Preliminary Design

Preliminary Design of a SI

It consists in designing an information system that satisfies the requirements, functions and restrictions established in previous phases.

Preliminary and detailed design

• What is a Prototype?

A prototype is a limited representation of the design of a product that allows the parties responsible for its creation to experiment, test it in real situations and explore its use. 

A prototype can be anything from a piece of paper with simple drawings to a complex software.

• What is its utility?

Because they are useful for communicating, discussing and defining ideas between designers and responsible parties. They support the work by evaluating products, clarifying user requirements and defining alternatives.

1) Definition of Purposes 

• Elaborate Different Purposes
• Evaluate existing configuration
• Determine necessary technical configurations

2) Select Purposes

• Carry out a cost-benefit analysis
• Discuss purpose report
• Acquire technology Necessary

3) Refine Purpose 

• Refine Purpose
• Review Purpose
• Prepare a preliminary design report
• Prepare a report on the details of the next phase. Steps of the detailed design of inputs and outputs of an Information System

 Preliminary and detailed design

1) Design Entries : L as input specifications describe how data entered into the system for processing.

2) Design of a File System: The systems ofinformation in companiesthey are oriented to the use of files and databases.

3) Design of specifications for programs: In this stage, the application programs are designed.

4) Design of Procedures: It is the design of the process that will be carried out for the analysis of the data. 5) Design of security controls: The tasks of security supervision and / or privacy of the data are carried out.

6) Output Design : They are the results and information generated by the system.