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ECA: From Qualitative to Quantitative

Webinars 03 November 2020

TWI is pleased to announce that we are holding a free-to-attend webinar entitled Engineering Critical Assessment: From Qualitative to Quantitative’ on 3 November 2020.

Brief introduction

This webinar will address several initiatives currently underway at TWI and NSIRC to progress engineering critical assessment (ECA) from the qualitative (is the structure safe, based on established best practice?) to quantitative (what is the probability of failure, and how does this impact on engineering risk?). The seminar will present progress on a number of current projects, including:

  • TWI Core Research Programme (CRP): A comparison between ‘top down’ (risk-based inspection/RBI) and ‘bottom-up’ (probabilistic fracture mechanics/PFM) approaches to reliability of pressure vessels and pressure piping, and the implications for codes and standards;
  • National Structural Integrity Research Centre (NSIRC): Probabilistic treatment of welding residual stress, and how this can be incorporated into PFM calculations;
  • Industry-driven programmes;
  • Progress towards incorporating PFM into codes and standards.

Who should attend:

  • Structural Integrity Engineers
  • Asset Integrity Managers
  • Reliability Engineers


Prof. Isabel Hadley - Technology Fellow – Materials and Structural Integrity Technology Group, TWI

Prof. Isabel Hadley

Technology Fellow – Materials and Structural Integrity Technology Group, TWI

Isabel’s technical work at TWI focuses on the development of analytical flaw assessment techniques, and their application to safety-critical structures and pressure equipment. Chairing the committee that develops and maintains BS 7910 (UK flaw assessment procedure), Isabel is also a member of the R6 (UK nuclear assessment procedure) panel and a co-author of the European FITNET fitness-for-service procedure.

In 2016, Isabel took up the additional role of Royal Academy of Engineering Visiting Professor in Integrity Management at the University of Bristol, an initiative aimed at enhancing the employability of new engineering graduates through exposure to industrial problems and practices.

For more information please email: