated tool may be equivalent to independence.

Commercial Development

• Language and toolset specially designed for high-assurance software:

Spark Ada

Further information

www.praxis-his.com/sparkada