Creating Scenarios
This article explains how to create scenarios in Model Reef.
You will learn:
How scenarios are represented as separate models.
How to create new scenarios from an existing base case.
How to name and organise scenario models in your workspace.
1. Scenarios as separate models
In Model Reef:
Every scenario is a full model with its own branches, variables, drivers and Data Library.
There is no scenario dropdown inside a single model file.
You create scenarios by duplicating models and changing assumptions.
This keeps each scenario isolated and easier to audit and reason about.
2. Creating a scenario from a base model
Typical workflow:
3. What is copied when you create a scenario
When you duplicate a model, Model Reef copies:
Branch structure.
All variables and timing settings.
All drivers and Data Library entries.
All imports (Xero, QuickBooks, PDF, Excel, CSV, ticker data).
All dashboards and custom reports.
All valuation settings and assumptions.
The scenario starts identical to the base at the time of duplication, then evolves independently.
4. Organising scenarios in the workspace
To keep scenarios manageable:
Group related scenarios in a single folder.
Use clear naming such as
Base,Downside,Upside,Stress.Include the planning year or project in the name, for example
FY25orProject Alpha.Optionally keep a separate folder for archived or superseded scenarios.
Good organisation makes it obvious which model corresponds to which scenario.
5. When to create a new scenario
Create a separate scenario model when:
You want materially different assumptions (growth, pricing, cost, capex, funding).
You are preparing clearly defined cases for stakeholders.
You want to test structural changes without touching the base model.
You need distinct valuation assumptions, capital structures or risk cases.
Small tweaks can be handled within one model. Larger narrative changes merit a dedicated scenario.
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