What is 7Epsilon?



In 7Epsilon context, the in-process quality improvement is continual improvement, as defined by the ISO9001:2015 standard (definition 3.21), using in-process data and product specific process knowledge. The 7Epsilon concept is designed for mannufacturing industry to achieve in-process quality improvements, and to help embedding risk based thinking as well as organisational knowledge concepts into its quality management system in order to satisfy the additional requirements of ISO9001:2015 as compared to ISO9001:2008. The 7 Steps of 7ε to ERADICATE defects effectively refine Six Sigma’s Measure, Analyze and Improve steps in order to reinforce strategies for in-process quality improvement and organisational knowledge discovery along with its retrieval, reuse, revision and retention.


As an example, the foundry industry is continuing to lose over 5.7 billion € per year, producing landfill waste well in excess of two million tonnes per year and releasing just under two million tonnes of CO2 emissions per year [1]. The 7Epsilon initiative believes that these are avoidable losses and it's in-process quality improvement steps can help foundries recover these costs.


I am a process engineer. How would 7Epsilon’s in-process quality improvement technique based on 7 Steps to ERADICATE defects help me?

Many manufacturing processes such as casting, powder processing or bio-techonolgy processes are considered as complex processes not only because it has several sub-processes, but for most sub-processes, it is difficult to assign variability in process responses to the tolerance limits or levels of one or more measurable factors. Each industry has its own product specific optimal values for various measurable factors and it is normally not possible to reproduce the same process variability in two industries – even if the industries are owned by the same management.

The 7 steps of 7Epsilon to ERADICATE Defects offer a template that process engineers can use for in-process quality improvement and stimulate a culture of innovation. It gives you step by step procedure for reusing in-process data, as well as existing product specific process knowledge, to discover new industry specific process knowledge for every product and explore new continual improvement opportunities as required by the ISO 9001:2015 quality standard.


Refer to the World Foundry Congress paper [2] for a case study and the template, join one of our official 7Epsilon for ISO9001:2015 courses or contact Dr Meghana Ransing to arrange an on-site course for your organisation.


1. R. S. Ransing, C. Giannetti, M.R. Ransing and M. W. James, “A coupled penalty matrix approach and principal component based co-linearity index technique to discover product specific foundry process knowledge from in-process data in order to reduce defects.,” Computers in Industry, vol 64, issue 5, pp. 514-523, (2013).

2. H.Md. Roshan, C. Giannetti, M.R. Ransing and R.S. Ransing, “If only my foundry knew what it knows …”: A 7Epsilon perspective on root cause analysis and corrective action plans for ISO9001:2008, 71 st World Foundry Congress, UK Exchange Paper, 19-21 May 2014, Bilbao, Spain. PowerPoint Presentation