# Workflow\.createRun()

The `.createRun()` method creates a new workflow run instance, allowing you to execute the workflow with specific input data. This is the current API that returns a `Run` instance.

## Usage example

```typescript
await workflow.createRun();
```

## Parameters

**runId?:** (`string`): Optional custom identifier for the workflow run

**resourceId?:** (`string`): Optional identifier to associate the workflow run with a specific resource (e.g., user ID, tenant ID). This value is persisted with the workflow run and can be used for filtering and querying runs.

**disableScorers?:** (`boolean`): Optional flag to disable scorers for this workflow run

## Returns

**run:** (`Run`): A new workflow run instance that can be used to execute the workflow

## Extended usage example

```typescript
const workflow = mastra.getWorkflow("workflow");

const run = await workflow.createRun();

const result = await run.start({
  inputData: {
    value: 10,
  },
});
```

## Using resourceId

The `resourceId` parameter associates a workflow run with a specific resource, such as a user or tenant. This is useful for multi-tenant applications or when you need to track which user initiated a workflow.

```typescript
const workflow = mastra.getWorkflow("workflow");

// Create a run associated with a specific user
const run = await workflow.createRun({
  resourceId: "user-123",
});

const result = await run.start({
  inputData: {
    value: 10,
  },
});

// Later, retrieve the run and access the resourceId
const storedRun = await workflow.getWorkflowRunById(run.runId);
console.log(storedRun.resourceId); // "user-123"
```

## Related

- [Run Class](https://mastra.ai/reference/workflows/run)
- [Workflows overview](https://mastra.ai/docs/workflows/overview)