---
title: Modeling Quality
categories: demo
toc: false
...

Defining quality attributes.

* basic feature with `cost` and `mass`.

```clafer
abstract Feature
    cost: integer
    mass: integer
```

* feature that impacts `comfort`

```clafer
abstract ComfortFeature : Feature
    comfort: integer
```

* feature that impacts `fuel` consumption

```clafer
abstract FuelFeature : ComfortFeature
    fuel: integer
```

[Modeling Quality 2]()