System analyses and Design
What is system analyses?
Ans: Systems analysis is the process by which an individual (s) studies a system.
What is system analyses and design in (SDLC)?
Ans: System Analysis and System Design are two stages of the software development life cycle.
System Analysis is a process of collecting and analyzing the requirements of the system whereas
System Design is a process of creating a design for the system to meet the requirements.
What is system design?
Ans: Systems design is the process of defining elements of a system like modules, architecture,
components and their interfaces and data for a system based on the specified requirements.
What are the 5 phases of system analyses?
Ans: Systems analysis includes: initial investigation; systems survey; feasibility study;
determination of information needs and system requirements; and delivery of systems
requirements.
What is system design tools?
Ans: system design tools means software, spreadsheets, charts used in the design, installation,
testing, and maintenance.
DEFINING A SYSTEM A collection of components that work together to realize some objectives forms a
system. Basically there are three major components in every system, namely input, processing and
Initial investigation in system analyses.
Ans: This is the first phase of SDLC and is known as identification of need. This is a user's
request to change, improve or enhance an existing system. The objective is to determine whether the
request is valid or feasible.
What is testing
Ans: System testing is defined as testing of a complete and fully integrated software product.
This testing falls in black-box testing wherein knowledge of the inner design of the code is not a pre-
requisite and is done by the testing team.
What is System Testing?
System Testing (ST) is a black box testing technique performed to evaluate the complete system the
system's compliance against specified requirements. In System testing, the functionalities of the
system are tested from an end-to-end perspective.
Information Requirements Analysis is the process of defining the expectations of the users for an
application that is to be built or modified.
,Systems development is systematic process which includes phases such as planning, analysis,
design, deployment, and maintenance. we will primarily focus on −
Systems analysis
Systems design
Systems Analysis
It is a process of collecting and interpreting facts, identifying the problems, and decomposition of a
system into its components. System analysis is conducted for the purpose of studying a system or its
parts in order to identify its objectives. It is a problem solving technique that improves the system and
ensures that all the components of the system work efficiently to accomplish their purpose.
Analysis specifies what the system should do.
Systems Design
It is a process of planning a new business system or replacing an existing system by defining its
components or modules to satisfy the specific requirements.
Before planning, you need to understand the old system thoroughly and determine how computers
can best be used in order to operate efficiently.
System Design focuses on how to accomplish the objective of the system.
System Analysis and Design (SAD) mainly focuses on −
Systems
Processes
Technology
What is a System?
The word System is derived from Greek word Systema, which means an organized relationship
between any set of components to achieve some common cause or objective.
A system is “an orderly grouping of interdependent components linked together according to a plan to
achieve a specific goal.”
Elements of a System
The following diagram shows the elements of a system −
Outputs and Inputs
The main aim of a system is to produce an output which is useful for its user.
Inputs are the information that enters into the system for processing.
Output is the outcome of processing.
, Processor(s)
The processor is the element of a system that involves the actual transformation of input into
output.
It is the operational component of a system. Processors may modify the input either totally or
partially, depending on the output specification.
As the output specifications change, so does the processing. In some cases, input is also
modified to enable the processor for handling the transformation.
Control
The control element guides the system.
It is the decision–making subsystem that controls the pattern of activities governing input,
processing, and output.
The behavior of a computer System is controlled by the Operating System and software. In
order to keep system in balance, what and how much input is needed is determined by Output
Specifications.
Feedback
Feedback provides the control in a dynamic system.
Positive feedback is routine in nature that encourages the performance of the system.
Negative feedback is informational in nature that provides the controller with information for
action.
Environment
The environment is the “supersystem” within which an organization operates.
It is the source of external elements that strike on the system.
It determines how a system must function. For example, vendors and competitors of
organization’s environment, may provide constraints that affect the actual performance of the
business.
Boundaries and Interface
A system should be defined by its boundaries. Boundaries are the limits that identify its
components, processes, and interrelationship when it interfaces with another system.
Each system has boundaries that determine its sphere of influence and control.
The knowledge of the boundaries of a given system is crucial in determining the nature of its
interface with other systems for successful design.
Types of Systems
The systems can be divided into the following types −
Physical or Abstract Systems
Physical systems are tangible entities. We can touch and feel them.
Physical System may be static or dynamic in nature. For example, desks and chairs are the
physical parts of computer center which are static. A programmed computer is a dynamic
system in which programs, data, and applications can change according to the user's needs.
Abstract systems are non-physical entities or conceptual that may be formulas, representation
or model of a real system.
Open or Closed Systems
An open system must interact with its environment. It receives inputs from and delivers outputs
to the outside of the system. For example, an information system which must adapt to the
changing environmental conditions.
A closed system does not interact with its environment. It is isolated from environmental
influences. A completely closed system is rare in reality.
What is system analyses?
Ans: Systems analysis is the process by which an individual (s) studies a system.
What is system analyses and design in (SDLC)?
Ans: System Analysis and System Design are two stages of the software development life cycle.
System Analysis is a process of collecting and analyzing the requirements of the system whereas
System Design is a process of creating a design for the system to meet the requirements.
What is system design?
Ans: Systems design is the process of defining elements of a system like modules, architecture,
components and their interfaces and data for a system based on the specified requirements.
What are the 5 phases of system analyses?
Ans: Systems analysis includes: initial investigation; systems survey; feasibility study;
determination of information needs and system requirements; and delivery of systems
requirements.
What is system design tools?
Ans: system design tools means software, spreadsheets, charts used in the design, installation,
testing, and maintenance.
DEFINING A SYSTEM A collection of components that work together to realize some objectives forms a
system. Basically there are three major components in every system, namely input, processing and
Initial investigation in system analyses.
Ans: This is the first phase of SDLC and is known as identification of need. This is a user's
request to change, improve or enhance an existing system. The objective is to determine whether the
request is valid or feasible.
What is testing
Ans: System testing is defined as testing of a complete and fully integrated software product.
This testing falls in black-box testing wherein knowledge of the inner design of the code is not a pre-
requisite and is done by the testing team.
What is System Testing?
System Testing (ST) is a black box testing technique performed to evaluate the complete system the
system's compliance against specified requirements. In System testing, the functionalities of the
system are tested from an end-to-end perspective.
Information Requirements Analysis is the process of defining the expectations of the users for an
application that is to be built or modified.
,Systems development is systematic process which includes phases such as planning, analysis,
design, deployment, and maintenance. we will primarily focus on −
Systems analysis
Systems design
Systems Analysis
It is a process of collecting and interpreting facts, identifying the problems, and decomposition of a
system into its components. System analysis is conducted for the purpose of studying a system or its
parts in order to identify its objectives. It is a problem solving technique that improves the system and
ensures that all the components of the system work efficiently to accomplish their purpose.
Analysis specifies what the system should do.
Systems Design
It is a process of planning a new business system or replacing an existing system by defining its
components or modules to satisfy the specific requirements.
Before planning, you need to understand the old system thoroughly and determine how computers
can best be used in order to operate efficiently.
System Design focuses on how to accomplish the objective of the system.
System Analysis and Design (SAD) mainly focuses on −
Systems
Processes
Technology
What is a System?
The word System is derived from Greek word Systema, which means an organized relationship
between any set of components to achieve some common cause or objective.
A system is “an orderly grouping of interdependent components linked together according to a plan to
achieve a specific goal.”
Elements of a System
The following diagram shows the elements of a system −
Outputs and Inputs
The main aim of a system is to produce an output which is useful for its user.
Inputs are the information that enters into the system for processing.
Output is the outcome of processing.
, Processor(s)
The processor is the element of a system that involves the actual transformation of input into
output.
It is the operational component of a system. Processors may modify the input either totally or
partially, depending on the output specification.
As the output specifications change, so does the processing. In some cases, input is also
modified to enable the processor for handling the transformation.
Control
The control element guides the system.
It is the decision–making subsystem that controls the pattern of activities governing input,
processing, and output.
The behavior of a computer System is controlled by the Operating System and software. In
order to keep system in balance, what and how much input is needed is determined by Output
Specifications.
Feedback
Feedback provides the control in a dynamic system.
Positive feedback is routine in nature that encourages the performance of the system.
Negative feedback is informational in nature that provides the controller with information for
action.
Environment
The environment is the “supersystem” within which an organization operates.
It is the source of external elements that strike on the system.
It determines how a system must function. For example, vendors and competitors of
organization’s environment, may provide constraints that affect the actual performance of the
business.
Boundaries and Interface
A system should be defined by its boundaries. Boundaries are the limits that identify its
components, processes, and interrelationship when it interfaces with another system.
Each system has boundaries that determine its sphere of influence and control.
The knowledge of the boundaries of a given system is crucial in determining the nature of its
interface with other systems for successful design.
Types of Systems
The systems can be divided into the following types −
Physical or Abstract Systems
Physical systems are tangible entities. We can touch and feel them.
Physical System may be static or dynamic in nature. For example, desks and chairs are the
physical parts of computer center which are static. A programmed computer is a dynamic
system in which programs, data, and applications can change according to the user's needs.
Abstract systems are non-physical entities or conceptual that may be formulas, representation
or model of a real system.
Open or Closed Systems
An open system must interact with its environment. It receives inputs from and delivers outputs
to the outside of the system. For example, an information system which must adapt to the
changing environmental conditions.
A closed system does not interact with its environment. It is isolated from environmental
influences. A completely closed system is rare in reality.
