The following are some of the phases in the systems development life cycle (SDLC): system analysis, system design, system implementation, system review and maintenance. State four activities that are carried out during the system implementation phase.

The following are some of the phases in the systems development life cycle (SDLC): system analysis, system design, system implementation, system review and maintenance. State four activities that are carried out during the system implementation phase.

(b) Give three reasons why system maintenance phase is necessary in SDLC.
(c) State two instances where observation is not a viable method of gathering information during system analysis stage. 
(d) Various considerations should be made during input design and output design.

State two considerations for each case. 

• Input design.
• Onput design.

(e) State two reasons why an organisation may use other strategies of software acquisition other than developing their own. 

RESPONSES

(a)(i) Activities (system implementation)

•  File conversion system change over.
•  Training, construction, installation.

(ii) System construction stage.

•  Coding
•  Module testing

(b)System maintenance stage is necessary

• Correct the errors that may have escaped during the design.
•  To meet the changes in technology.
•  Changes in government policy. ‘
•  Changes in operating environment e.g. the system evolving (e.g . when a, newer  version of software is released). 

(c)Observation not viable method of gathering information:

• Distance = when data is to be collected from a far place. if the people to be observed must be aware that they are being observed.
• When the situation is risky for the observer. 

(d)Input design:

• Data capture method.
• Input interface, between user and the system e.g. form.
• Volume of input.
• Frequency of input. 
• Output design
• Form of output designed e.g. hard/soft copy.
• Output layout.
• Purpose of output. 

(e)Other strategies other than system construction:

• Constrained by time.
• Constrained by cost
• Constrained by human resource.
• Legal requirements.

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