DV concept

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The DP concept (detailed data processing concept ) or IT concept is a continuation of the technical concept in the creation of databases or in programming . It describes the relevant data and their processing . The information determined in the technical concept is adapted to the respective database or programming language . The tasks from the technical concept are structured and documented with regard to the data structures and processing steps.

Analogously, a DP concept (see also EVA concept ) includes :

  • Description of the input data
  • Description of the output data
  • Documentation of processing steps , d. H. Description of the processing algorithms that transform the input data into the output data.

If there are several processing steps, the above procedure is repeated for each of these transactions. For this purpose, a data processing concept contains an overview of the data model, e.g. B. ER diagram .

Description of the data model

The description of the data model contains the essential data elements and tables e.g. B .:

  1. How are the fields named?
  2. What data types do the fields have, what length?
  3. What are the primary keys?
  4. What links are there between the fields?

This information is usually presented in extensive tables. A reference to an interactive data dictionary is useful for larger volumes.

Description of the processing steps

For larger projects, processing is first broken down into applications or modules. These units are then divided into individual processing steps , e.g. B. transactions , jobs, program runs, etc. The sequence of these processing steps can be fixed by the program or later determined by the program user.

The individual processing steps each document:

  • the relevant input data
  • the data results to be achieved
  • the logical form of processing

In an accounting system, the processing steps should be B. be documented in a way in which they can be understood by a specialist user without programming knowledge. The traceability of the data results usually represents an essential part of the acceptance of the delivery objects .

The description of the data processing takes place as text in prose form with reference to the technical names of the data elements or as pseudocode . Alternatively, the UML activity diagram can also be used .

Subsequent phases

The IT concept is a detailed specification of the necessary data and data transformations and forms the basis for the subsequent implementation phase .

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