Question

The disadvantage of the four-model approach is that ____.

a. ​the requirements of a new information system always are different from the current information system
b. ​additional time and cost are required to develop a logical and physical model of the current system
c. ​it does not take additional steps to avoid mistakes made earlier in systems development
d. ​it gives an unclear picture of the current system functions before any modifications or improvements are made

Answer 1

The four-model approach's disadvantage is the need for additional time and cost in developing detailed models of the current system, demanding more computational power and complicating analysis and communication.

Step-by-step explanation:

The disadvantage of the four-model approach is that it requires additional time and cost to develop a logical and physical model of the current system. Unlike other methodologies that may proceed more directly towards designing a new system, the four-model approach necessitates a more thorough understanding of the existing system through both logical and physical modeling. The implication is that while this approach may lead to more informed system improvements, by comprehensively understanding the current system's functions before alterations, it also demands more resources, which may sometimes include the need for more powerful computers to handle the complexity of the models. Moreover, it can be more challenging to analyse, understand, and communicate the findings due to the complexity inherent in these models.