OCF Information System
...a from transaction processing. Data provisioning also receives, stores, and manages information from information delivery and provides data back to transaction processing and data and information to information delivery when requested. Information Delivery requests data and information from data provisioning. It then transforms data into information by applying various models and techniques to perform analyses, identify trends, formulate decisions, develop presentations, and support decision-making. Recommendation / Conclusion KEYPOINT: Prototyping Methodology Analysis According to the textbook, the SDLC methodology is based on the premise that business requirements for the system will be static over the life of the project. Thus, the system requirements must be completely and finally specified before the Construction phase is begun. Once the requirements have been agreed upon, changing them leads to significant costs and potential schedule delays. In the second half of the 1980’s the growing availability of fourth-generation nonprocedural languages and relation database systems began to offer an alternative approach. These tools make it possible to build a system more quickly, and then change it after users have tried out and provided their feedback to the developers. Thus, rather then first defining the system and then building it, the system can be designed based upon the user’s experience and understanding gained from the previous versions. This approach is very powerful because, while most people find it difficult to specify in great detail exactly what they need from a new system, it is quite easy for them for them to point out what they don’t like about computer screens that they can try out and use. How this concept is illustrated in the study case is that according to the study case, the Architecture isn’t intended to constrain their choices. For an individual project, they look at the needs of that project, assess the architecture, and if the architecture doesn’t fit they don’t insist on following the architecture. They say that if people can’t follow the architecture, then they must explain why not. They must explain what forces them to violate the architecture, and justify the long-term cost to the corporation of that decision. They also state that it may turn out that the di...