Car Evaluation
Abstract
Derived from simple hierarchical decision model, this database may be useful for testing constructive induction and structure discovery methods.
Purpose
Additional Information Car Evaluation Database was derived from a simple hierarchical decision model originally developed for the demonstration of DEX, M. Bohanec, V. Rajkovic: Expert system for decision making. Sistemica 1(1), pp. 145-157, 1990.). The model evaluates cars according to the following concept structure: CAR car acceptability . PRICE overall price . . buying buying price . . maint price of the maintenance . TECH technical characteristics . . COMFORT comfort . . . doors number of doors . . . persons capacity in terms of persons to carry . . . lug_boot the size of luggage boot . . safety estimated safety of the car Input attributes are printed in lowercase. Besides the target concept (CAR), the model includes three intermediate concepts: PRICE, TECH, COMFORT. Every concept is in the original model related to its lower level descendants by a set of examples (for these examples sets see http://www-ai.ijs.si/BlazZupan/car.html). The Car Evaluation Database contains examples with the structural information removed, i.e., directly relates CAR to the six input attributes: buying, maint, doors, persons, lug_boot, safety. Because of known underlying concept structure, this database may be particularly useful for testing constructive induction and structure discovery methods.
| Name | Role | Type | Description | Missing |
|---|---|---|---|---|
| Buying | Feature | Categorical | buying price | No |
| Maint | Feature | Categorical | price of the maintenance | No |
| Doors | Feature | Categorical | number of doors | No |
| Persons | Feature | Categorical | capacity in terms of persons to carry | No |
| Lug Boot | Feature | Categorical | the size of luggage boot | No |
| Safety | Feature | Categorical | estimated safety of the car | No |
| Class | Target | Categorical | evaluation level (unacceptable, acceptable, good, very good) | No |
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