interface with display and report forms and the rest of the system or Graphical User Interface GUI.
The decision making process adopted to solve semi-structured spatial problems is often perceived as unsatisfactory by decision makers. Densham
1991 lists the distinguishing capabilities and functions of SDSS, which should be capable of providing mechanisms for the input of spatial data, allowing
representation of the spatial relations and structures, including the analytical techniques of spatial and geographical analysis and providing output in a variety
of spatial forms, including maps.
2.3. INFORMATION SYSTEMS
An information system is a group of components that interact to produce information. The minimal information system consists of people, procedures, and
data Kroenke, 1989. According to Kroenke 1989, a good information system consideration if characteristics of it have been fulfilled such pertinence, timelines,
accuracy, reduced uncertainty, and element of surprise. An information system is an organized combination of people, hardware,
software, communications networks, and data resources that collects, transforms, and disseminates information in organization O’Brien, 1999. The components
of these information systems describe on Figure 2.3. There are five components of information systems such as data resources, hardware resources, software
resources, network resources, and people resources.
Figure 2.3. Information system components O’B rien, 1999 According to O’Brien 1999, people resources include end user people
who are use an information systems or the information it produces and IS specialist people who develop and operate information systems. Hardware
resources include all physical devices and materials used in information processing. Software resources include all sets of information processing
instructions. Data is more than the raw material of information and includes wide variety of data type, how the data be organized database and knowledge bases.
Network resources emphasize that communication network are a fundamental resource component of all information systems and include communication media
and network support Mulyarto, 2003. The conducting of this research considering on IS components, i.e.
software resource, data resource, and network resource. Data resource is one of vital aspect that have to manage carefully consider to the quality and validity of it.
Network resource concern to the security of networking include of data transfer
security, communication firewall, etc. As Mulyarto 2003 state that software resource concept included the sets of operating instructions programs, and the
sets of information processing instructions needed by people procedures.
2.4. SYSTEM DEVELOPMENT
