If you are referring to the changes the laboratory need to make or has made to transition from ISO 17025:2005 to ISO 17025:2017; yes the laboratory should perform a gap assessment, look at the risks of not meeting the requirements, decide on what is required and record actions /changes to take place. The accreditation body would have a guideline and perhaps even a transition checklist for the laboratory to use. This may be requested of you before the assessment. Remember however that in terms of accreditation, transitional changes are requirements, not merely improvements.
I recommend you contact your accreditation body for more information on specific transitional guidelines or requirements