# Tutorial: Create a qualification requirement that workers have achieved at least 80% accuracy on previous tasks
<a name="CustomQualTutorialAccuracy"></a>

In the following example, we create a qualification type that we can use to record how well workers did on a previous set of tasks and then build a qualification requirement that requires them to have achieved at least 80% accuracy. In this approach, we start by posting a set of HITs to which we already know the answer. When workers respond to these HITs, we can track their responses against the known answers and assign them a score as a qualification. 

To start, we use the [https://docs.aws.amazon.com/AWSMechTurk/latest/AWSMturkAPI/ApiReference_CreateQualificationTypeOperation.html](https://docs.aws.amazon.com/AWSMechTurk/latest/AWSMturkAPI/ApiReference_CreateQualificationTypeOperation.html) operation to create the type with which we want to work. 

```
{
  Name: 'Task Scores', 
  Description: 'Score on previous tasks,
  QualificationTypeStatus: 'Active'
}
 
```

The `CreateQualificationType` operation returns an ID, 3TL87MO8CLOFYXKXNRLM00EXAMPLE, that we can assign to workers. For each worker, we call the [https://docs.aws.amazon.com/AWSMechTurk/latest/AWSMturkAPI/ApiReference_AssociateQualificationWithWorkerOperation.html](https://docs.aws.amazon.com/AWSMechTurk/latest/AWSMturkAPI/ApiReference_AssociateQualificationWithWorkerOperation.html) operation to record the score they achieved on the earlier tasks. In the example below, we record that the worker was 93% accurate on the test HITs. 

```
{
  WorkerId: 'AZ3456EXAMPLE',
  QualificationTypeId: '3TL87MO8CLOFYXKXNRLM00EXAMPLE',
  IntegerValue: 93
}
```

Now that we've built our group, we can reference it in the `QualificationRequirements` for our HITs as shown below. 

```
QualificationRequirements: [
  {
    QualificationTypeId: '3TL87MO8CLOFYXKXNRLM00EXAMPLE',
    Comparator: 'GreaterThanOrEqual',
    IntegerValues: [80]
  }
]
```