8606104
Beschreibung
Mindmap von camila abella, aktualisiert more than 1 year ago
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Erstellt von camila abella
vor mehr als 7 Jahre
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systems analysis
- what is system analysis ?
- the systems that we are talking about are the systems within
organizations and businesses, systems of communication,
financial systems, manufacturing systems , etc. Basically the
systems that make the organization or business work.
- the systems that we are talking about are the systems within
organizations and businesses, systems of communication,
financial systems, manufacturing systems , etc. Basically the
systems that make the organization or business work.
- research
- before the system analyst can make any
recommendations about a new system, they first have to
understand how the present system works
- questionnaires
- with large groups of people a questionnaire is a quick and
simple way to gather information.
- with large groups of people a questionnaire is a quick and
simple way to gather information.
- collecting information
- as much information about the present
system needs to be gathered as possible
- as much information about the present
system needs to be gathered as possible
- interviews
- the system analyst can interview key people within the
system to find out how it works
- the system analyst can interview key people within the
system to find out how it works
- collecting documents
- most businesses and organizations use documents to record information, or
to communicate information .
- most businesses and organizations use documents to record information, or
to communicate information .
- questionnaires
- before the system analyst can make any
recommendations about a new system, they first have to
understand how the present system works
- Designing
- System Inputs
- Process
- Data must be captured
- It can be manual or automatic
- It can be manual or automatic
- Data must be input to the
computer
- Data must be captured
- Types of methods to do the
data cature and data input
- Paper Forms
- They have spaces for numbers and text to
be written in. The data from this form
would then be typed into the computer
manually or by a OMR
- They have spaces for numbers and text to
be written in. The data from this form
would then be typed into the computer
manually or by a OMR
- Bar Code Reader
- Captures the numeric code that the
barcode represents. They are used
with POS systems and also
stock-control systems
- Captures the numeric code that the
barcode represents. They are used
with POS systems and also
stock-control systems
- Card Reader
- Cards contain data stored on a magnetic
strip or in smart cards which can be
captured with a card reader, they are
mostly used in systems such as EFTPOS
- Cards contain data stored on a magnetic
strip or in smart cards which can be
captured with a card reader, they are
mostly used in systems such as EFTPOS
- Camara
- It captures still
or moving
images which
can then be
input to a
computer for
processing
- It captures still
or moving
images which
can then be
input to a
computer for
processing
- Paper Forms
- Process
- On-screen Forms
- It should
have:
- *Have all of the necessary fields *Have obvious
places for user inputs *Use appropriate controls for
each field *Have text box controls that are the right
size for the data *Have easy-to-understand
instructions *Make good use of the screen area
available
- *Have all of the necessary fields *Have obvious
places for user inputs *Use appropriate controls for
each field *Have text box controls that are the right
size for the data *Have easy-to-understand
instructions *Make good use of the screen area
available
- Form Controls
- Text Box
- Normal text input
- Normal text input
- Buttons
- Perform an action
- Perform an action
- Option Buttons
- To select options
- To select options
- Check Boxes
- Select options
- Select options
- Drop-Down menus
- Select options from a list
- Select options from a list
- Text Box
- Validation and Verifications techniques
- Validation
- The computer checks that the data is sensible
- Presence Check
- Range Check
- Is the data value within a
set range?
- Is the data value within a
set range?
- Length Check
- Is an item of text too short
or too long?
- Is an item of text too short
or too long?
- Type Check
- Format Check
- Presence Check
- The computer checks that the data is sensible
- Verification
- To check that data is the
correct value
- Proof Reading
- After the data has been entered a person
compares the original data with the data in
the computer
- Advantages and Disadvantages
- Proof-reading is quick and simple, but
doesn’t catch every mistake.
- Proof-reading is quick and simple, but
doesn’t catch every mistake.
- Advantages and Disadvantages
- After the data has been entered a person
compares the original data with the data in
the computer
- Double-Entry
- The data is entered into the
computer twice
- Advantages and Disadvantages
- Double-entry takes more time and
effort, but it catches almost every
mistake.
- Double-entry takes more time and
effort, but it catches almost every
mistake.
- Advantages and Disadvantages
- The data is entered into the
computer twice
- Proof Reading
- To check that data is the
correct value
- Validation
- It should
have:
- System processes
- Data and File structures
- A data structure is an organised collection of
data, this will be some sort of database in
which data will be stored as it is being
processed
- Needs to concider
- *The type of data being stored *The
size of the data *The field names to
use How many records will need to
be stored
- *The type of data being stored *The
size of the data *The field names to
use How many records will need to
be stored
- Backing storage device and media
- *How often will the data need to
be accessed *How quickly the
data needs to be accessed *How
large will the data files be So, for
example
- *How often will the data need to
be accessed *How quickly the
data needs to be accessed *How
large will the data files be So, for
example
- A data structure is an organised collection of
data, this will be some sort of database in
which data will be stored as it is being
processed
- How the Data Will be Processed
- The system designer also needs
to design the actual steps to be
followed to processing the data
- The system designer also needs
to design the actual steps to be
followed to processing the data
- Data and File structures
- System Outputs
- On-Screen Reports
- The designer should consider
- *Show all of the necessary fields *Have fields that
are the right size for the data *Have
easy-to-understand instructions *Make good use of
the screen area available *Make good use of colours
and fonts to make the data clear
- *Show all of the necessary fields *Have fields that
are the right size for the data *Have
easy-to-understand instructions *Make good use of
the screen area available *Make good use of colours
and fonts to make the data clear
- The designer should consider
- Printed Reports
- The report needs to fit a piece of printer paper, it might also
include page numbers, a header / footer, etc
- The report needs to fit a piece of printer paper, it might also
include page numbers, a header / footer, etc
- On-Screen Reports
- System Inputs
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