Dave Loffredo's Publications

Peer Reviewed

• M. Hardwick, Y. F. Zhao, F. M. Proctor, A. Nassehi, X. Xu, S. Venkatesh, D. Odendahl, L. Xu, M. Hedlind, M. Lundgren, L. Maggiano, D. Loffredo, J. Fritz, B. Olsson, J. Garrido, A Brail, “A roadmap for STEP-NC-enabled interoperable manufacturing,” International Journal of Advanced Manufacturing Technology, Vol. 68, No. 5, September 2013, pp 1023-1037. doi:10.1007/s00170-013-4894-0
• Hardwick, M. and Loffredo, D., “Challenges and Choices in the Specification and Implementation of the STEP-NC AP-238 Standard,” Journal of Computing and Information Science in Engineering, Vol. 7, No. 3, September 2007, pp 283-291. doi:10.1115/1.2768090
• Hardwick, M. and Loffredo, D., “Lessons Learned Implementing STEP-NC AP-238,” International Journal of Computer Integrated Manufacturing, Vol. 19, No. 6, September 2006, pp. 523-532, doi:10.1080/09511920600627170
• Hardwick, M. and Loffredo, D., “The STEP International Data Standard Evolves into Manufacturing,” Journal of the Japan Society for Precision Engineering, Vol. 67, No. 5, May 2001, pp. 733-738. doi:10.2493/jjspe.67.733
• Loffredo, D., Efficient Database Implementation of EXPRESS Information Models, PhD Thesis, Rensselaer Polytechnic Institute, May 1998.

ISO Standards (as editor)

• ISO 10303-238:2022 (third edition), Industrial Automation Systems and Integration — Product Data Representation and Exchange — Part 238: Application protocol: Model based integrated manufacturing, Geneva, International Organization for Standardization. ISO TC184/SC4 WG15 Document N196. September 2022.
• ISO 10303-238:2020 (second edition), Industrial Automation Systems and Integration — Product Data Representation and Exchange — Part 238: Application protocol: Model based integrated manufacturing, Geneva, International Organization for Standardization. ISO TC184/SC4 WG15 Document N94, November 2020.
• ISO 10303-238:2007, Industrial Automation Systems and Integration — Product Data Representation and Exchange — Part 238: Application protocol: Application Interpreted Model for Computerized Numerical Controllers, Geneva, International Organization for Standardization. Also ISO TC184/SC4 WG3 Document N2101, October 2006.
• ISO 10303-21:2002 (second edition), Industrial Automation Systems and Integration — Product Data Representation and Exchange — Part 21: Implementation Methods: Clear Text Encoding of the Exchange Structure, Geneva, International Organization for Standardization. Also ISO TC184/SC4 WG11 Document N177, October 2001.
• ISO 10303-24:2001, Industrial Automation Systems and Integration — Product Data Representation and Exchange — Part 24: Implementation Methods: C Language Binding of Standard Data Access Interface, Geneva, International Organization for Standardization. Also ISO TC184/SC4 WG11 Document N164, June 2001.
• ISO 10303-21/DAM1, Industrial Automation Systems and Integration — Product Data Representation and Exchange — Part 21: Implementation Methods: Clear Text Encoding of the Exchange Structure, Draft Amendment 1, ISO TC184/SC4 WG11 Document N71, February 10, 1999.

Conference and Other Publications

• Loffredo, D., “ISO 10303-238: An Integrated Protocol for NC Machining,” in Interoperability for Digital Engineering Systems, A. Moreno, Ed, Milan, Italy, FrancoAngeli, 2014, pp. 141-153. ISBN 978-88-917-0600-3.
• M. Hardwick, D. Loffredo, J. Fritz, M. Hedlind: “Enabling the Crowd Sourcing of Very Large Product Models,” Digital Product and Process Development Systems - IFIP TC 5 International Conference, NEW PROLAMAT 2013, Dresden, Germany, October 10-11, 2013. pp 254-272. doi:10.1007/978-3-642-41329-2_26
• M. Hardwick, F. Proctor, D. Loffredo, S. Venkatesh, “Enabling Machine Vision Using STEP-NC,” Proceedings of the ASME 2012 International Manufacturing Science and Engineering Conference, Notre Dame, Indiana, June 4-8, 2012, pp. 763-770. doi:10.1115/MSEC2012-7310
• Hardwick, M., Loffredo, D., “STEP-NC: Smart Data for Smart Machining”, Proceedings of the Intl. Conf. on Smart Machining Systems, NIST, Gaithersburg, MD, March 2007.
• Loffredo, D., “Don't Model the Staplers: Keep your information architecture relevant by limiting your scope, knowing your deliverable, and not letting your tools control you,” The IT Architect Skills Library, International Association of Software Architects, 2007. (Direct link to the article on MSDN)
• Loffredo, D., “SEDS submitted to TC184/SC1 on the ISO 14649 parts (submitted with ISO/IS 10303-238),” ISO TC184/SC4 WG3 Document N2100, July 27, 2006.
• Loffredo, D., “Validation Report for ISO/IS 10303-238,” ISO TC184/SC4 WG3 Document N2098, July 14, 2006. (supersedes wg3n1538)
• Loffredo, D., “GD&T Harmonization Final Results,” ISO TC184/SC4 WG3 Document N1902, June 21, 2005. (supersedes wg3n1514).
• Barnard-Feeney, A., et al., “STEP-NC Implementation — ARM or AIM?” TC184/SC4 WG3 Document N1223, February 12, 2003.
• Loffredo, D., “EXPRESS Amendment Impact on 20-series Parts,” ISO TC184/SC4 WG11 Document N179, October 4, 2001.
• Hardwick, M. and Loffredo, D., “STEP Into NC,” Manufacturing Engineering, Vol. 126, No. 1, January 2001, pp. 38-50.
• Loffredo, D., “Fundamentals of STEP Implementation.” Technical report, STEP Tools Inc., Troy, New York, 1999.
• Loffredo, D., “Product Data Exchange with STEP,” E-COMM, Vol. 1, No. 1, August/September 1995, pp. 71-77.
• Hardwick, M. and Loffredo, D., “Using EXPRESS to Implement Concurrent Engineering Databases,” Proc. of Intl. Computers in Engineering Conference and the ASME Database Symposium, Boston, Mass., September 17-21, 1995. Awarded Best Paper of Conference.
• Loffredo, D. and Hardwick, M., “Efficient Implementation of EXPRESS Information Models,” Proc. of EUG '94 — The Fourth EXPRESS Users Group Conference, Greenville, So. Carolina, October 1994.
• Hardwick, M., et al., “Managing Change using STEP/EXPRESS,” Technical Report 91016, Rensselaer Design Research Center, Rensselaer Polytechnic Institute, Troy, New York, 1991.
• Hardwick, M., et al., “Change Processing Tools for Concurrent Engineering,” Technical Report 91010, Rensselaer Design Research Center, Rensselaer Polytechnic Institute, Troy, New York, 1991.
• Loffredo, D., ed., ST-Developer ROSE Library Reference Manual, STEP Tools, Inc., Troy, New York, 1991-2010.
• Loffredo, D., ed., ST-Developer ROSE Library Tutorial Manual, STEP Tools, Inc., Troy, New York, 1991-2006.
• Loffredo, D., ed., ST-Developer SDAI CD Library Reference Manual, STEP Tools, Inc., Troy, New York, 1991-1999.
• Loffredo, D., ed., ST-Developer Tools Reference Manual, STEP Tools, Inc., Troy, New York, 1991-2010.
• Loffredo, D, “An X11 Graphics Extension for the ROSE Database System,” Technical Report 90040, Rensselaer Design Research Center, Rensselaer Polytechnic Institute, Troy, New York, 1990.
• Hardwick, M., D. Spooner, E. Hvannberg, B. Downie, A. Faulstich, D. Loffredo, A. Mehta, D. Sanderson, “ROSE — A Database System for Concurrent Engineering Applications,” Proc. of the Second Conf. on Concurrent Engineering, CERC, West Virginia University, February 1990
• Hardwick, M., et al., “ROSE: A Database System for Concurrent Engineering Applications,” Technical Report 89-28, Computer Science Department, Rensselaer Polytechnic Institute, Troy, New York, 1989.

Talks

• “Status of STEP Part 21 Edition 3,” WG11 Implementation Methods, ISO TC184/SC4 Meeting, Baltimore, MD, Oct. 19, 2015.
• “Process Monitoring using STEP and MTConnect,” 2015 Rensselaer CATS / CEG Advanced Manufacturing Conference, Albany NR, Oct. 14, 2015.
• “Enabling Model Based Machining with a New Data Standard,” Aviation and Missile Research, Development, and Engineering Center (AMRDEC), Huntsville, AL, Sept. 25, 2014
• “Model Based Machining,” IMTS 2014, Chicago, IL, Sept. 11, 2014
• “STEP Part 21 Third Edition Review,” WG11 Implementation Methods, ISO TC184/SC4 Meeting, Philadelphia, PA, May. 5, 2014.
• “National Simulation Service,” DARPA Adaptive Vehicle Make (AVM), Principle Investigators Meeting, Minneapolis, MN, May 22, 2013.
• “Part 21 Extension for Big Distributed STEP Data,” SC4 Change Management, ISO TC184/SC4 Meeting, Miami, FL, November 12, 2012.
• “External References in STEP Data,” Joint WG11/WG3T24 Meeting on External References, ISO TC184/SC4 Meeting, Stockholm, Sweden, June 11, 2012
• “National Simulation Service - Fusion of manufacturing information, Quick, responsive, and consistent in SMALL and large quantities,” DARPA Adaptive Vehicle Make (AVM), Principle Investigators Meeting, Purdue University, IN, March 20, 2012.
• Programming with STEP and IGES, Course Instructor, Autodesk, Novi MI, May 24-27, 2011.
• “Summary of AP-238 Second Edition Enhancements,” STEP Manufacturing WG3/T24. ISO TC184/SC4 Meeting, NIST, Gaithersburg, MD, June 18, 2010.
• Review of AP-238 Technical Corrigendum, STEP Manufacturing WG3/T24. ISO TC184/SC4 Meeting, Hartford, CT, October 1-2, 2008.
• STEP-NC AP-238 Aerospace Machining Demonstration, Laboratoire de Génie mécanique, Université Paul Sabatier, Toulouse, France, June 28, 2006.
• “AP-238 IS Status and Walkthrough,” STEP Manufacturing WG3/T24. ISO TC184/SC4 Meeting, Toulouse, France, June 27, 2006.
• STEP-NC AP-238 DIS Ballot Resolution Workshop, ISO TC184/SC4 Meeting, Valencia, Spain, June 12-17, 2005.
• STEP-NC AP-238 Closed-Loop Manufacturing Demonstration, EASTEC 2005, Springfield, MA, May 24-26, 2005.
• STEP-NC AP-238 CC1 5-Axis Demonstration on Fanuc 30i and Siemens 840D Controls, OMAC STEP-NC Working Group Meeting, Orlando FL, February 3-4, 2005.
• Demonstration of STEP-NC Toolpath Control on a Fanuc 16i, GSIE AGILE Meeting, Watervliet Arsenal, Watervliet NY, December 16, 2004.
• “AP-238 DIS Walkthrough,” STEP Manufacturing WG3/T24. ISO TC184/SC4 Meeting, Seattle, WA, October 7, 2004.
• STEP GD&T Harmonization Workshop, ISO TC184/SC4 Meeting, Seattle, WA, October 5, 2004.
• STEP GD&T Harmonization Workshop, ISO TC184/SC4 Meeting, Bath, UK, July 5-7, 2004.
• “AP-238 Status,” STEP Manufacturing WG3/T24. ISO TC184/SC4 Meeting, Bath, UK, July 6, 2004.
• STEP-NC Milling Demonstration, OMAC STEP-NC Working Group Meeting, Orlando FL, January 28-29, 2004.
• STEP-NC Milling Demonstration, 2003 Automation in Shipbuilding Conference. Hyatt Regency New Orleans, New Orleans LA, December 10-12, 2003.
• STEP-NC Milling Demonstration, Bath Iron Works, Brunswick ME, November 12, 2003.
• “New Horizons in Plate Cutting and Pipe Bending,” STEP-NC Milling Demonstration, Northrop Grumman Ship Systems, Ingalls Operations, Pascagoula MS, October 22, 2003.
• “High Level Programming using the STIX Library,” Super Model Project, 7th Industrial Review Board Meeting — New Horizons in CNC Surfacing and Probing, National Institute of Standards and Technology (NIST), Gaithersburg MD, June 4, 2003.
• “AP-238 Direct Interface,” Super Model Project, 6th Industrial Review Board Meeting — STEP-NC on a Multi-Axis Machine, NASA Jet Propulsion Lab, Pasadena CA, January 30, 2003.
• “STEP-NC for Plate Cutting and Pipe Bending,” Joint meeting, STEP Shipbuilding WG3/T23 and STEP Manufacturing WG3/T24. Seoul, Korea, November 7, 2002.
• “Build Anywhere Using STEP-NC,” International Workshop on STEP-NC Technology, National Research Lab for STEP-NC Technology (NRL-SNT), POSTECH, Pohang, Korea, November 2, 2002.
• “STEP-NC / AP-224 Turning Feature Comparison,” ISO 14649-12 Ballot Comment Workshop, TC184/SC1 Meeting, Seoul, Korea, October 31, 2002.
• “Overview of Key STEP-NC Concepts,” STEP-NC for Pipe Bending and Cutting Workshop. NIST, Gaithersburg, MD, May 9, 2002.
• “AP-238 Walkthrough,” STEP Manufacturing WG3/T24. Myrtle Beach, SC, ISO TC184/SC4 meeting, February 26, 2002.
• “AP-238 Status and Walkthrough,” STEP Manufacturing WG3/T24. Fukuoka Japan, ISO TC184/SC4 meeting, October 2, 2001.
• “AP-238 Integrated Model,” STEP Manufacturing WG3/T24. San Francisco, CA, ISO TC184/SC4 meeting, June 14, 2001.
• “Technical Review of Results of Frankfurt SC1 Meeting,” Model Driven Intelligent Control of Manufacturing, Fourth Industrial Review Board meeting, Troy NY, June 6, 2001
• “STEP-NC/AP-224 Feature Comparison,” ISO 14649 DIS Ballot Resolution Workshop. TC184/SC1 meeting, VDMA Frankfurt, Germany, May 9-10, 2001
• “STEP-NC: AIM Issues Discussion,” STEP Manufacturing WG3/T24. Funchal ISO TC184/SC4 meeting, February 22, 2001.
• “STEP-NC: E-Manufacturing Using STEP,” STEP for Aerospace Workshop, Jet Propulsion Laboratory, Pasadena, CA January 16-19, 2001
• “Review of STEP-NC Integrated Data Model,” STEP Manufacturing seminar hosted by ISO TC184/SC4/WG3/T19. Charleston ISO TC184/SC4 meeting, October 13, 2000.
• “The STEP ISO Standard,” Workshop on Integration of Software Tools for Power Electronics Design, Hotel Roanoke, Roanoke, Virginia. Hosted by Virginia Polytechnic Institute and the Center for Power Electronic Systems, July 19, 2000.
• “Harmonization of STEP-NC Integrated Data Model,” STEP Manufacturing seminar hosted by ISO TC184/SC4/WG3/T19. Bordeaux ISO TC184/SC4 meeting, June 28, 2000.
• “STEP and PDM,” PDM '97, Manchester, UK, February 20, 1997.