Cleanroom validation and periodic Re-Certification/Re-Qualification testing in accordance with the ISO 14644 series and Eudralex, Volume 4, Annex 1. Periodic testing is important to ensure continued compliance to relevant standards and will ensure that the product manufactured is fit for its intended use. Testing is carried out at regular intervals as laid down in the ISO 14644 series which guarantees the protection of people, processes and product.