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1.4) Making Decisions
• The next stage in the system development cycle is making decisions.• The data gathered in the preliminary investigation is used to develop one or more potential solutions.• The constraints of the problem are also factored in when generating solutions.• A constraint is a factor that limits the system.
• Management is informed of the advantages and disadvantages of each proposal and then feasibility studies are carried out. [Complete Figure 1.8, p.15]• A feasibility study is a short report that analyses potential solutions in terms of the known constraints.
• The recommendations coming out of a feasibility study are based upon a number of criteria: • economic – cost of building and maintaining • technical – the IT requirements • schedule – whether there is enough time to achieve and maintain the new system • organisational – does it fit into the organisational structure and are staff skilled enough and/or supported properly
• There are three recommendation options coming out of a feasibility study.• These are: • no change • develop a new system • explore other options• If manager’s decide to proceed then a more detailed analysis is required.• The problems with the current system are fully investigated and then organised and analysed.
• When this is completed an analysis report is written.• It provides more details than the feasibility study as well as recommendations for design, implementation and maintenance.• It also contains the design specifications for the next stage.• They also form the basis for a more detailed project plan.