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The Causal Analysis Framework: Refining Approaches and Expanding Multidisciplinary Applications

ABSTRACT This series of articles provides perspectives and recent case examples reflective of the growing interest in and need for formal causal analysis procedures that narrow the uncertainties associated with understanding cause and effect relationships in environmental and health matters. That understanding is important for guiding prevention, remediation, and/or restoration efforts pertaining to environmental stressors. A defensible establishment or refutation of causes is often needed to support legal opinions and/or reach decisions on specific regulatory actions. For complex environmental and health matters, the ability to support cause and effect relationships to a reasonable degree of certainty depends not only on the existence of the relationships but also on the analyst's ability to examine alternative possibilities and to use available evidence to support scientific opinion. Formal casual analyses have evolved to provide analysts with organized frameworks for weighing evidence and decreasing the likelihood of missing important aspects of cause and effect relationships as problems become increasingly complex and less familiar. In this perspectives series, the causal analysis method is explored through additional examination of the underlying philosophies and history of approaches that serve as the foundation of what we consider causal analysis today. In addition, examples of applied causal analysis provide insights into the challenges and benefits of a well thought out causal analysis.