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GRF · Foresight Nexus

战略情景

Scenarios are structured descriptions of plausible alternative futures, built so that an institution can test its strategy against conditions it does not expect. They are not forecasts and carry no probability. Their worth lies in widening the range of futures that decision-makers take seriously, exposing hidden assumptions and preparing options in advance. This page sets out how scenario work is designed, how it succeeds or fails inside institutions, and who uses it.

01登记

Strategic scenarios on the record.

02问题

Strategic scenarios: how the risk develops.

Plausible alternative futures. The dossier below sets out how the risk develops, what is measured, where the data come from, how it is modelled and who decides.

机制

Drivers and critical uncertainties

Scenario design starts by separating predetermined elements, such as cohorts already born, from critical uncertainties whose direction is open and whose impact is large. The choice of uncertainties shapes everything that follows, so it is documented and challenged.

机制

Divergent, consistent futures

Each scenario follows a coherent logic from today to the horizon. Consistency checks remove combinations that cannot coexist; divergence ensures the set spans futures that would call for different responses.

机制

Testing strategy, not choosing a future

Policies and plans are wind-tunnelled against every scenario. A strategy that works in only one future is fragile; one that holds across the set, or can be adapted in time, is robust.

机制

Capture and fatigue

Scenarios fail when they are written to confirm an agreed plan, when a preferred scenario quietly becomes the forecast, or when the set is never refreshed. Ownership by a decision-holder and a review schedule keep them in use.

03地理

北极地区的危害与风险暴露。

Daytime surface heat, population density and rain over the Arctic, from NASA GIBS. Each layer carries its own date.

交互式地图需要JavaScript;图层列表和来源见下文。

图层 3

本页面的危害与暴露

关于此图层
证据
观测(持续云层仍会造成缺口)
来源
VIIRS NOAA-20 3 级产品,8 日(NASA LANCE)
提供方
NASA LANCE
许可协议
NASA 开放数据
年份版本
8 日;卫星 8 日合成;持续云层仍会造成缺口
构建时的最新内容
2026-09-14
分辨率
约 1 公里网格
不确定性
截至所示日期的 8 天内地表的卫星表面温度,是一项热风险暴露指标;不是气温、热指数或高温预警。
可通过以下方式到达
gibs.earthdata.nasa.gov,仅在您允许加载实时地图后访问
关于此图层
证据
估计值
来源
世界网格化人口 v4.11(NASA SEDAC(哥伦比亚大学 CIESIN))
提供方
NASA SEDAC(CIESIN,哥伦比亚大学)
许可协议
CC BY 4.0
年份版本
null;基于人口普查的估算,静态(2020)
分辨率
约 1 公里网格
不确定性
基于普查的 2020 年每平方公里人口估算,作为风险暴露背景展示;不是受任何危害影响的人口数。
可通过以下方式到达
gibs.earthdata.nasa.gov,仅在您允许加载实时地图后访问
关于此图层
证据
估计值
来源
GPM IMERG(NASA GES DISC)
提供方
NASA GES DISC
许可协议
NASA 开放数据
年份版本
每日;近实时卫星估算
构建时的最新内容
2026-10-12
分辨率
约 2 公里网格
不确定性
近实时卫星估算。卫星或模型栅格数据,按提供方发布的原样呈现。云层、条带缺口和反演误差会造成缺口和噪声;数值是指标,而非某地的测量值。
可通过以下方式到达
gibs.earthdata.nasa.gov,仅在您允许加载实时地图后访问
关于此图层
证据
观测(云层造成缺口)
来源
VIIRS 全球洪水产品(NASA LANCE)
提供方
NASA LANCE
许可协议
NASA 开放数据
年份版本
每日;卫星探测;云层造成缺口
构建时的最新内容
2026-10-14
分辨率
约 250 米网格
不确定性
卫星探测;云层造成缺口。按提供方发布的原样提供的卫星或模型栅格数据。云层、扫描带缺口和反演误差会造成缺口和噪声;这些数值是指标,不是某一地点的测量值。
可通过以下方式到达
gibs.earthdata.nasa.gov,仅在您允许加载实时地图后访问
关于此图层
证据
观测(云层和过境时间造成缺口)
来源
VIIRS NOAA-20 375 米(FIRMS)(NASA LANCE FIRMS)
提供方
NASA LANCE FIRMS
许可协议
NASA 开放数据
年份版本
每日;卫星探测;云层和过境时间造成缺口
构建时的最新内容
2026-10-13
分辨率
约 500 米网格
不确定性
所示日期的卫星热点探测结果,包括天然气火炬和工业热源;不是已确认的火情、事件报告或预警。
可通过以下方式到达
gibs.earthdata.nasa.gov,仅在您允许加载实时地图后访问
关于此图层
证据
观测
来源
GHRSST MUR25(NASA JPL PO.DAAC)
提供方
NASA JPL PO.DAAC
许可协议
NASA 开放数据
年份版本
每日;卫星分析
构建时的最新内容
2026-10-12
分辨率
约 2 公里网格
不确定性
对所示日期海温偏离常年值幅度的卫星分析;是海洋热浪指标,并非 珊瑚白化 警报。
可通过以下方式到达
gibs.earthdata.nasa.gov,仅在您允许加载实时地图后访问

最新可用

NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Blue Marble (NASA) · © OpenStreetMap贡献者 (ODbL) · Natural Earth

正在加载最新的NASA影像。

拖动以移动。按住 Ctrl 或 ⌘ 并滚动、双指缩放或使用按钮缩放;悬停可查看指针下的数值;重置可返回该区域。

北极地区的危害与风险暴露。NASA 发布的卫星和模型产品,各带自己的日期。它们是指标,而非对任何地点的评估。

数据:NASA GIBS · ASTER GDEM · Blue Marble · © OpenStreetMap 贡献者 · Natural Earth · NASA EONET · 美国地质调查局 · NASA GPM IMERG Early来源与许可

  • We acknowledge the use of imagery provided by services from NASA’s Global Imagery Browse Services (GIBS), part of NASA’s Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into hexagonal cells where shown (modified). NASA 开放数据
  • We acknowledge the use of imagery provided by services from NASA’s Global Imagery Browse Services (GIBS), part of NASA’s Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into hexagonal cells where shown (modified). NASA 开放数据
  • VIIRS 近实时产品(洪水、地表温度、积雪覆盖、校正反射率),NASA LANCE;影像来自 NASA GIBS。颜色依据已发布的色标重绘;显示处的数值已按六边形网格平均(经修改)。 NASA 开放数据
  • Center for International Earth Science Information Network (CIESIN), Columbia University. 2018. Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11. NASA Socioeconomic Data and Applications Center (SEDAC). 采用 CC BY 4.0 许可。颜色依据已发布的色标重绘;显示处的数值已按六边形网格平均(经修改)。 doi:10.7927/H49C6VHW. CC BY 4.0
  • GPM IMERG 降水,NASA 降水处理系统;由 NASA 戈达德地球科学数据和信息服务中心(GES DISC)分发;影像来自 NASA GIBS。颜色依据已发布的色标重绘;显示处的数值已按六边形网格平均(经修改)。 NASA 开放数据
  • NASA 资源管理火灾信息系统(FIRMS),VIIRS 375 m 活跃火点产品,NASA LANCE;矢量瓦片来自 NASA GIBS。颜色依据已发布的色标重绘;显示处的数值已按六边形网格平均(经修改)。 NASA 开放数据
  • GHRSST Level 4 MUR 分析,NASA 喷气推进实验室;由 NASA 物理海洋学 DAAC(PO.DAAC)分发;影像来自 NASA GIBS。颜色依据已发布的色标重绘;显示处的数值已按六边形网格平均(经修改)。 NASA 开放数据
  • ASTER GDEM 是 METI 和 NASA 的产品(ASTER Global Digital Elevation Model V003,NASA LP DAAC);影像来自 NASA GIBS。颜色依据已发布的色标重绘;显示处的数值已按六边形网格平均(经修改)。引用格式:NASA/METI/AIST/Japan Spacesystems and U.S./Japan ASTER Science Team (2019). ASTER Global Digital Elevation Model V003. doi:10.5067/ASTER/ASTGTM.003. NASA 开放数据
  • 使用 Natural Earth 制作。免费矢量和栅格地图数据,见 naturalearthdata.com。 公有领域
  • © OpenStreetMap 贡献者(ODbL),经由 NASA GIBS(海岸线、边界、道路和地名)。颜色依据已发布的色标重绘;显示处的数值已按六边形网格平均(经修改)。 ODbL
  • Blue Marble,NASA Earth Observatory;影像来自 NASA GIBS。颜色依据已发布的色标重绘;显示处的数值已按六边形网格平均(经修改)。 NASA 开放数据
  • 地球仪和平面地图上的背景信息:海岸线、边界、道路和地名来自 NASA GIBS 参考图层(OpenStreetMap 数据,ODbL,© OpenStreetMap contributors);Blue Marble 影像可作为可选底图;3D 地形和高程读数来自 ASTER GDEM 高程色彩指数(5 m 至 200 m 分级,为便于辨识而作了夸张处理)。边界按已发布的样式绘制,不代表对任何领土的立场。
  • 实时事件:NASA Earth Observatory Natural Event Tracker(EONET);事件仅供参考,并保留其原始来源链接。
  • 实时:NASA EONET。事件仅供参考,不是主管机构的预警。
  • 实时:美国地质调查局。事件仅供参考,不是主管机构的预警。
  • Live: NASA GPM IMERG Early. We acknowledge the use of imagery provided by services from NASA’s Global Imagery Browse Services (GIBS), part of NASA’s Earth Science Data and Information System (ESDIS).
  • NASA GIBS: We acknowledge the use of imagery provided by services from NASA’s Global Imagery Browse Services (GIBS), part of NASA’s Earth Science Data and Information System (ESDIS).
  • 河流流量预报,30天及区间(GloFAS,经Open-Meteo):包含经修改的Copernicus Emergency Management Service 2026年信息;非洪水警报。
  • 天气数据来自 Open-Meteo.com (https://open-meteo.com/), 依据 CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). 授权。
  • 可选图层(图层列表中有 11 个来源:实时、预报、观测和背景)开启时会在地图上和此处显示其提供方署名;预报是模型输出,派生指数是估计值。

图层与日期

  • 地表温度,日间,8 天合成:VIIRS NOAA-20 3 级产品,8 天,NASA LANCE · 2026年9月14日
  • 人口密度,2020 年:人口:哥伦比亚大学 CIESIN,世界网格化人口 v4.11(2018),NASA SEDAC, CC BY 4.0 · 静态
  • 降水率,日均值:GPM IMERG,NASA GES DISC · 2026年10月12日
  • 洪水水体,3 日合成:VIIRS 全球洪水产品,NASA LANCE · 2026年10月14日
  • 活跃火点与热异常:VIIRS NOAA-20 375 m(FIRMS),NASA LANCE FIRMS · 2026年10月13日
  • 海面温度距平:GHRSST MUR25,NASA JPL PO.DAAC · 2026年10月12日

04指标

衡量什么,以及衡量得如何。

每个指标都注明其单位、频率、背后的来源类型以及数值将附带的证据标签。此处不显示数值:数值由计划依据其自身权限提供。

指标单位节奏来源类型标签
Scenario sets in current use by governmentcount of published sets年度Published foresight reports已发布统计
Policies and strategies tested against a scenario setcount per planning cycle每个周期Cabinet and ministry planning records已发布统计
Interval between scenario refreshes月per setPublication record已发布统计
Participant range in scenario exercisespersons by sector, region and age groupper exerciseWorkshop records已报告
Signposts tracked against each scenariocount of signposts每季度Signpost register已报告
Strategies citing scenario evidenceshare of strategy documents年度Document analysis估算
05监测

政策风洞。

团队跟踪该主题时会使用的界面:其指标、状态与决策。名称为示例,数值仅作示意。

政策风洞

Strategic scenarios · Scenario set B · Policy: POL-56

在一个情景中失效GRF · Foresight Nexus

按情景划分的政策绩效

0 失效至 100 稳健

分数越高越稳健。示例分数。

需监测的路标

  1. S-1对投入品的贸易限制触发适应措施 2每季度
  2. S-2传感器成本触发扩大规模年度
Policy wind tunnel: the screen’s structure, terms and states for Strategic scenarios.示例名称和示意数值;是设计方案,并非记录或实时系统。
06来源

证据来自何处。

具名公共数据集与机构记录,各自注明许可类别。依协议获得的来源仅按其条款使用,绝不再次发布。

来源它提供什么许可类别
IPCC AR6 Scenario Database (hosted by IIASA)Quantified emissions, energy and land pathways from integrated assessment models assessed by the IPCCFree with attribution, database licence terms
SSP Database (IIASA)Population, urbanisation and economic projections for each shared socioeconomic pathwayFree with registration, IIASA terms
IEA World Energy Outlook scenariosStated policies, announced pledges and net zero pathways for energy supply and demandIEA terms, part free and part licensed
NGFS 气候情景Transition and physical risk scenarios used by central banks and supervisors免费,须署名
US National Intelligence Council Global TrendsLong-range scenarios on global structural forces, published each presidential termPublic domain, US government work
UK Ministry of Defence Global Strategic TrendsLong-horizon trend analysis and alternative futures for defence and security planning开放政府许可
07政策情景

比较文书:规则、激励和信息。

三类文书与基线并列比较,各有其滞后和采纳速度,在你设定的覆盖率和遵守率下运行;效应量是教学数值,应以证据替换。情景:关于未来的明示假设,不是预测。本页地图显示的是北极;模型本身不限于某一地点。

控制措施

结果的基线趋势
每年 2.0%
该工具的覆盖范围
70%
合规
75%
效应量,相对于教学取值
100%
未来年数
20 年

读数

期末时点降幅最大
监管
相对基线的降幅
21%
数字、方法与来源
年份基线监管经济激励信息与能力
0100.099.598.899.1
1102.0101.2100.199.8
2104.0102.5101.199.9
3106.1103.5101.6100.0
4108.2103.7101.8100.7
5110.4103.2101.7102.1
6112.6102.0101.6103.9
7114.9100.4101.6105.9
8117.299.2102.1108.0
9119.598.6102.9110.1
10121.998.9104.2112.3
11124.399.7105.7114.5
12126.8101.1107.4116.8
13129.4102.7109.4119.2
14131.9104.5111.4121.6
15134.6106.5113.5124.0
16137.3108.5115.7126.5
17140.0110.7118.0129.0
18142.8112.9120.4131.6
19145.7115.1122.8134.2
20148.6117.4125.2136.9

方法

  1. 政府工具 Hood (1983), The Tools of Government, Macmillan
  2. 胡萝卜、大棒与说教 Bemelmans-Videc, Rist and Vedung (1998), Transaction
  3. 创新扩散 Rogers (2003), Diffusion of Innovations, Free Press
  4. 不确定性扇形图(参数蒙特卡罗) Spiegelhalter, Pearson and Short (2011), Visualising uncertainty about the future, Science 333
  5. 单因素敏感性(龙卷风图) Saltelli and others (2008), Global Sensitivity Analysis: The Primer, Wiley

数据

The model runs on the teaching values set by the controls. To calibrate it for a place, read it against these admitted layers and series, which this page’s map can draw:

  • 边界 Natural Earth
  • 城市 Natural Earth
比较政策工具:规则、激励和信息。示意性教学模型:依据控件设定的数值运行,而非实测数据。方法:政府工具(Hood (1983), The Tools of Government, Macmillan);胡萝卜、大棒与说教(Bemelmans-Videc, Rist and Vedung (1998), Transaction);创新扩散(Rogers (2003), Diffusion of Innovations, Free Press)。
08决定

由谁决定,以及证据服务于什么。

Foresight Nexus 负责准备证据。以下决定由所列主管机构依据其自身规则作出,绝不由平台作出。

谁来决定问题本页面服务的证据
Cabinet offices and prime ministers’ strategy unitsWhether a national strategy holds across plausible futures, or needs contingent optionsScenario sets with their uncertainties and assumptions, wind-tunnel results and the signposts to watch
Central banks and prudential supervisorsWhich climate and macro-financial scenarios to use in supervisory exercisesScenario narratives, their parameter choices and their coverage of severe but plausible conditions
Ministries of defence and foreign affairsWhich capabilities and partnerships remain sound across alternative security environmentsAlternative futures with the drivers that separate them and the institutional responses each calls for
Energy ministries and system operatorsWhich investments hold across energy transition pathwaysPublished pathways compared on demand, technology and policy assumptions

该主题产生的产出

  • Foresight outlooks with scenario sets, drivers and assumptions stated
  • Scenario learning protocols for workshops and policy wind-tunnelling
  • Signpost registers that track which scenario conditions are emerging
  • Comparisons of scenario sets published by different institutions
09实施

从授权到评估,按支柱划分。

一项文书从授权到评估所经历的步骤,每一步都标明负责运行的支柱,以及仍由当局作出的决定。这是带有明示说明性数值的教学模型,不是预测。本页地图显示的是北极;模型本身不限于某一地点。

  1. 授权与问题界定 主管当局(计划之外)
    主管当局依其自身规则界定问题和授权。 Howlett、Ramesh 和 Perl(2009)
  2. 证据与系统模型 Foundry
    对系统及其反馈、数据和已说明的局限进行建模。 OECD (2014),原则 2
  3. 在情景下评估备选方案 Foundry
    在情景下比较各项政策工具,并显示不确定性。 Hood (1983)
  4. 与利益相关方演练 宇宙
    在演练中与将实施和承担这些方案的各方一起检验方案。 OECD(2014),原则 3
  5. 起草标准或指南 Nexus Standards
    行之有效的做法被编纂为标准或指南,并公开征求意见。 Nexus Standards 流程
  6. 由主管当局决定 主管当局(计划之外)
    主管当局在计划之外,依据记录在案的证据作出决定。 Howlett、Ramesh 和 Perl(2009)
  7. 能力与培训 Risk Academy
    负责实施的人员接受关于所决定文书及其数据的培训。 仙台框架(2015),优先事项 2
  8. 监测与公开报告 报告
    指标连同来源、局限和更正一并发布。 OECD(2014),原则 5
  9. 评估与修订 Nexus Standards
    结果反馈至标准和模型:循环闭合。 Howlett、Ramesh 和 Perl(2009)

方法

  1. 政策周期 Howlett, Ramesh and Perl (2009), Studying Public Policy, Oxford University Press
  2. 关键风险治理 OECD(2014),Recommendation of the Council on the Governance of Critical Risks
  3. 有向图的分层绘制 Sugiyama, Tagawa and Toda (1981), IEEE SMC 11
从授权到评估,按支柱划分:所记录的各个步骤及其所属支柱;来源按各步骤所引。
10核心问题

从业者提出的问题。

  • Which driving forces are both highly uncertain and highly important for the question at hand?
  • How many scenarios are useful, and how different should they be?
  • How can scenarios include surprises and discontinuities without becoming implausible?
  • How should quantitative models and qualitative narratives be combined?
  • How can scenarios be used to test strategies rather than simply describe futures?
11孪生与级联模拟器

Exercise a cascade in strategic scenarios with the people who decide.

Assembled from the Nexus Standards area profile 子孙后代与长期风险: the hazards it names, the 系统 and communities that carry the loss, the controls and institutions that dampen it and the data that observe it. Pick an initiating event and step through the cascade to see where mandates meet and which decisions fall to whom. The Map view places the run on an example geography with open data. Every weight is a stated assumption. An exercise for dialogue, not a forecast, an assessment or a position. To model a place of your own choosing, open the full System Builder.

灾害

  • Nuclear war
  • 溃坝
  • 金融传染
  • Cryptographically relevant quantum computer
  • 河流洪水(在下游引发)
  • Flash flood (set off downstream)
  • 大规模流离失所(在下游引发)
  • Nuclear detonation (set off downstream)
  • Health-system overload (set off downstream)
  • Data breach (set off downstream)
  • Mass account takeover (set off downstream)
  • Harvest-now, decrypt-later collection (set off downstream)
  • 大范围停电(在下游引发)
  • 供水短缺(在下游引发)
  • Sovereign debt crisis (set off downstream)
  • Currency crisis (set off downstream)
  • Nuclear winter (set off downstream)
  • High-altitude electromagnetic pulse (set off downstream)

控制措施

  • NS-0 章程与原则
  • NS-9 情境 UNI(部署、实例、计划实例)
  • NS-10 政策和条款(机器可读的义务:定义、约束、评估和执行)
  • NS-11 验证与监测(证据、证明、零信任符合性观测)
  • NS-13 标准制定流程(公开提案、审查、版本管理、采纳)
  • NRS-U12 宇宙 platform profile: Foresight Nexus
  • NRS-H26 危害类别:土地与湿地退化(NHS-1 eco.land)
  • NRS-H92 危害类别:老化与退化的基础设施(NHS-1 infra.ageing)
  • NRS-P4 前瞻、地平线扫描与战略
  • NRS-H11 危害类别:沿海与海平面危害(NHS-1 water.coastal)
  • NRS-H31 危害类别:持久性和生物累积性物质(NHS-1 poll.persistent)

观测

  • Our World in Data datasets (listed for reference)
  • CMIP6 气候预估(Copernicus Climate Data Store)(仅列作参考)
  • World Bank Open Data 和 World Development Indicators API(仅列作参考)
  • Number of countries with mechanisms in place to enhance policy coherence of sustainable development

示例地理范围

  • 孟加拉国:134 个六边形单元
  • 今夜夜间灯光与停电(VIIRS 昼夜波段),NASA GIBS
  • 穿透云层的地表水,30 m(OPERA DSWx-S1 雷达),NASA GIBS
  • 过去半小时降雨率(IMERG),NASA GIBS
  • 地表土壤湿度(SMAP),NASA GIBS
12机制

驱动因素与动态。

Scenario practice has deep roots in military planning and corporate strategy, where it helped organisations prepare for shocks that conventional forecasts missed. A common approach identifies the critical uncertainties, the forces that matter most and are least predictable, and builds contrasting futures around them. Other approaches start from a desired or feared end state and work backwards, or develop scenarios through participatory processes with stakeholders.

Scenarios change decisions when they are developed with the people who will use them, when they are challenging but plausible, and when they are used to test specific strategies. They fail when they are too close to the planning baseline an institution already uses, when one scenario is treated as the preferred future, or when they are produced by outsiders and handed over without engagement.

Why now: institutions face compound shocks that single forecasts did not anticipate, and scenario sets are increasingly used to test strategies. Foresight Nexus builds scenario sets with the people who will use them, and those scenarios set the conditions for Universe exercises, always labelled as scenarios.

13工具与承诺

How strategic scenarios is governed: instruments, mandates and commitments.

政策制定者、外交官或发展机构所使用的文书、授权、行为方和问责安排,并注明设定它们的协定。结构遵循所列框架。所绘制的任何状态或进展均为说明性,并非记录。

政策工具矩阵

The kinds of instrument available on strategic scenarios, by level of government and cooperation.

工具类型地方国家区域全球
监管型分区、建筑规范法律、标准、许可统一规则公约与条约
经济地方税费、拨款预算项目、税收、保险计划风险池,区域基金融资机制
信息地方预警披露、预警、统计数据共享安排全球监测与报告
制度型地方委员会牵头机构,协调理事会区域机构与秘书处多边授权
合作型社区协议伙伴关系契约谅解备忘录与联合计划协定与共同承诺
A typology after the OECD Recommendation on the Governance of Critical Risks; examples of instrument types, not an inventory of any country’s measures.
《仙台框架》(减少灾害风险) · 联合国减少灾害风险办公室《巴黎协定》 · 《联合国气候变化框架公约》《2030 年可持续发展议程》和可持续发展目标 · 联合国《国际卫生条例》 · 世卫组织
14方法与局限

如何开展。

  1. 01

    Driver analysis

    Structured identification of forces, ranked by importance and uncertainty.

  2. 02

    Narrative development

    Coherent, internally consistent stories that describe how each future could emerge.

  3. 03

    Quantified scenarios

    Models from 情景设计与压力测试 and complex 系统 and agent-based modelling add consistency and scale where data allows.

  4. 04

    局限

    Scenarios reflect the imagination and biases of those who build them, cannot be validated in advance, and can be misread as forecasts if not carefully labelled.

15方法

如何研究,以及方法无法说明的内容。

  1. 情景设计与压力测试探索性情景开发 · 政策风洞测试在此应用
  2. 不确定性下的决策分析稳健决策 · 动态适应性政策路径 · 结构化专家判断征询在此应用
  3. 复杂系统与基于主体的建模驱动因素的系统梳理 · 基于主体的社会变迁探索在此应用
  4. 预测与时间序列分析汇总判断性预测 · 概率性人口预测在此应用
17问题

问题与解答。

Why do scenarios not say which future is most likely?
Because their purpose is to test decisions against a range of futures, not to bet on one. Assigning probabilities invites planners to prepare for the likeliest case and ignore the rest, which is the failure scenarios exist to prevent.
How many scenarios should a set contain?
Practice commonly uses three or four: enough to span distinct futures, few enough to hold in mind. Sets built as a central case with variants tend to collapse into a forecast with sensitivities.
What is wind-tunnelling?
Testing an existing or proposed policy against each scenario in turn, asking whether it still achieves its aims and what would need to change. It turns scenarios from narratives into a check on strategy.
Are climate pathways the same as strategic scenarios?
They share methods but differ in purpose. Climate pathways quantify emissions and impacts for assessment; strategic scenarios explore the wider conditions an institution may face. Many exercises now combine both.
Why not just pick the most likely scenario?
Because scenarios are designed to test strategies across different futures. Choosing one defeats their purpose.
Are scenarios the same as stress tests?
They are related. A stress test applies a severe scenario to a system to see how it performs; scenarios more broadly explore how the future could unfold.
How many scenarios should there be?
Often three or four, enough to show real differences without overwhelming users, but practice varies with purpose.
由谁审查该主题的覆盖范围?
已发布的分析旨在由一位具名的主题审查人审查,引用其参考文献,并纳入独立专家的声音。当专家意见不一致时,如实报告分歧,而不是通过省略来消解分歧。
报告贡献

从本页贡献证据。

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.

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