> ## Documentation Index
> Fetch the complete documentation index at: https://docs.airelabs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Cases

> Project modeling always involves uncertainty.

## Cases in Aire

Many values—like prices, system design choices, or financial assumptions—aren’t fixed. Rather than commit to a single input, Aire lets you define multiple **cases** for any [term](/docs/terms) or [block](/docs/blocks).

Cases are named options that represent different possible values or structures. They allow you to reason through ambiguity, model what’s known and unknown, and compare outcomes—all without duplicating your model.

## What is a Case?

A case is an alternate value or configuration attached to a [term](/docs/terms) or [block](/docs/blocks). You might define cases like:

* `low`, `base`, and `high` for a price or efficiency
* `battery_base` vs `no_battery` for a system design
* `aggressive` vs `conservative` for cost or incentive structures

Each case reflects a distinct modeling assumption. Case names are local to each block—there’s no global list—so different parts of the model can express uncertainty in ways that match their logic.

## Where Cases Are Used

Cases can be applied to:

* **[Terms](/docs/terms)** – to express alternate values for a single variable
* **[Blocks](/docs/blocks)** – to represent different configurations or logic paths

They’re modular, transparent, and don’t require duplicating formulas or restructuring your model.

## How Cases Connectto Scenarios

Scenarios are built by selecting specific cases for different [blocks](/docs/blocks) in the model.

For example:

* One scenario might use the high case for electricity price and the no\_battery case for storage
* Another might use the base case for inputs and the battery\_base case for a bundled system design

This lets you explore structured combinations of assumptions, analyze risk, or build defensible narratives for project partners and investors.

## What Cases Enable

Cases are central to Aire’s modeling system. They allow you to:

* Represent uncertainty without hardcoding or duplication
* Model divergent assumptions across different parts of the system
* Run side-by-side comparisons and structured scenario analysis
* Reflect the probabilistic, evolving nature of project development
* Make models easier to debug, communicate, and update over time

Cases help you go from "what’s the number?" to "what are the possible futures?"—and make decisions with a clearer view of what’s at stake.