Dr. Howard Castrup
President and Founder

Dr. Castrup has published numerous technical papers and articles relating to analytical metrology and measurement analysis methods.  He is active in the Measurement Science Conference and the NCSLI and has developed and teaches courses in measurement uncertainty analysis and statistical measurement process control, measurement decision risk analysis, and calibration interval analysis.  His published papers, organization memberships and committee work are listed below.  Email address: hcastrup@isgmax.com.

Castrup, H.: Selecting and Applying Error Distributions in Uncertainty Analysis, presented at the 2004 Measurement Science Conference, January 16-17, 2004 in Anaheim, CA.

Castrup, H.: Risk-Based Control Limits, Proc. Measurement. Science Conf., Anaheim, CA, January 2001.

Castrup, H.: Estimating Category B Degrees of Freedom, Proc. Measurement. Science Conf., Anaheim, CA, January 2000.

Castrup, H. et al.: Establishment and Adjustment of Calibration Intervals, NSCL RP-1, 3rd Edition, January 1996.

Castrup, H.: Uncertainty Analysis and Parameter Tolerancing, Proc. NCSL Workshop & Symposium, Dallas, TX, July 1995.

Castrup, H.: Analyzing Uncertainty for Risk Management, Proc. ASQC 49th Annual Qual. Congress, Cincinnati, OH, May 1995.

Castrup,  H.: Uncertainty Analysis for Risk Management, Proc. Measurement. Science Conf., Anaheim, CA, January 1995.

Castrup, H. and Johnson, K.: Techniques for Optimizing Calibration Intervals, Proc. ASNE Test & Calibration Symposium, Arlington, VA, November - December 1994.

Castrup, H. et al.: Metrology - Calibration and Measurement Processes Guidelines, NASA Reference Publication 1342, June 1994.

Castrup, H.: Practical Methods for Analysis of Uncertainty Propagation, Proc. 38th Annual Instrumentation Symposium, Las Vegas, NV, April 1992.

Castrup, H.: Analytical Metrology SPC for ATE Implementation, Proc. NCSL Workshop & Symposium, Albuquerque, NM, August 1991.

Jackson, D. and Castrup,  H.: Reliability Analysis Methods for Calibration Intervals: Analysis of Type III Censored Data, Proc. NCSL Workshop & Symposium, Denver, CO, July 1987.

Castrup,  H.:  Intercomparison of Standards: General Case, SAI Comsystems Technical Report, U.S. Navy Contract N00123-83-D-0015, Delivery Order 4M03, March 16, 1984.

Castrup, H.: Evaluation of Customer and Manufacturer Risk vs Acceptance Test Instrument In-Tolerance Level, Proc. NCSL Workshop & Symposium, Gaithersburg, MD, September 1980.

Organizations, Committees and Awards
NCSL International
Actively involved since 1974.
Member Delegate since 1980.
Chairman of Metrology Practices Committee
Director of Western Division 
Chairman of Calibration Interval Committee 
Frequent chair of conference sessions on various topics in analytical metrology.
Recipient of 2002 Wildhack Award