|
(a)Name one tool that is used to plan and manage projects.[1 mark
]
Gantt Charts.[1 mark ]
(b)When a new system is designed,the analyst sets the objectives
by considering a number of factors.Describe each of the following
factors:
(i)Capacity.[2 marks ]
(ii)Control.[2 marks ]
(iii)Information accessibility.[2 marks ]
(iv)Complexity.[2 marks ]
(i)Capacity is concerned
with the ability of the current system to meet the basic objectives
and purpose of the system (1 mark).The system should have sufficient
capacity to support processing, storage,and retrieval (1 mark).
Other valid answers should also receive credit.
[2 marks ]
(ii)Control relates to a set of mechanisms that ensures that the system
carries out all its activities properly (1 mark).Controls can be applied
to procedures, content, audit and responsibility (1 mark).
Other valid answers should also receive credit.
[2 marks ]
(iii)Information accessibility determines whethe or not the information
that is required to perform a task is available and retrievable (1
mark).It also determines whether or not it is reliable (1 mark).
Other valid answers should also receive credit.
[2 marks ]
(iv)Complexity is concerned with designing systems that are free of
unnecessary steps or activities (1 mark).This can be achieved by simplifying
the process, partitioning,or resequencing it (1 mark).
Other valid answers should also receive credit.
[2 marks ]
(c)Describe each of the following options fo system development,and,in
each case, indicate when it is suitable to adopt that approach:
(i)End-user development.[2 marks ]
(ii)Institutional development.[2 marks ]
(iii)Outsourcing.[2 marks ]
(i)End users having
4GL software knowledge develop systems to meet their functional needs
(1 mark).End-user development is used in a situation when the information
needed is localised and is required for an individual department (1
mark).
Other valid answers should also receive credit.
[2 marks ]
(ii)IS professionals are engaged to develop systems for organisational
use (1 mark).
It is used in a situation where the organisation wants to have a competitive
edge and a specialised IS would help in the process (1 mark).
Other valid answers should also receive credit.
[2 marks ]
(iii)An external party is consulted to develop systems for an organisation
(1 mark).
It is used when it is cheaper to outsource than invest on IS/IT esources
(1 mark).
Other valid answers should also receive credit.
[2 marks ]
|