Download Business Information Systems: Analysis, Design & Practice by Graham Curtis; David Cobham PDF

By Graham Curtis; David Cobham

Is helping scholars to achieve a complete figuring out of the way info platforms can reduction the realisation of commercial pursuits. The ebook covers BIS from a company, technical and platforms improvement perspective.With balanced and transparent assurance of the extra technical platforms points of BIS and the softer, extra managerial issues including an analytical strategy, this well-established textual content offers a great assurance of the subject from structures, layout research and making plans to facts mining, company intelligence and data administration. significant other web site comprises a number of selection questions, tricks that can assist you solution the questions within the e-book, weblinks, a web word list and extra case stories compatible to scholars taking a BIS measure or a BIS module on a enterprise or computing measure.

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Example text

The only rule is that if their use increases understanding of the system and aids communication of this knowledge then the technique is acceptable; otherwise, it is pointless. 3 Subsystems decoupling Subsystems can be connected together via their inputs and outputs either directly or through intervening subsystems. The extent of the dependence of the subsystems on one another is known as the degree of coupling. Two subsystems are highly coupled if a change in the outputs of one causes a substantial change in the state of the other.

Therefore, the expected pay-off profit for the farmer is 90. The value to the farmer of the information is the difference between the expected pay-offs with and without the information. Any rational farmer would be prepared to pay up to 30 for this weather forecasting information. Although this example is highly simplified, it clearly illustrates the way information can be of aid in a decision. 5 × 100 = 90 ∴ the value of the information = expected pay-off profit with information – expected pay-off profit without information = 90 − 60 = 30 n n the probabilities that the factors will be operative (past weather records indicating the probability of wet or dry weather); and the reduction in uncertainty surrounding these factors as a result of the information (perfect weather forecast leading to elimination of uncertainty).

2. Is it possible to estimate the cost effectiveness of a project such as this, considering both the expenditure and the value of the information obtained? 2 Non-quantifiable value It is undeniable that information can provide benefits that are not strictly measurable. For example, better information provided to customers on available products and current prices is liable to increase customer confidence, attract new customers and prevent existing customers moving elsewhere. It is impossible to put a figure on this value.

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