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L.D.R      The organization of one output requested

To conclude this presentation of the L.D.R study, I will simply repeat the one of J.D. WARNIER and add as a reminder, the few rules already listed but which it is always worth remembering.

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J. D WARNIER:
"The aim of the preceding pages was to provide solutions to one of the most important problems in companies: To clearly formulate for themselves and others the data needs of the different people who  to ensure the functioning of the Of an undertaking or of one of the management units of which it is composed. "

When a problem becomes complex, as for example in choosing a company or a management unit taken as a repository:

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         (Bringing an important problem back to a series of restricted problems)

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The subdivision criterion used to organize all the S-Ds of the company or U-G studied is not imposed

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To subdivide the data set of a requested output, the criterion imposed is as follows:


A data set is subdivided if it comprises subsets present a number of times different from 1. In addition, a list of the elementary data (elementary data) present 1 time in the set must be given.

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Whatever the complexity of the problem to be solved in a hierarchical diagram, all will be solved by means of two elementary structures,
    - The so-called "repetitive" structure ie a set present (n times)
    - The so-called "alternative" structure ie a set present (0-1 times)

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Now that we have discovered the data to be stored in our computer system,  we have to determine the different containers (Sets) of these, in other words to set up the database of this system !.

                                                                                  And for that go to --->                                   or  

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