Festina Lente and Failure Analysis
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In failure analysis projects, festina lente (FL) is a proverb which outlines a research approach with significant and powerful value. Sometimes, this phrase is received with misunderstanding and skeptical thinking, due to the fact that the word “lente” (slowly) is taken with a negative meaning. However, a deeper consideration of the phrase FL demands a thorough understanding of the actions that have to be taken, their temporal distribution and consequences, establishing a more diligent and knowledgeable approach in cause-and-effect relationship.
Problem/failure understanding This step mainly includes gathering of information, e.g., production data, interviews, literature and service history aiding understanding, which can highlight the optimum and easiest/fastest path to allocate the failure/problem source. However, this step needs time and resources in order to proceed forward.
Target setting The goal(s) of the investigation has or have to be determined, early enough in order to optimize efforts and resources toward the achievement of the objectives of the failure analysis investigation. Management responsibility and commitment assures the resources’ availability toward the satisfaction of the goals. Challenges and risks should be also taken into account since their negligence constitutes a reason for failure.
Action planning and implementation The design of the failure investigation process is of essential importance. Using this approach and knowing the preset targets and available resources, the process can be successfully designed and scheduled. During this planning procedure, e.g., chemical analyses, fractography, materials testing protocols are proposed and executed, simulation scenarios are suggested and implemented.
Performance evaluation Investigation process progress monitoring and exchange of information through reports and communication among the interesting parties give the opportunity of “process control,” processing/analysis of collected information. Process adjustment or revision could be the outcome of such rigorous review, leading to cancellation of unnecessary actions, establishing new ones (e.g., update test methods to be applied) and assisting to the fast delivery of the results.
Review of the results The compilation of the results in a comprehensive manner offers the opportunity to review their soundness, robustness and judgment of the entire value with respect to the preset targets. The quality of the presentation and interpretation are significant indicators that built on scientific/engineering competence and expertise.
Decision for further actions This step is the natural continuation coming from the last step (Review of the results) and requires active involvement of the investigation team members, top management commitment and engagement and very frequently the involvement of the main interested parties (e.g., customer). The outcome of the action indicates the end of the process or activates another loop of investigation.