Methodology for developing documentation

Answer:

There is no prescribed methodology for developing documentation, different people have different approaches. The documentation itself is not an only factor for compliance with the standard, it is only a tool for achieving compliance and avoiding nonconformities.

The most important thing is to understand requirements of the standard and develop set of activities and processes to meet those requirements, than you need to document them through procedures in order to avoid nonconfomances. Records and forms are then used to demonstrate that the procedures are being followed.

For more information, see: 7 steps in writing QMS policies and procedures for ISO 9001 https://advisera.com/9001academy/blog/2015/03/10/7-steps-in-writing-qms-policies-and-procedures-for-iso-9001/