There are three main phases. The first is when an industry sector requests the need for a standard. It gets communicated via the national member body to ISO. Once agreed that international standards are required, the technical scope for future standards gets defined by a group consisting of technical experts from countries interested in this project. The second phase is the consensus-building phase, where the countries discuss and negotiate the detailed technical specifications. The third and final phase is the formal approval of the draft international standard. It requires two-thirds approval of ISO members and 75 percent of all the members who vote. Once passed, the agreed text gets published as an ISO standard. Nowadays, interim documents agreed upon during different stages of the standards development process are also published. Most of the standards developed require periodic revision as many factors contribute to its obsolescence. The ISO standards are best- reviewed by factors like technological advancements, new materials, manufacturing methods, quality, and safety requirements. As per ISO, the rule established is that every five years, all ISO standards get reviewed. Depending on circumstances, the standards are revised earlier.



