1. increasing importance in developing information systems, namely:
-the irregularity in the old system and the growth of the organization
to-reach opportunities
-the instructions
2. the purpose of developing information systems:
-improvement of the performance of the new system which will be most effective
-improvement of the quality of information presented
-increase of the cost benefits of going
-to increase control and improve the mistakes that will occur
-improvement of work efficiency
-improvement of the services provided by the system
3. increasing importance in developing information systems, namely:
-the irregularity in the old system and the growth of the organization
to-reach opportunities
-the instructions
4.principles of system development
- system is developed for management
system must be able to support the needs that are required by management.
- system developed is a large capital investment
systems that need to be developed capital big especially with the sophisticated technology pliers. so, any capital investment must consider two things that all alternatives should be investigated and the best investment that must be valued.
- systems that need to be developed that people educated
people involved in the development and use of the system must merupkan where educated people are educated people who do not need formal training but can work through in order to overcome the problems and possible solutions.
- stages of work and tasks that must be made in the process of system development
systems generally involve several phases and involves the work of personnel in some form of team mengerjakannya.pengalaman to show that without the planning and coordination work that both the system development process will not be successful with a satisfactory
- development process does not need to order
phases of work performed in accordance with the steps undertaken, the steps can dilakuan the bersamaan.example: the process of procurement of hardware do not mean the process of the other stopped, but the design can be done depends on the existence of other hardware.
- do not be afraid to cancel the project.
cancel a project is a project that pantangan.untuk already tudak longer feasible to be done with the firm that does not take much time and money. - documents must have in the development of guidelines for the system.
documentation should be made at the time of the process of developing the system itself is still in the process because of this documentation can be produced from the work of each step in the development of the system
5. Main Phase: Planning: (Why Develop System?) Analysis: (Who, what, when and where the system?) Design: (How does the system work?)
Implementation: (How System Installed / installed?) Planning: Identifying Business Value Analysis Feasibility Make Managing Staff Work Plan and Navigate Project Control Analysis: Analysis
search for information related to the system model Define the process data model Defining Design on Physical Design Process
Design System Architecture Design Interface Design Database Design Files and Program Implementation: Construction instalation
6. system development approach
- classical approach, structured approach to the opponent.
· classical approach, namely the development of systems that follow the stages in the life cycle system provided with tools and techniques are adequate.
problems that arise from this approach:
1. software development will be difficult
2. treatment or maintenance system will be expensive
3. possibility of system error
4. success of the system less secure
5. problems in the implementation of the system
· structured approach.
structured approach includes tools and techniques needed in developing the system so that the final results of the system will be developed in the system structure with well defined and clearly
- approach to approach the opponent piece system.
· approach is a piece of the system development approach emphasizes the application of a particular activity or course
· system approach is the approach that considers information systems as one integrated unit for each activity or application
- approach under-ride down on the opposite approach.
· ride-down approach first level of organization that is under the operational level where the transaction is done
· top-down approach starting from the top level of the organization-level planning strategy
- comprehensive systems approach to modular approach to the opponent.
· approach is a comprehensive system approach to develop the overall system simultaneously.
· modular approach to try to solve a complex system into several parts or modules so that a simple system will be more easily understood and developed
- approach leap away develop opposite approach.
· approach to implementing changes leap away thorough simultaneously using advanced technology.
· approach to developing advanced technology to apply only to applications that require it at the time and will continue to be developed for the period of the next-period requirement in accordance with the existing technology
7. metedologi is the methods used by a science, art or other disciplines.
method is a systematic way to grind
algorithm is a sequence of problem-solving procedures
- development of the classification methodology.
1. functional decomposition methodologies
This methodology emphasizes the solution of the system into subsystem-subsystem is more kecilsehingga will be more easy to understand groups, namely:
HIPO, Stepwise, and information hidding
2. Data-oriented methodologies
This emphasizes the methodology of the data to be processed.
group, namely:
a.data flow oriented methodologies
based on the solution of the system into modules based on the type of data elements and behavior logic in the module in the system group that is SADT, composite design and SSAD
b.Data stucture oriented methodologies
emphasize the structure of the input and output in the system, namely group JSD and W / O
c.Presscriptive methodologies
group, namely:
ISDOS-perangjat software is developed for mengotomatisasi information system development process
PLEXSYS-transformation is a computer language statement to a high-level executable code for a hardware configuration and the desired
-PRIDE is an integrated software for the analysis of both structured system.
-SDM/70 Is a software contains a collection of methods and guidelines to assist the administration to develop an effective system
-Spectrum is a system development methodology that was developed and marketed by a U.S. company
-SRES was developed by TRW for the SDS from the air force american union
-pescriptive some other methodologies such as DBo, PAD, HOS, MSR and PDL - tools to develop a system that is:
1. HIPO
2. Data Flow
3. SADT diagram
4. Warnier / Orr
5. Jakson's diagram - techniques used to develop a system that is:
1. techniques project management
This technique is used for project scheduling
2. techniques find facts
techniques that can be used to collect data and find the facts in activities to learn the system that have
3. techniques cost analysis
4. techniques to run a meeting
5. techniques inspection - differences and system analyst pemogram
-system-analyst is a person who analyzes the system to identify a reasoned solution.
analyst responsibility system not only on making a computer programme but only on the system as a whole.
knowledge systems analyst must be knowledgeable, not only on the computer technology but only in the field of application the job systems analyst in making the programme limited to solving the line big.the job analyst relations involve many people.
-programmer is a person who write code for an application programme based on the particular building design have been made by the system analyst.
programmer's responsibility limited to the making of the program is quite limited computer.sciences programmers on technology komputer.Pekerjaan programmers are technical and must be precise in making instructions programme.The job programmers dont the people
Tidak ada komentar:
Posting Komentar