giá cả, và ngày giao hàng. Nếu tài nguyên và thông tin về nguồn thông tin được mô phỏng trong cùng một lớp, các khái niệm này là xen kẽ, làm cho nó khó khăn để xác địnhBảng Nội dung thực hiện quá trình kinh doanh cho các chuyên gia IT và quản lý Lời nói đầu Lời nói đầu Chương | GUI and Users There are no graphical user interfaces GUIs directly connected to the PDM system. Instead the systems using the PDM system have GUIs. The Internet Intranet and Extranet Applications are all Web-based and provide the GUIs for other applications. It is important to define style guidelines for the GUIs at an early stage to avoid confusing the different interfaces at the end of the project. It is also a good idea to sketch the GUIs or to prototype them using some of the end users. System Requirement Specification System requirements specifications detail how the system is developed. The content of a requirements specification for an information system such as the PDM system might include 1. Summary. Summarize the requirement specification. 2. Problem and background. Gives a brief introduction to the perceived problem and includes some background information. 3. Procurement regulations. Public tenders are regulated by procurement regulations and there might also be other situations where procurement regulations are involved. The procurement regulations should be stated here. 4. The business vision and goals. A short description of the business goals and vision. 5. The structure of the business the business processes and the business rules. A short description of the business processes and rules. 6. Description of legacy systems. A description of legacy systems affected by the system being specified. 7. Use cases. Specifies functional and nonfunctional system requirements. 8. Prioritization. Specifies and motivates prioritization of requirements if there are any . 9. Requirements of commercial software and commercial hardware. Specifies demands or requirements of commercial software and hardware used in the solution if there are any. 10. IT strategies. Identifies and describes anything in the IT strategies that affects the development of the systems being specified. 11. GUI sketch. Illustrates the graphical user interfaces if there are any. 12. Information