The Scientific Technical Committee on Precision Engineering and Metrology (STC P) held two meetings in 2025, on February 20 and August 22. The February meeting took place in Paris, with 60 members, 8 research affiliates and 11 invited guests in attendance. The August meeting was held in Stockholm, Sweden, and was attended by 65 members, 12 research affiliates and 23 invited guests.
During the February 2025 meeting, STC P reviewed the status of the upcoming keynote papers, previously selected to reflect current manufacturing trends relevant to the committee’s activities. Professors Gao, Lanza, and Mayer reported on the progress of the 2025, 2026, and 2027 keynotes, respectively. A new keynote proposal on Traceability and Measurement Uncertainty Assessment in Machine Tool Coordinate Measurements was proposed by Dr. Mutilba and approved by the committee for the 2028 keynote.
Introduced by Prof. Archenti, Mr. Wolfschläger from RWTH WZL, Aachen, delivered an invited presentation for the focused discussion titled “Towards Trustworthy AI Systems for Advanced Manufacturing – A Metrologist’s Point of View.” He discussed the growing role of artificial intelligence in modern manufacturing and emphasized the importance of trustworthiness, transparency, and reliability in AI-driven systems. Drawing on metrological principles, he highlighted the need for robust data quality, traceability, and uncertainty assessment to ensure that AI solutions can be confidently deployed in industrial environments. The presentation underscored how metrology can contribute to establishing standards and validation methods that support safe and effective AI integration in advanced manufacturing.
There were four short technical presentations followed by short discussions:
1. Confidence-aware photometric stereo: advancing 3D metrology with deep learning by Prof. Guo
2. Dynamic error compensation of high-frequency untransduced motion error in coordinate
measuring machines by Prof. Luo
3. Assessing the impact of ambient thermal variations on Machine Tool Coordinate Measurement
in shop floor environments by Dr. Mutilba
4. Data fusion for inhomogeneous geometric data by Prof. Morse
Dr. Balsamo provided updates on relevant ISO/TC 213 standards, followed by reports on the activities of the Terminology Committee and on recent Novel Topics in Production Engineering.
During the August 2025 meeting, STC P began by expressing its appreciation to Prof. Gao and his co-authors for preparing and presenting the 2025 STC P Keynote paper, “Dimensional Metrology Based on Ultrashort Pulse Laser and Optical Frequency Comb.” Prof. Gao delivered the keynote on August 20th in Stockholm, attracting significant interest from CIRP members.
The committee then reviewed the status of upcoming keynote papers (2026-2028), which had been selected to reflect broader trends in manufacturing shaping STC P’s activities. Three proposals for the 2029 keynote were presented, with a final decision scheduled for the 2026 Paris meeting.
As part of special presentations, Dr. Bosse commemorated the 150th Anniversary of the Metre Convention, reflecting on its historical significance and its lasting impact on global metrology. Following this, and introduced by the STC Chair, Dr. Mateusz Sosin from the High-Precision Alignment Section at CERN, Geneva, delivered an invited presentation for focused discussion titled “Engineering Micrometric Alignment Solutions for the LHC’s Harsh Environment.” His talk highlighted the challenges of achieving micrometric alignment and the innovative solutions implemented to maintain precision under the extreme conditions of the Large Hadron Collider.
There were five short technical presentations followed by short discussions:
1. Towards accurate in-process monitoring and control in metal laser powder bed fusion: metrological solutions and open challenges, by Mr Zanini
2. National guideline for the evaluation of area-related flank data in gear metrology, by Dr Guenther
3. Stacked Multilayer Scintillator for Reducing Measurement Duration in Multispectral Computed Tomography by Prof. Schmitt
4. Application of Digital-Metrological Twins for emerging measurement technology in advanced manufacturing by Dr. Heißelmann
5. Indirect optical geometry measurements with optical tweezers by Prof. Fischer
The STC P paper session, held on August 18 and 20, 2025, featured 15 presentations covering advances in measurement and precision manufacturing technologies. Topics included spindle geometric error measurement, CNN-based machine vision traceability and uncertainty, compliance-error compensation in robots, and gear metrology. Other studies addressed terahertz interferometry, multiscale and spectral optical imaging, grating interferometry, confocal 3D surface measurement, chromatic phase-retardation imaging, and near-field heat-transfer detection. Data-driven metrology was highlighted through XCT quality assessment and machine-learning-enhanced reconstruction. Ultra-precision manufacturing research included microlens array fly-cutting, aspheric mirror toolpath generation, and force-based in-process reconstruction of microstructured surfaces.
All papers were clearly presented and generated active and constructive discussions throughout the session. Detailed information on the technical presentations and discussions at the 2025 STC P meetings can be found in the complete minutesThe minutes, including annexes, are available to CIRP members on the CIRP website.
Following the STC P officer elections, the new officers are:
• Chairman: Prof. Takaya
• Vice-Chairman: Prof. Morse
• Technical Secretary: Prof. Yagüe-Fabra
Prof. Andreas Archenti
STC P Chairman
December 4, 2025