Points in acquiring information system is
- Planning for and justifying IT Applications.
- Strategies for Acquiring IT Applications.
- The Traditional System, s Development Life Cycle
- Alternative Methods and Tools for Systems Development.
- Vendor and Software Selection
The Traditional Systems Development Life Cycle
System development life sycle (SDLC), a system development methods traditionally used to carry out large-scale information technology projects. There are 6 phases of the SDLC, namely:
- System Investigation
Early stages of the traditional SDLC is a system investigation. System investigation describes the various business issues or business opportunity, by using a feasibility study. Feasibility study, analyze which of the three the best solution according to their business problems, three the solution is as follows:
a. Do not do anything, and keep using the existing system, without any change.
b. Modify or develop a system that is already running.
c. Building a new system.
There are three (3) types of feasibility study, namely:
Technical feasibility, determine whether the company to build or acquire the hardware, software and communication components needed to solve business bermasalahan.
Economic feasibility, determine whether the project has a financial risk that can be handled, and the organization has the time and cost to complete the project.
Behavioral feasibility, related to human problems in the system development project
After a feasibility analysis is done, then the decision "Go / No-Go" by the "steering committee", done.
- System Analysis
While the construction project was approved by the entire members, the stage system analysis can be performed. System analysis, identify any issues that businesses planned by the organization to be able to be solved by the use of information systems. The main objective of this stage is to gather information about the current system, in order to determine the need for the addition of new systems development or system.
- System Design
System design, describes how a system can solve business problems. At this stage made technical system specification, which can be broken down as follows:
- System output, input and user interface.
- Hardware, software, databases, telecommunications, personnel and procedures.
- Blueprint of how these components are integrated.
- Programming & Testing
Programming, relating to the translation of the design specifications, into computer code. While testing is a process that aims to check whether the computer code will produce the desired results. It is also aimed at detecting errors, bugs contained in the coding.
- Implementation
Implementation is the process of transition from the old system to the new system. There are four types of conversion strategy, namely:
- Direct Conversion. The old system is stopped and the new system is run at the same time.
- Pilot Conversion. Introducing a new system in one part of the organization, for example, in one functional area.
- Phased Conversion. Introducing a component of a new system, for example the individual modules.
- Parallel Conversion. This strategy has been used by organizations rare, where the old system and the new system is used on an ongoing basis from time to time
- Operation & Maintenance
Once implemented, the new system will operate in a certain period of time until the system no longer meets the desired objective of the company. The system requires maintenance. The first type is debugging. Debugging is a process that is continuously taking place in the system. Then the second is the maintenance, updating the system to accommodate changes in business conditions. The third type is the maintenance of the addition of new functionality without disrupting operations.
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