Process model and documentation

Answer:

The ISO 14001 standard requires process-based approach, but it doesn't require organization to describe its processes and write the procedures for them, that is partially a requirement of ISO 9001. In ISO 14001 you demonstrate to process approach by applying the requirements of the standard on your processes. For example, identification and evaluation of environmental aspects should be done process by process and activity by activity, and later when the significant aspects are determined, you will apply the operational controls to appropriate processes, e.g. in sales, design and development,purchasing, production, etc.

For more information, see: Application of the process approach in ISO 14001 implementation https://advisera.com/14001academy/blog/2017/01/30/application-of-the-process-approach-in-iso-14001-implementation/