Retaining time for records

Answer:
Retention time will depend on several issues once there is no prescribed time in ISO standards:
*Are there legal or regulated issues? For example, do you need to keep evidence that you tested your product before delivery to the customer for as long as a warranty is valid?
* Are there after sale issues? For example, do you need to keep evidence to help you service customers a long time after delivery? Customers can order you parts or inquire you about parts or specifications long after the warranty period. Do your organization intend to serve them?
* Are there contract issues? For example, does a contract with a customer requires keeping certain records/evidence for a certain number of years?
* Are there internal issues? For example, does your organization has learning or improvement challenges that require a certain organizational memory? That may imply keeping certain records for a certain time.

You may find more information about doc ument control in the following links:
- Article - Records management in ISO 27001 and ISO 22301 - https://advisera.com/27001academy/blog/2014/11/24/records-management-in-iso-27001-and-iso-22301/
- New approach to document and record control in ISO 9001:2015 - https://advisera.com/9001academy/blog/2015/06/30/new-approach-to-document-and-record-control-in-iso-90012015/
- Free online ISO 9001:2015 Foundations Course - https://advisera.com/training/iso-9001-foundations-course/
- Book – Managing Documentation: A Plain English Guide - https://advisera.com/books/managing-iso-documentation-plain-english-guide/