wind turbine

System Risk Assessment

During product validation the considered system should be understood in as much detail as possible in order to select the issues most likely to drive future warranty costs, and allocate effort accordingly. Unexpectedly high levels of field failures often indicate a lack of knowledge, while sometimes they point towards a lack of analysis. Complementary top-down plus bottom-up system analysis has proven to be the most effective foundation for reliability supporting projects.

 
Top-down

System analysis is performed with experts responsible for product design, development, supply chain and marketing. The assessment delivers targets vs. validation effort and time, statements on technology maturity, infrastructure, organisational and time-risks.

Assessment of feasibility and risk focus are derived and the component analysis program is concentrated on potential risk drivers.


 
Bottom-up

Implicitly there is often a large amount of knowledge about failure modes, mechanisms and effects in the engineering community. The corresponding analysis (FMMEA) is the basis for a reliability centred approach, developed by Uptime Engineering during assessment projects for various technical systems (engines, gearboxes, vehicles, electrical drive-trains, wind turbines).
 
As a result critical operation modes and boundaries are identified via analysis of failure mechanisms. The latter are also highly useful for identification of indicators for failure precursors, further for test identification and for physics of failure based damage models.