System Analysis and Design in Montreal, Quebec. Information System Online
An information system
is an arrangement of people, data, processes, interfaces, and geography that are
integrated to support and improve the day-to-day operations in a business, as well as
fulfill the problem-solving and decision-making information needs of managers. Information
system fulfill the following basic purposes:
Transaction processing systems capture and process data about (or for) business transactions.
Management information systems provide essential management reports required to plan, monitor,
and control business operations.
Decision support systems provide users, especially managers, with decision-oriented information
in response to various unstructured decision and problem-solving opportunities.
Expert systems capture and simulate the knowledge and expertise of subject matter experts so it
may be applied by nonexperts.
Office information systems automate a wide variety of routine and complex office activities through
improved work flow and communications between workers.
Personal information systems improve an individual worker's productivity through application of
personal computing technology.
Work group information systems enhance the ability of groups of workers to collaborate and communicate.
System analysis and design
focuses on four models in order
to develop a successful information system.
Data - representations of business data that must be captured and stored in the
information system's database.
Process - representations of the business functions and processes that must be
optimized and supported by the information system's computer programs.
Interfaces - representations of how the information system will interact
with end-users and other information systems.
Geography - representations that lead to the distribution of data, processes, and
interfaces to multiple business operating locations.
System analysis
is the dissection of a system into its component pieces to study
how those component pieces interact and work.
System analysis
stages
- (1) The survey and planning of the system and project,
- (2) the study and analysis of the existing business and information system, and
- (3) the definition of the business requirements and priorities for a new or improved system.
Systems design
is the evaluation of alternative solutions and the specification of a detailed computer-based solution.
Joint application development
(JAD) uses highly organized and intensive workshops to bring together system owners, users, analysts,
designers, and builders to jointly define and design systems.
Information System Development
stages include
System Analysis,
Data Modeling,
Process Modeling,
Network Modeling,
System Design and Construction,
Application Architecture and Process Design,
Database Design,
Input Design and Prototyping,
Output Design and Prototyping,
User Interface Design and Prototyping,
Software Design,
Object-Oriented Design,
System Implementation,
System Support.