Phase Design

Design phase are the phases of change is still a concept needs to system specifications are nil. Stages of system design can be divided into two stages, namely the logical design (logical design) and the stages of physical design (physical design). As for differences, and both can be described as follows:

Logical design
Logical design is the design phase of the SDLC and where all the functional features and analysis phases of the system chosen and described separately and later on the computer platform used.

Results and these phases are:
a. Functional description of the data and processes that exist in the new system.
b. A detailed description and specification of systems, including:

• Input (what data is to be input).
• Output (what information is being output).
• Process (what are the procedures that should be executed to transform inputs into outputs).

Logical design phase usually produces several documents, including document data model, process model document, the draft table, hierarchy between modules, to interface design and systems that will be created.

Physical design
In this section, the logical specification is converted into the detail of technology where programming and system development can be resolved. At this stage the activity and the coding is done The output of this system are:

a. Technical description, the choice of software technology and hardware used.
b. A detailed description and specification of the system include:

• Program modules
• The files
• Network Systems
• System software

At the design stage, there are some major activities carried out, namely:

1. Design and integrate the network.
2. Designing the application architecture.
3. Designing the user interface.
4. Designing the system interface.
5. Designing and integrating the database.
6. Create a prototype for detail and design.
7. Designing and integrating the control system.