State-of-the-Art Measurement Analysis Software, Training and Consulting Services
Celebrating over 32 YRS of Excellence and Innovation 1987-2019



About Integrated Sciences Group


Designing, building and managing today's technology requires an in-depth knowledge of measurement science.  This includes not only knowing how to make measurements, but also how to analyze measurement data, interpret results, project trends and minimize decision risks.


We have pioneered many of the major advances in measurement uncertainty analysis, measurement decision risk analysis, statistical measurement process control and calibration interval analysis. Consequently, our knowledge in these areas is second to none. 


Since our inception in 1987, we have incorporated this knowledge in user-friendly software applications designed to help you, the technical professional, make informed measurement analysis decisions, assure measurement quality and deal with the stringent requirements of the international marketplace.




Suzanne Castrup has B.S. and M.S. degrees in Mechanical Engineering and has over thirty-five years of experience in the field of measurement science, specializing in fluid mechanics, thermodynamics and heat transfer.  Prior to joining Integrated Sciences Group, Ms. Castrup was Technical Advisor for Thermal EOR in Chevron's Western Basins Group.  Ms. Castrup also spent eleven years as a Research Engineer at Chevron's Oil Field Research Center conducting laboratory and field experiments.  Through her various benchmark analytical and experimental studies, she gained considerable experience in testing and calibrating a variety of measurement equipment and conducting uncertainty analyses.


Ms. Castrup is a member of ASME, ISA and SPE, chair of the NCSLI Uncertainty Analysis (RP-12) and Equipment Specifications (RP-5) Committees and has served as chair of the NCSLI Petroleum Industry Metrology Committee. She is also the developer and instructor of NCSLI RP-12 and RP-5 tutorials and is a recipient of the 2005 NCSLI  Education & Training Award.  Ms. Castrup teaches several petroleum courses focusing on performance optimization of thermally enhanced oil recovery projects.  She has published numerous technical papers, holds several U.S. Patents and is a recipient of the 2006 SPE Western Region Award and the 2007 SPE International Award for distinguished contributions to petroleum engineering projects, facilities and construction.  Click Here for a list of professional accomplishments.

Chief Scientist 
Dr. Howard Castrup has B.S. and PhD degrees in engineering.  He has been developing advanced measurement science techniques and methods for over forty years, is one of the founders of uncertainty growth modeling, the originator of statistical measurement process control (SMPC), a major contributor to NASA Reference Publication 1342, the NCSLI Recommended Practice on Calibration Intervals (RP-1) and NASA HNBK-8739-19.  Prior to founding Integrated Sciences Group, Dr. Castrup worked as a Microwave Electronics Instructor, an RF and Microwave Metrology Engineer, a Sr. Statistician, Sr. Systems Analyst, and Project Manager.


Dr. Castrup is a member of IEEE, Sigma Pi Sigma, AIP, AAPT, and is the chairman of the Measurement Decision Risk, Decision Support and SPC Committees. He has published numerous technical papers and articles on uncertainty analysis, measurement decision risk analysis, statistical process control, and calibration interval analysis.  He is also the developer and instructor of several NCSLI tutorials that cover these topics and is a recipient of the 2005 NCSLI Education & Training Award.  Dr. Castrup is also the recipient of the 2002 Wildhack and 2007 Woodington Awards for his numerous contributions to the advancement and understanding of analytical metrology and measurement sciences.  Click Here for a list of professional accomplishments.


Our Customers 

ISG is proud to serve a wide variety of companies and organizations that know the importance of staying at the leading edge of technology management. Click Here to view a partial list of our customers.



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Integrated Sciences Group
14608 Casitas Canyon Road Bakersfield, CA 93306
Phone 1-661-872-1683 FAX 1-661-872-3669


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Page Updated May 01, 2019