DCIT 24 (2nd Quiz) Flashcards
it is a set of related components that work together to accomplish defined objectives
system
it interacts with its environment and performs functions to accomplish objectives
system
it is like a physical system
information system
it manipulates data rather than a physical object
information system
it accepts data from its environment, process data and produces information for decision making
information system
it provides long-term memory for information systems
database
it also contains people, procedures, input data, output data, software, and hardware
information system
it is the traditional life cycle
the waterfall model
it contains sequential flow in which the result of each phase flows to the next phase
waterfall model
they produce a problem statement and feasibility study
preliminary investigation phase
they produce requirements describing processes, data, and environment interactions.
systems analysis phase
they use diagramming techniques to document processes, data, and environment interactions
systems analysis phase
they produce a plan to implement the requirements efficiently
systems design phase
they produce design specifications for processes, data, and environment interaction
analysts
they produce executable code, databases, and user documentation
systems implementation phase
they produce corrections, changes, and enhancements to an operating information system
maintenance phase
it commences when an information system becomes operational
maintenance phase
it is fundamentally different from other phases because it comprises activities from all the other phases
maintenance phase
it ends after deploying a replacement system and retiring the current system
maintenance phase
they perform life cycle phases for subsets of a system
spiral development methodologies
they progressively produce a larger system until the complete system emerges
spiral development methodologies
they delay producing design documents until requirements are clear
rapid application development methodologies
it is the scaled-down versions of a system
prototypes
it can be implemented rapidly using graphical development tools for generating menus, forms, reports, and other code
prototypes