To summarise in an index the existence or absence of household installations and services, we have aggregated scores assigned to each installation or service and the characteristics which we have considered fundamental.
From this aggregation we extract an index whose value tells us the degree of comfort or welfare which a family dwelling might possess or produce.
The assignation of scores for each family home was as follows:
1.For all family dwellings:
1 Has only 1 bathroom: | 2 |
Does not have heating but has a mobile or fixed appliance to increase temperature: | 1 |
Built between 1945 and 1975: | 1 |
Has hot water: | 1 |
Has heating: | 2 |
Has 2 or more bathrooms: | 4 |
Built after 1975: | 2 |
Has a telephone: | 3 |
Has piped gas: | 3 |
2. For occupied family homes |
Between 19.4 and 45.8m2 per person: | 1 |
Over 45.8m2 per person: | 2 |
Between 0.27 and 1.05 persons per room: | 1 |
Fewer than 0.27 persons per room: | 2 |
3. For empty family homes |
Between 4 and 6 rooms: | 1 |
7 or more rooms: | 2 |
Between 61 and 150 m2: | 1 |
Over 150 m2: | 2 |
In order to compare with the 1991 results, when we included facilities such as electrical energy and kitchen, 3 points are assigned to each dwelling. According to these scores, the maximum total a dwelling may reach is 23. To obtain a simpler treatment the scores were converted to a base of 100.
We consider that a dwelling has a low comfort index when it does not reach 50 points, medium comfort when it scores between 50 and 75 and high when it scores higher than the latter figure.