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GCRI · علم سامانه‌ها و مدل‌سازی

تحلیل تصمیم برای مدل‌سازی

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.

01ثبت‌خانه

Decision analysis for modelling on the record.

Method recordSTEM method
  1. روشتحلیل تصمیم در شرایط عدم قطعیت
  2. Applied inسامانه‌ها Science and Modelling
  3. داده3 inputs
  4. Canonical pageSTEM Commons
02Application

What decision analysis under uncertainty does here.

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 ریسک سامانه‌ای 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.

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.

Value of information for models

The expected improvement in a decision from reducing a model uncertainty is estimated before investing in further model development.

Communicating model results for decisions

Results are presented as consequences of options under uncertainty, with ranges and assumptions, rather than single predictions.

03روش‌ها و شواهد

How decision analysis for modelling is modelled, measured and tested.

مدل، مفروضات، داده‌ها و عدم قطعیت آن، به شکلی که دانشمند یا مهندس بررسی می‌کند. ساختارها از روش‌های منتشرشده پیروی می‌کنند. مقادیر ترسیم‌شده تبیینی‌اند، نه یافته.

مدل، معادلات و مفروضات

The model structure used for decision analysis for modelling, the assumptions it makes and how each is tested.

ریسک عنصر iRi = f(Hi, Ei, Vi, Ci)مخاطره، مواجهه، آسیب‌پذیری و ظرفیت مقابله
زیان سالانهٔ مورد انتظارEAL = ∑k pk · Lkبر رویدادهای k با احتمال سالانهٔ pk
سامانه‌های جفت‌شدهxt+1 = A xt + B ut + εtA carries the couplings, u the shock, ε the error
فرضچرا ساخته می‌شودچگونه آزموده می‌شود
مخاطره و مواجهه در یک رویداد مستقل‌اندانتگرال زیان را تحت‌کنترل نگه می‌داردمقایسه با برازش مفصل بر سوابق مشترک
جفت‌شدگی‌ها نزدیک نقطهٔ کار خطی‌انداجازه می‌دهد شوک‌ها از طریق A منتشر شوندفراتر از دامنهٔ خطی آشفته کنید و مقایسه کنید
منحنی‌های آسیب‌پذیری میان مکان‌ها منتقل می‌شوندمنحنی‌های محلی به‌ندرت در دسترس‌انداعتبارسنجی در برابر زیان‌های مشاهده‌شده در جاهایی که وجود دارند
ورودی‌ها
مجموعه‌داده‌های نسخه‌دار با خاستگاه
خروجی‌ها
توزیع‌ها، هرگز تک‌رقم‌ها
کد
منتشرشده با کارت مدل و آزمون‌ها
بازتولید
همان داده، کد، محیط و بذر
فرمول‌بندی‌های استاندارد ریسک و فضای حالت؛ مفروضات فهرست‌شده نمونهٔ روش‌اند، برای داوری بیان شده‌اند و نتیجه نیستند.
اصول راهنمای FAIR · GO FAIR و FORCE11W3C PROV · کنسرسیوم وب جهانیGuidance on consistent treatment of uncertainties · IPCCCEOS Analysis Ready Data · Committee on Earth Observation Satellites
04داده

What the method consumes.

Datasets and records used by decision analysis under uncertainty on this platform, with the role each plays and the label its values carry. Sources are listed in the source register.

دادهنقشبرچسب
Elicited objectives and optionsFramingDECLARED
Model outputsConsequencesمدل‌سازی‌شده
Uncertainty estimatesValue of informationبرآوردشده
05فرایند

نحوهٔ اجرای فرایند.

Process explorer · Process

Decision analysis for modelling: Hazard, exposure, vulnerability

10 steps4 مرحله

فرایند

Decision analysis for modelling: Hazard, exposure, vulnerability

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.

  1. 01 Drivers

    1. 01مخاطرهDataset · Model stewardThe potential occurrence of a natural or human-induced physical event or trend that may harm people, property, services or ecosystems.
    2. 02مواجههDataset · Model stewardThe presence of people, livelihoods, species, ecosystems, infrastructure or assets in places and settings that could be adversely affected.
    3. 03حساسیتDataset · Model stewardThe degree to which a system or species is affected, either adversely or beneficially, by climate variability or change.
    4. 04Capacity to cope and adaptDataset · Model stewardThe ability of سامانه‌ها, institutions, humans and other organisms to adjust to damage, take opportunities or respond to consequences.
  2. 02 Assessment

    1. 05Risk from responsesComponent · Model stewardRisks from climate responses arise when responses miss their objectives, or from trade-offs or negative side effects.
    2. 06آسیب‌پذیریComponent · Model stewardThe propensity or predisposition to be adversely affected. It includes sensitivity to harm and lack of capacity to cope and adapt.
    3. 07ریسکModel · Systems Science and ModellingRisk results from dynamic interactions between hazards and the system’s exposure and vulnerability. Each may be uncertain and change.
  3. 03 Response

    1. 08Risk management and responseStep · Model stewardRisk management is plans, actions, strategies or policies that reduce the likelihood or size of adverse consequences.
    2. 09ریسک باقیماندهRecord · Model stewardThe climate impact risk that remains after adaptation and mitigation efforts. Adaptation can redistribute risk between areas and groups.
  4. 04 Decision

    1. 10Decision by the responsible partyDecision · Model stewardThe framing names no single decision maker. Decisions on responses rest with the responsible party under its own rules.

Outline of an external standard or method, from its public sources. It describes what the framework says, not a record of any run. It does not show that Nexus or any partner performs, certifies or approves a step. A gate is a step of the method, never a Nexus approval.

06اعتبارسنجی

How results are checked.

Analyses are checked through sensitivity analysis, peer review and stakeholder scrutiny. Retrospective review compares decisions with outcomes.

بررسیHow it is done
Decision relevance reviewModelling plans are reviewed for relevance to the decision
Sensitivity of choiceAnalysis tests whether uncertainty changes the preferred option
Communication testingResult presentations are tested with intended users

Results depend on elicited probabilities and preferences that may be biased. Deep uncertainty can make expected value comparisons misleading.

08تولیت

Who maintains the method.

مدیریت ریسک سامانه‌ای stewards decision analysis under uncertainty for the Consortium and reviews how it is applied across platforms.

09متصل

جایی که این صفحه در سراسر کنسرسیوم به آن می‌رسد.

10پرسش‌ها

پرسش و پاسخ.

What are the limits of decision analysis under uncertainty in this field?
Results depend on elicited probabilities and preferences that may be biased. Deep uncertainty can make expected value comparisons misleading.
How are results checked?
Analyses are checked through sensitivity analysis, peer review and stakeholder scrutiny. Retrospective review compares decisions with outcomes.
Are the values on this page real?
The data names, roles and checks are real descriptions of practice. The canvas shows a design of the method’s use, not a run; no result is reported here.
Where else is this method applied?
رصدخانهٔ canonical method page lists every platform that applies it.
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گزارش‌ها 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.

GCRIعلوم سامانه‌ها و مدل‌سازیروش‌ها و فنیسناریو و آزمون تنش
علوم سامانه‌ها و مدل‌سازی

یک روش، یک مجموعه‌داده یا یک پرسش بیاورید.

اطلاعات و درخواست‌ها امروز باز است. هر درخواست یک شمارهٔ پیگیری می‌گیرد و گام بعدی را مشخص می‌کند؛ درخواست‌های عضویت، پرداخت‌ها، تخصیص رایانش و ثبت‌نام‌ها تنها زمانی باز می‌شوند که تیم، شرایط و ظرفیت داوری آن‌ها فراهم باشد.