Sign-offs on procedure

One should consider two topics: authority and implementation effectiveness.

ISO 9001:2015 requires that documents belonging to a quality management system have to be approved by an authorized role. Having just a signature evidencing approval by an authorized role is enough. ISO 9001:2015 does not require elaboration and verification signatures.
A good implementation practice, to avoid resistance and/or mistakes, is to ask departmental participation during the development of a procedure.
 

The following material will provide you more information about document control:

- Some tips to make Document Control more useful for your QMS - https://advisera.com/9001academy/blog/2014/05/20/tips-make-document-control-useful-qms/
- How to structure quality management system documentation - https://advisera.com/9001academy/knowledgebase/how-to-structure-quality-management-system-documentation/
- List of mandatory documents required by ISO 9001:2015 - https://advisera.com/9001academy/knowledgebase/list-of-mandatory-documents-required-by-iso-90012015/
- Free online training ISO 9001:2015 Foundations Course - https://advisera.com/training/iso-9001-foundations-course/
- Book - Managing ISO Documentation: A Plain English Guide - https://advisera.com/books/managing-iso-documentation-plain-english-guide/