The ISO/IEC Directives define the basic procedures to be followed in the development of International Standards and other publications.
There are, however, other documents containing guiding principles for standards development, which can also be found below.
Here are the official rules that state how to develop an ISO standard:
Here are some supplementary documents that may help guide the standards development process:
Here is some information about Guides, which provide advice to standards writers and national standards bodies: