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chapter 1 (system development life cycles activities (1.planning (to find…
chapter 1
system development life cycles activities
1.planning
to find out the scope of the problems and determine the solutions .resources cost, time , benefits and other items should be considerd here.
2.analyse
the second phrase, the team analyse the needs of the project or solution. either it will meet their expectation.
3.design
this phrases describes in detail the necessary specification, features and operations.
4.development
time where the works begin
5.testing
involves system integration and system testing
6.implementation
when the project is put into production by moving the data and component from the old system
maintenance
user cand fine tune the system .we can add new capabilities or meet additional user requirements
transaction processing system (tps)
definition
operational -level system at the bottom of the pyramid
usually operated directly by shop floor workers or front line staff,provide the key data required to support the managment of operations
functions
input: simple data processing system
processing :validation/details report /actions report/summary report
output:list/details report/ action report/summary report
example
payroll system ,order processing system
role of TPS
produce information for other system
used by operational personnel + supervisory levels
efficiency oriented
managment information system(MIS)
definition
used by middle managers to help ensure the smooth running of the organizations in the short medium term.
The highly structured information provide by system allows manager to evaluate an organization's prformance by comparring current with previous output
function
input:internal transaction/internal files/structured data
processing:sorting/merging/summarizing
output:details report/action report /summary report
example
sales managment system,inventory control system
role of MIS
based on internal informations flows
support relatively structured desicions
inflexible and have title analytical capacity
desicion support system(DSS)
definition
used by senior manager , which facilitates the creaction of knowledge and allow its integrations into the organizations
used to analyze existing
function
input:internal transaction/ internal files/external information
processing:modelling/simulations/analysis/summarizing
output:summay report /forecast/graph/plots
example
logistic system
financial planning system
role of DSS
have analyctical and/modelling capacity
support ill:structured or semi -structured decisions