Databases Reference
In-Depth Information
Table 14.1
Definitions of Quality
Author
Definition of Quality
Crosby [4]
Conformance to requirements
Juran [5]
Fitness for purpose
ISO [6]
The totality of features and characteristics of a product or service
that bear on its ability to satisfy specified or implied needs
English [7]
Consistently meeting customers expectations
allows different features to be weighted according to the context or situation
under consideration.
We also have to take into account the distinction between product
quality and process quality (see Figure 14.1):
Data modeling
Data collecting
and loading
Process
quality
Data model
Data
N:M
No
mbr
e_i
(1,n)
(0,n)
Nombre_a
AUTOR
AUTOR
Trabaja
INSTITUCION
INSTITUCION
(0,n)
Product
quality
Escribe
N:M
Nombre_t
Databases
Identificativo
1:1
N:M
(1,n)
(1,n)
(0,n)
(1,n)
(1,1)
EJEMPLAR
EJEMPLAR
Tiene
Tiene
LIBRO
LIBRO
Trata
Trata
TEMA
TEMA
(0,n)
(0,n)
(0,n)
Fecha_p
Cod_libro
(0,n)
Presta
Presta
N:M
Edita
Edita
Consta
Consta
1:N
(0,n)
Fecha_s
Num_s
(1,1)
N:M
SOCIO
SOCIO
EDITORIAL
EDITORIAL
Nombre_e
Figure 14.1
Process quality and product quality.
