Elements in uncertainty analysis	Potential contribution of this approach
Identifying uncertainties	Structured approach promotes identification of uncertainties affecting individual lines of evidence and overall conclusion
Characterising uncertainties	Concise narrative description of each line of evidence including strengths, weaknesses and uncertainties. Strengths, weaknesses and uncertainties of individual lines of evidence and their impact on the conclusion are assessed by expert judgement
Combining uncertainties	The combined impact of all the lines of evidence and their uncertainties is assessed by expert judgement and expressed as a probability or range of probabilities for a positive conclusion
Prioritising uncertainties	The relative importance of uncertainties affecting individual lines of evidence can be assessed by considering the weaknesses identified in the table. The ordinal scale for influence indicates what each line of evidence contributes to the balance of probability (uncertainty) for the conclusion