Types of System Requirements

To simplify the system analyst in determining keselurnhan needs in full, then the analyst needs the system divides into two types. The first type is the functional requirements. Functional needs is the kind of demand that contains any processes that will be performed by the system. Functional requirements also contain any information that should be there and produced by the system. The second type is nonfunctional requirements. This requirement is a requirement type that contains a property that is owned by system behavior, include:

1. Operating
In this section we have explained technically how the new system will operate. Platform system used is defined, whether using Windows or Linux for example. To develop a software system is also determined. Specific hardware required is also determined. The system architecture is also described, whether the 2-tier, 3-tier, or the other.

2. Performance
In this section explain how good the performance of software developed to process data, display information, and complete the overall business process at hand. Efficiency and software are also included.

3. Security
Contains a statement about the security needs of the application of security mechanisms, data, and transactions to be implemented on the system. Password system is used will be as to what specific hardware and software for security systems are also described.

4. Politics and Culture
Needs regarding the contents or associated with political and cultural issues specified in here. Fill in the politically and culturally should be guaranteed not to cause a negative perception of the system.

Service System

Service system have different characteristics from other types of services. Entanglement between rapidly evolving technologies, methodologies and knowledge absorption capabilities for managing the delivery of service very closely. Difficulty to identify the needs of users, the diversity of types and characteristics of information system services that are not possible generalization, increase the complexity of the service.

The key to success in service user satisfaction lies in how the Information Systems Unit Information System to manage human resources and methodology used in his ministry. Management of these factors properly, will produce an information system services that are reliable, accurate, timely, effective and able to contribute adequately to the organization secatra whole.

To measure user satisfaction with both required a measurement instrument that is not only appropriate, but also have high quality.

Here are some criteria for quality assessment in which a system can be said to be bad:

1. The system produces a product that is not accurate.
2. The system produces products that are not consistent.
3. The system produces a product that is not trusted.
4. The system is easy to learn.
5. The system is easy to use.
6. System is awkward to use.
7. The system is flexible.

Efficiency Analysis

Efficiency concerns how to generate as much output with minimum input. Here is an indication that a system can be said to be inefficient:

1. Much time is wasted on the activities of human resources, machines, or computers.
2. Data is input or copied to excess.
3. Data processed in excess.
4. Information is generated in excess.
5. Effort required for these tasks are too excessive.
6. Material required for these tasks are too excessive.

Control Analysis

Business tasks need to be monitored and corrected if found sub-standard performance. Control system installed to improve performance, prevent, or detect system errors, ensure data security, information, and requirements. The things to note are:

1. Security or controls are weak

• Input data is not edited enough.
• Crime (eg, embezzlement or theft) of the data.
• Ethics violations in the data or information. For example, data or information accessible to people who do not berwenarig.
• Data stored in redundant, inconsistent in the files or different databases.
• Breach of data privacy rules or guidelines.
• An error occurred while processing (by humans, machines, or software).
• An error occurred while making a decision.

2. Excessive control or security.

• Bureaucratic procedures slow down the system.
• Control of excessive disturbing customers or employees.
• Excessive control causing delays in processing.

Economic Analysis

Economic reasons is perhaps the most common motivation for a project. Basic foundation for most managers is the cost or dollars. Economic issues and opportunities related to problem costs. As for the things that can be listened to note the following:

1. Cost

• The cost is not known.
• Costs can not be traced to the source.
• The cost is too high.

2. Profit

• New markets can be explored.
• Marketing can now be repaired.
• Orders can be improved.

Information Analysis

Information is a crucial commodity for end users. Evaluation of the ability of information systems to produce useful information needs to be done to address the opportunities and deal with problems that arise. In this case did not improve the quality of information by increasing the amount of information, because too much information will actually create new problems. Situations that require increased information include:

1. Decision or lack of information about the current situation.
2. Lack of relevant information about the current situation or decision.
3. Lack of timely information.
4. Too much information.
5. Informasj inaccurate.

Information can also be a focus and a restriction or policy. While the system output check information analysis, data analysis examined the data stored in a system. Problems faced include:

1. Redundant data. The same data is captured and / or stored in many places.
2. Stiffness data. Data captured and stored, but organized in such a way that the test report and can not or hard to do.

Performance Analysis

Performance problems occur when the business tasks that run did not achieve the target. Performance is measured by the number of production and response time. Total production is the amount of work can be completed during the specified period. In the marketing section, the performance is measured by the volume of work, which gained market share, or corporate image.

Response time is the average delay between a transaction with the response given to the transaction.

PIECES Analysis

To identify problems, to do an analysis of performance, information, economic, security applications, efficiency, and customer service. This guide is known as the PIECES analysis (performance, information, economy, control, eficiency, and services). And analysis are usually obtained some major problems. This is important because it usually appears on the surface is not a major problem, but only a symptom and a major problem only.

Problems in Information Systems

Problems in information systems is a condition or situation that aberrant and targeted information systems, even deviant and objectives of the organization or company, such as decreased performance, information ineffective, or information systems are not secure. Usually the problem is expressed in the question, for example:

1. Is this information system can improve performance?
2. Is the information systems can reduce costs?
3. Is the information systems can enhance security?
4. Does the information system can menumnkan waste?
5. Does the information system can increase sales?
6. Does the information system can improve the service?

Goals and Limitations of Information System

Target information system is improved performance, increased the effectiveness of information, decrease costs, increase application safety, increased efficiency and improved service to customers. Deviation and sixth goals are what caused the problems in information systems. System is the environmental constraints that limit the application, for example, the regulations who can use the system, and who should not.

Problem Identification

At this stage of system analysis, the analyst defines the task memunyai system problems, perform feasibility studies, and analyzing systems needs to be developed. There are three key questions to be answered, namely:

1. What a problem to be solved by information system?
2. What causes the problem?
3. Who would be the end-user system?

Problem is the system analyst who studied the problems facing users. By studying this problem, the analysts work with users to get a rough problem. The steps that must be addressed:

1. Defining the scope and objectives.
2. Defining the problem facing the user.
3. Identifying the cause of the problem and the decision point.
4. Identifying the end user.
5. Select the priority handling of the problem.
6. Estimating costs and benefits roughly.
7. Make a report defining the problem.

Important Meaning of Analysis Phase

Lots of good information systems users eventually abandoned because the system did not have anal sex is a true understanding of the organization. Objectives and systems analysis is to avoid this condition, by answering the following questions:

1. Who will use the system?
2. The system developed will be like what?
3. What can the system work?
4. When the system will be used?

Analysis phase itself will be divided into several stages of analysis in more detail, namely the old system weaknesses analysis, analysis of the needs of the new system, and a feasibility study covering technical feasibility, operational, economic, legal, organizational, and schedules. In the analysis of weaknesses of the old system, the focus of analysis adalab old system will be replaced with the new system. Analyses were performed to identify the weaknesses in business processes and ensure that there is a new system can overcome these weaknesses. Having compiled a list of weaknesses, the new system needs analysis conducted. In this analysis the need for new information systems are defined and proposed. Needs of proposed and tested its feasibility with several feasibility studies such as technical feasibility, technical, operational, economic, legal, organizational and schedules. If the need for the proposed feasibility study passed the stage of design can be implemented and system specifications are defined.

Analysis is an early stage in the development of systems and is a fundamental step that will determine the quality of the information system is developed. Information system analysis is divided into three stages of analysis: weaknesses in the system is running, needs a new system and the feasibility of the system which includes engineering feasibility, legal, economic, operational, and others.

Object Oriented Analysis (OOA)

For 30 years, most have separate systems development approach to knowledge (data) and processes. The technique removes the object appears to separate the separation of data and process it. In contrast, the specific data and processes to create, read, update, or delete data that is integrated into the construction of the so-called data or objects. The only way to create, read, update, or delete data is by means of the attachment (embeded) called OOA method is a technique driven models that integrate data and processes are called objects. OOA models are pictures that illustrate the system objects and a variety of perspectives, such as structure, behavior, and interasi between objects. The most famous example is the UML (Unified Modelling Language).

Engineering Information And Data Modeling

Engineering information first focused on the structure of data stored on a system. So tell the us data centered. Data models in engineering is called an entity relationship information.

Engineering information is said to center on the data because of stress on learning and analysis of data requirements prior to the requirements process. It is based on the level of confidence that the data and knowledge is a resource company that should be planned and maintained. As a result, analysts describe the raw data into a model of entity relationships, and then create a data flow diagram that describes the processes that occur. Engineering information modeling is actually trying to synchronize data with the modeling process. The difference lies only in structured analysis modeling process is described first, and data modeling.

Analysis of Structured

First is one of the first formal approach to the analysis of information systems. This analysis focuses on data flow and business processes and software. This analysis is called procces oriented structured analysis simple in concept. Analysts describe the series of processes in the form of data flow diagrams (data flow diagram) that describes the processes that exist or are proposed together with the input, output and file them.

Model Driven Approach Analysis

Model Driven is an analysis that uses images to combine to the problems, requirements, and solutions business solutions. Examples of commonly used model is the flowchart and DFD. Examples and analysis with a model driven approach is:

1. Structured Analysis
2. Engineering Information
3. Object-oriented Analysis

Information System Analysis

This is the first phase in the development phase in the development of information systems that primarily focused on the problems and requirements of business, separate and any technology that can or will be used to implement a solution to the problem. The main objectives and analysis of information systems there are a few things, namely:

1. Determine the weaknesses and the business processes on an old system to be able to determine the need and the new system.
2. Determine the feasibility of the new system requirements review and in some aspects, including economic, technical, operational, and legal.

Definition of System Design

System design is a problem-solving techniques that complement each other (with the systems analysis) are reassembling the component parts into a complete system-hope, an improved system. This involves the addition, deletion, and changes relative to the initial system (the original).

In the design of process models and data models, to realize the system needs are defined and a framework for coding was also determined. Documentation and design stages will be very useful for system development in the future, if there are changes and user needs.

Defination System Analysis

Systems analysis is a collective term that describes the early phases of system development. Systems analysis is a technique that describes the problem solving component parts to learn how well the component parts work and interact to achieve their goals. Systems analysis is the earliest phases of system development is the foundation of the success of the resulting information system will be.

This stage is crucial because it determines the form of systems to be built. This stage may be an easy step if kiien very familiar with the issues facing the organization and knows very well the functionality and information systems to be created. But this step could be the most difficult stage when kiien not identify the need for bias or closed to outsiders who want to know the details of its business processes.