File Management System
In practice, an Organization is managing their Business Information with Manual
File System. The Manual File System is form with Collection of File Folders and
Paper Documents. Every File Folder Label Name is indicating the File Content Type
Information. Each File Information has Relationship with other File Information.
Management Information Report is generating from Manual File Information. Even today,
this concept is working fine.
In the traditional Application Development Environment (1950 - 1970), every Business
Information categorized and stored in the Computer System like Data File and maintain
through Application Code File. Computer Manufacturer Company provided Computer Operating
System to track the Application Code and Data File based on the File Location and
File Name. This is called File Management System. File Management System does not
have Intelligence Process that created Data Security, Data Maintain Cost, Data Redundancy,
Data Inconsistency and Data Anomaly Problem to maintain Information in the Data
File.
Data Security
Data File can manage from Customize Application or Generic Word Processing Application.
Management Information Report was generating from Data File Information through
Customize Application or Word Processing Application. Operating System provided
Read and Hidden File Attribute to protect Data File from Application End User. In
the File Management System, Data File Protection was Low.
Data Maintain Cost
The Structure of Data File was maintained through Customize Application Code. The
Structure designed with Field Name, Field Type, Field Size and Delimiter Character
of the Record. An instance, in the COBOL Program Language, File Description (FD)
Section provides to maintain the Structure of the Data File. This idea was complex
to maintain Structure of Data File to Add Field or Delete Field or Update Field
Type or Field Size. An instance, in the Sales Management System, when introduce
a new Tax Field, the developer updated Sales Event Related Application Code and
then maintain the Legacy Data File into New Data File.
According to the Business Operational workflow, time to time, the programmer needs
to update the Application Code and update Data File Design with new requirement.
Due to time constraint, the programmer focused to the current problem and may be
they failed to focus the entire system data flow. Instead to concentrate to develop
a New Application Code, most of the developer was concentrate to Maintain Exiting
Application Code to manage Data File. In the File Management System, the Application
Maintain Cost was HIGH.
Data Integrity Problem
In the traditional Application Development, an Organization Business Process de-composed
into different Departments and developed different Application for each Department.
Data File was designed through each Department Manual File Content or Paper Form
Documents. An instance, Sales Management Application was designed with Customer,
Product, Supplier, Employee and Invoice Transaction Data Files. An Account Management
Application was designed with Customer, Product, Supplier, Employee, Account Head
and Account Transaction Data Files. One Application Data File was not shared with
other Application Data File and Data Redundancy, Data Inconsistency and Data Anomalies
problem was created.
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