Framing the decision before the model
Decision makers and modellers agree the options, objectives and key uncertainties first, so the model is built to inform an actual choice.
GCRI · 系统科学与建模
Decision analysis under uncertainty connects models to choices. In this field it frames what decision a model serves, which outcomes matter, how uncertainty affects the choice and when more modelling would change the decision, so modelling effort goes where it adds value.
Decision analysis under uncertainty provides structured methods for choosing among options when outcomes are uncertain and objectives conflict. It makes trade-offs and value judgements explicit. In methods and modelling, risk management and 系统性风险 and research and evidence, decision analysis helps choose actions that perform acceptably across interconnected risks and uncertain futures. It clarifies when to act now and when to keep options open. The canonical description is on STEM Commons.
Decision makers and modellers agree the options, objectives and key uncertainties first, so the model is built to inform an actual choice.
The expected improvement in a decision from reducing a model uncertainty is estimated before investing in further model development.
Results are presented as consequences of options under uncertainty, with ranges and assumptions, rather than single predictions.
模型、其假设、数据和不确定性,以科学家或工程师会核查的形式呈现。结构遵循已发表的方法。所取数值仅为示意,不是研究发现。
The model structure used for decision analysis for modelling, the assumptions it makes and how each is tested.
Ri = f(Hi, Ei, Vi, Ci)危害、风险暴露、脆弱性和应对能力EAL = ∑k pk · Lk对年概率为 pkxt+1 = A xt + B ut + εtA carries the couplings, u the shock, ε the error| 假设 | 为何制作 | 如何检验 |
|---|---|---|
| 在一次事件中,危害与暴露相互独立 | 使损失积分保持可计算 | 与基于联合记录拟合的 copula 进行比较 |
| 耦合在工作点附近是线性的 | 让冲击通过 A 传播 | 在线性范围之外施加扰动并比较 |
| 脆弱性曲线可以在不同地点之间迁移使用 | 很少有本地曲线可用 | 在有观测损失的地方据此进行验证 |
| 数据 | 角色 | 标签 |
|---|---|---|
| Elicited objectives and options | Framing | 已声明 |
| Model outputs | Consequences | 模型生成 |
| Uncertainty estimates | 信息价值 | 估算 |
Process explorer · Process
10 steps·4 个阶段
流程
In IPCC AR6 Working Group II, climate risk results from interactions between hazards and a system’s exposure and vulnerability, and responses can add risk.
依据公开来源对某一外部标准或方法的概述。它描述的是该框架的内容,而非任何运行记录。它并不表明 Nexus 或任何合作伙伴执行、认证或批准某一步骤。关口是该方法的一个步骤,绝不是 Nexus 的批准。
| 核查 | 如何开展 |
|---|---|
| Decision relevance review | Modelling plans are reviewed for relevance to the decision |
| Sensitivity of choice | Analysis tests whether uncertainty changes the preferred option |
| Communication testing | Result presentations are tested with intended users |
结果取决于征询得到的概率与偏好,而这些可能存在偏倚。深度不确定性可能使期望值比较产生误导。
报告 is the Consortium’s quarterly publication. What you know about this subject can become evidence, a case or a correction in the next edition, credited to you and published under CC BY 4.0 where it is your own work.
切勿发送个人数据、敏感基础设施细节或您无权分享的任何内容。贡献在使用前会经过审查;发送贡献不赋予署名权或编辑权,赞助也绝不能换取研究结论。
本网站上的地图、数据和图表仅作为背景和一般信息展示。它们不是建议、预测或预警;信息的局限见免责声明和数据说明。
This site uses only strictly necessary cookies to work and to remember your privacy choices. Nothing loads from other companies, and we never sell or share your personal information.
This site uses only strictly necessary cookies to work and to remember your privacy choices. Nothing loads from other companies, and we never sell or share your personal information. We run no advertising. You can review your choices at any time through Privacy choices at the foot of every page.