# Simulation Types

A simulation uses a [Digital Twin](/more-details/digital-twin.md), which is RootCause's runnable causal model of your business, to answer a specific kind of question. Each simulation type runs on the same underlying twin but is configured for a different purpose: predicting outcomes, testing interventions, finding optimal inputs, diagnosing anomalies, and more.

This section has one page per simulation type, covering when to use it, how to set it up, and how to read the result. For the seven-step workflow that produces a Digital Twin in the first place, see [Step 6: Run Simulations](/user-guide/simulations.md).

## The seven types

Static Digital Twins support seven simulation types.

| # | Type                                                                                           | Question it answers                                                  |
| - | ---------------------------------------------------------------------------------------------- | -------------------------------------------------------------------- |
| 1 | [Prediction](/more-details/digital-twin/summary_of_digital_twin_simulations/prediction.md)     | What outcome is most likely for a specific input?                    |
| 2 | [Intervention](/more-details/digital-twin/summary_of_digital_twin_simulations/intervention.md) | What happens if we change variable X?                                |
| 3 | **Optimization** *(coming soon)*                                                               | What combination of inputs best achieves our goal?                   |
| 4 | **Best Action** *(coming soon)*                                                                | What is the minimum change needed to reach a target outcome?         |
| 5 | **Exploration** *(coming soon)*                                                                | How does the target respond as one variable sweeps across its range? |
| 6 | **Root Cause Analysis** *(coming soon)*                                                        | What caused this specific observed outcome?                          |
| 7 | **Anomaly Scan & Diagnosis** *(coming soon)*                                                   | Which records are anomalous, and why?                                |

Temporal Digital Twins add two more: Forecast and Temporal Intervention. Both are also coming soon.

Until each dedicated page is live, the existing [Step 6: Run Simulations](/user-guide/simulations.md) page has working coverage of every type.


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