Quality System
Quality System & Standards
The standards, traceability and management arrangements that govern the work described on this site.
Overview
Calibration and verification work performed for Chicago CMM Calibration and Repair is placed with laboratories holding accreditation to ISO/IEC 17025:2017, and any accreditation referenced belongs to the laboratory performing the measurement. This page describes how a job is scoped, how results are documented, and how records are retained.
Standards Referenced
Work described on this site is performed under ISO/IEC 17025:2017.
Where accreditation appears on this site it refers to the performing laboratory's own accreditation, limited to the measurements in its published scope. Requests that fall outside that scope are accepted where the capability exists, reported as non-accredited, and identified as such on the certificate. Every accreditation named here belongs to the laboratory performing the measurement.
Metrological Traceability
Each request is checked against the performing laboratory's published scope of accreditation before acceptance, confirming the instrument, range and required uncertainty are covered. Accredited and non-accredited items are identified separately on the quotation and again on the resulting certificate, so neither is presented as the other. Measurements are traceable to the SI through NIST, and the chain of comparisons and stated uncertainties is documented directly on the certificate. Where a statement of conformity is requested, the decision rule applied is stated on the certificate, consistent with ISO/IEC 17025:2017.
Each measurement carries its own traceability record rather than a blanket statement: the certificate identifies the reference used, that reference's calibration status, and the documented chain linking it to the SI unit. If a reference is later found out of tolerance, everything measured against it since its last calibration is reviewed and the affected customers are told.
Equipment and Maintenance
Equipment supported includes bridge, gantry and cantilever coordinate measuring machines, portable articulated arms, granite surface plates, gauge blocks, and ring and plug gauges. Certificates state the reference standards used, environmental conditions where they affect validity, and results with reported uncertainty. Where adjustment or repair is performed, both before and after results are recorded. Out-of-tolerance findings are reported before adjustment, with as-found data preserved to support a reverse-traceability impact assessment. Records are retained and can be retrieved on request to support an audit or customer inquiry.
References are uniquely identified, environmentally controlled, and recalibrated to a defined schedule that drift data can shorten but not quietly extend. Damaged, overloaded or questionable equipment is removed from service and labelled until it has been verified and formally released back into use.
Management System
The work sits inside a documented management system:
- 01
Controlled documents
Procedures carry issue and revision status.
- 02
Retained records
Retained for a defined period and retrievable against a certificate number.
- 03
Audit and review
Internal audit and management review run on a schedule.
- 04
Corrective action
Nonconforming work and improvement actions are tracked to closure, and their effectiveness is checked afterwards.
Impartiality and Complaints
Where impartiality could be compromised the risk is identified and controlled, and the reported result follows the measurement rather than the commercial interest. Complaints and appeals are a formal input to the system — the process, including the response commitment, is set out on the complaints policy page. How results should and should not be read is covered on the disclaimer page.
Need documentation for an approved-supplier file?
Scope, method statements and traceability detail are supplied with the quotation.