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L.C.S              organizing data in a computer system

What is left for us to do ?

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Discover the set of Primary Logical Files (FLP) contained in each of the logical bases defined in subdivision level 3 of the B set, of logical bases.

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Definition of a logical basis:

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A base x is a set of data comprising a subset of data concerning the firm, a subset of data concerning the third parties in relation to the company, their exchanges with the company and the object of these exchanges.

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Here is the subdivision of a base:

At this stage of the study, (discovery of the set B of the logical bases of our system), it is of course out of question to study all the bases (it would be much too long), we have to work only on the Bases concerned by the outputs requested by the users. We have seen with L.D.R that we have discovered the external movements necessary to the outputs and therefore to store in our system.

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As a result, we need to establish a table of correspondence between thr logical bases and external mouvements, which will tell us on what basis (s) we need to work on as a priority.

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Here is a simplified example of a table of correspondaence  (Bases <-> M.E)

Until now it is of a disconcerting clarity not ?

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