Information and Communication Technology Seminar, Vol. 1 No. 1, August 2005
ISSN 1858-1633 2005 ICTS 86
DECISION SUPPORT SYSTEM FOR STOCK INVESTMENT ON MOBILE DEVICE
Ivan Satria, Dedi Trisnawarman
Departmet of Information System, Faculty of Information Technology Tarumanagara University,
Jl. Letjen S.Parman No.1, Jakarta Barat Telp : 0215671747, Fax : 02156941924
Email : kn1ght7idyahoo.com , dedi_tryahoo.com
ABSTRACT
The Purpose of this final project is to help to forecast or predict stock investment value on the
mobile device that has a high flexibility and mobility to connect to the data banks internet. The module
that created are data selection module, technical analysis module and the result module. This modules
are part of decision support system, for giving information to predict the development of stock
values in the future. The programming language that used for design the module is PHP and MySql for the
database, for the interface in the mobile device is created using Java 2 Micro Edition J2ME that have
the ability to run on mobile device that support Java. The decision support system for stock investment on
mobile device is design to help user in stock investment by providing the future possible growth of
the stock value according to the user input to the system. This system also designed to help user to
analyze the movement track record of a stock and can be used as an information system of a stock current
value. Keywords : DSS, J2ME, Mobile device, Stock, Web.
1. INTRODUCTION
Decision making cannot be separate in our daily life, decision making especially in a crucial matters
could be fatal if there is no data to analyze the possible condition of the decision.
Human has been facilitated to obtain some information in compliance of information technology
improvement. Nowadays, the needs on information had made easier because of the appearance of
internet, which allow us to transfer the information in just few seconds. Time and space is no longer as
obstacles. This compliance has made advantage for those who are far from source of information.
Internet Interconnected Network is a network that connects computers in the whole world, and
made possible communication data between computers that already connected into that network.
Internet is use by many formals and in formals organizations to spread any information through
public. Internet act as a media to deliver fast information. Newest information can be spread
through the internet. Internet is one of the media to search and transfer data that connect the entire
computer network around the globe. Internet has grown into an information sending media. Internet
also provides all the information and data that could be crucial in decision making.
However this, internet as an accessible network still have its own weakness especially in the access to
the internet it self. But with the fast growth of the mobile device technology, this problems could be
solved.
The mobile device concept is not meant to replace the function of the internet, in the contrary it is the
extension of the internet itself, which through this device the internet is more accessible and can follow
the highly mobility user. So this application can help user to help user in decision making to provide data
and information access especially when the internet access is limited of not available.
This application use stock as the object of data with consideration that stock value is changing
rapidly, therefore the needed data for decision making in stock investment would be the latest value of the
stock.
2. BASIC THEORY 2.1. Decision Support System
Decision support system is a computer based system that designed as a helping tool for all the
management level in decision making by simulating or predict the possible decision options results so the
management can choose alternative action to get the expected goals. Decision Support concept is stressed
on the effectifness, not on the efficiency of decision making . [1]
2.2. Investment
An investment is a commitment of funds made in the expectation of some positive rate of
return[2]. Investment and speculation usually including assets purchasing in reliance to get profit
form the increasing price[3].
Decision Support System for Stock Investment on Mobile Device – Ivan Satria Dedi Trisnawarman
ISSN 1858-1633 2005 ICTS 87
2.3. Stock
Stock is valuable papers that used as an ownership proof of a company, usualy stock used as a media
for the commpany to gain more capital and expand their business.[4]
2.4. Prototyping
Engineer appliance is determination and using the engineer principal in order to get the trusted
application, economic, and work efficiently in computer. To engineer the software need a systematic
approach, this called prototyping.
The software design is a result of hardware development and system design. Prototyping method
gives strong basic control to the software development, to develop a high quality and controlled
software. The systematic steps of prototyping approach in software development are :
1. Data Gathering
Search and collecting data needs for creating, designing database and to identify problems.
2. Temporary design Create a blueprint of the design software to
gives images of the objects and the software format for input and output.
3. Prototype Building The temporary design is collected and arrange
into a computer language. 4. Prototype Evaluation
Makes evaluation on software output to identify if the result is suitable with the expected
outcome. This phase also conducted to all the function.
5. Product Making Is the last phased in prototyping method, where
the full software is created.
2.5. System Design
The Decision Support System for Stock Investment on Mobile Device designed in 2 parts,
first is the web application that used as the data gather and data store for the stock value, currency exchange
value, inflation rate value. The decision support mathematical models calculation also take place on
the web. The web application used to ensure the stock data used in the calculation is the latest data. The
second part of the application is the mobile device application side that used as an interface to
communicate to the web application.
2.6. Database Model
