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Design, Testing and Changeover (System Design (Hardware, Data, File…
Design, Testing and Changeover
System Design
Hardware
Data
File structure
Fields and tables
input and output methods
design of information systems
design of networks and transmission issues
topology
protocols
personnel issues
staff training
security processes
if personal data is being stored it needs to be registered with the information commisioner
testing
Alpha testing
testing is done by the developing company but not by the team who made it
beta testing
testing is done by customers in exchange for constructive criticism tests the usability
acceptance
tested by the customer to see if it meets requirements
system implementation
purchase and isntallation of hardware
modifying software
changing code
installing new software or hardware
creating databases
training staff
changeover methods
direct
big bang method
system is implemented all at once on a certain date
cheap to implement
new system ma not be used to by staff so they need to be trained
parallel
run both systems at the samer time
safest option
expensive
phased
new system is introduced part by part
can take a long time
expensive
staff can get used to it
problems fixed quicker
pilot
introducing system to certain areas of the company
no backup in that area
staff in the scheme can train other staff#