How a change is assessed before it takes effect. A change of manufacturing source is treated as a new product rather than a continuation of the old one.
Document control
Document reference
LZ-SOP-QA-04
Revision
3
Effective from
November 18, 2025
Next review due
November 18, 2026
Document owner
Quality Assurance
Covers
Change control
Provisions
A change of source, specification, method or supplier is raised, assessed and approved before it takes effect
A new source receives a new batch identifier, new analysis and a new certificate; the previous certificate is never carried over
A previous purity figure is never reused for material from a different source
Specification changes are recorded against the first batch they applied to
Superseded certificates are retained rather than deleted, so the analytical history stays readable
Scope. This document forms part of the Lyze Labs quality system and applies to
research reference material supplied for in vitro laboratory use. It is not a
marketing authorisation, a regulatory approval, or a claim that material may be used
in humans.
Document control. LZ-SOP-QA-04 is an internal controlled document reference in
the Lyze Labs namespace. It is not an accreditation or certification number issued by
an external body. A superseded revision is archived rather than destroyed, so what was
in force on any given date can be established.