Databases for Production Management by R. Companys, P. Falster, J. L. Burbidge

By R. Companys, P. Falster, J. L. Burbidge

Facing many elements of the layout, implementation and operation of databases for creation administration structures, this ebook offers learn that's vital to all these shortly all in favour of the computerisation of creation administration.

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D. MURR, C l a u d i o WALTER J o s e Ì . V. d e CASTILHO, TO C l e s i o S . d o s SANTOS a n d U n i v e r s i d a d e F e d e r a l do Rio Grande do Sul C u r s o d e P o s g r a d u a c a o em C i e n c i a d a C o m p u t a c a o PO Box 1 5 0 1 - CEP 9 0 . 0 0 1 Porto Alegre RS BRAZIL The p a p e r p r e s e n t s a method and a s e t of t o o l s f o r t h e automated design of d a t a b a s e s f o r n o n c o n v e n t i o n a l a p p l i c a t i o n s , b a s e d on a conceptual modelling approach, which follows t h e E-(for Entity) model.

1 . Introductio n Th e objectiv e of Informatio n System s modellin g is th e representatio n of ou r knowledg e abou t th e portio n o f interes t of th e rea l world . Thi s representatio n ca n b e don e usin g eithe r a conceptua l mode l o r a logi c model . Th e forme r is declarativ e an d define s th e Informatio n Syste m (IS ) independentl y o f its interna l structure . Th e latte r is procedura l an d define s th e IS in term s o f th e neede d operations . 42 As will b e explaine d in sectio n 2 , conceptua l modellin g ca n b e classifie d int o operationa l an d deductive .

The p r o d u c t i o n management t e r m s are defined in [8]. A " p a r t " can be a "purchased p a r t " o r a "manufactured p a r t " . A " p a r t " is represented by the "part number", the "part description" and the "inventory". A " p u r c h a s e d r e q u i s i t i o n " i s d e s c r i b e d by " p u r c h a s e d part", "due date" and "purchase quantity". The graphical representation d i f f e r e n c e b e t w e e n t h e f i r s t component t y p e and t h e o t h e r s means t h a t the " p u r c h a s e d p a r t " e x i s t s i n d e p e n d e n t l y o f a " p u r c h a s e r e q u i s i t i o n " .

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