QX/T 439-2018 in English

Analysis of the Standard's Core Essentials

This standard innovatively constructs a two-dimensional meteorological disaster risk assessment model, integrating risk tolerance (weighted at 0.67) and risk control capability (weighted at 0.33) through the Analytic Hierarchy Process (AHP). Risk tolerance is broken down into three dimensions: population, economy, and activity. Risk control capability encompasses three key measures: early warning, prevention, and mitigation.

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In-depth Interpretation of the Evaluation Index System

Indicator Type	First-level Indicator	Second-level Indicator	Typical Evaluation Factors
Risk Tolerance	Population Tolerance	Health and Safety Factor	Probability of Injury from Extreme Weather
	Economic Tolerance	Direct Loss Threshold	Facility Damage Repair Cost
	Activity Tolerance	Process Interruption Tolerance	Completeness of Backup Plans

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Technology Evolution Analysis

Compared to QX/T 274-2015, this standard achieves three major breakthroughs: 1) Introducing the quantified weighting of the Analytical Hierarchy Model; 2) Establishing a five-level grading system (extremely strong → extremely weak); and 3) Introducing the principle of taking the minimum value for the combined effects of multiple hazards. The example table in Appendix B shows that the overall score for haze disasters reached 5.34 points (out of 10), significantly higher than the 1.93 points for typhoons.

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Implementation Recommendations

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Application value of the standard

This standard can reduce the meteorological disaster loss rate of large-scale events by about 42% (reference [6] data) through the technical path of quantitative assessment → graded warning → precise policy implementation. Especially suitable for:
• International sports events (such as the opening and closing ceremonies of the Olympic Games)
• Open-air performances with a scale of 10,000 people
• National political rallies