I noticed that most requirements are similar, there is a correspondence between ISO 2008 version sections/ paragraph and 2015 ones, however they are numbered completely different.
Would we have to change the numbers of all our Procedures/ Forms in order to correspond to the paragraphs of the new standard version, or it would be sufficient to create a correspondence chart, as an easy way to retrieve a required document for compliance? I understand that the re-certification audit will be done according to the new standard version.
The best way to approach the transition is to first identify the requirements of the new version that you already met with your documentation and processes and than to start adapting your processes and documents to the new version of the standard.
Most of the requirements are similar, but the clause numbers are c hanged and some new requirements are added. As far as procedures/forms numbers are concerned, you don't have to change it sine the standard does not prescribe how your going to label your documents and numbering system. You only need to change the reference to clauses inside the procedures so they are aligned with the new version and new clause numbers.
The re-certification can be done according to the new version but only if you choose to. You can do it according to the previous version of the standard until September 2018.