The SO 9000 standard series was prepared as an International Standard in 1987 by the International Organization for Standardization (ISO) and revised in 1994, 2000 and 2008. The 2015 revision, which was completed with the principle of reviewing the standards every five years and revising them according to the conditions of the day, entered into force.

The main reason for the ISO 9001:2015 revision is to enable organisations to add value to their activities and to continuously improve performance. Based on the principles of customer orientation, leadership, employee participation, process approach, improvement, evidence-based decision-making and relationship management, ISO 9001:2015 Quality Management System Standard defines the requirements for customer satisfaction and meeting applicable legal requirements.

The main features of the standard are to monitor customer satisfaction, to create a structure that gives importance to implementation and performance rather than documentation, to support the general management system principles and to facilitate the integration of management systems (in this context, a common high level structure has been created for all management systems), to think risk-based, to take the process approach as a basis, to determine measurable, measurable quality targets at each unit and level, and to ensure that quality planning is carried out to ensure continuous improvement to achieve quality targets. The standard can be applied to all product categories, all sectors and organisations of all sizes and includes a terminology that can be more easily applied by the service sector.