Tài liệu, ebook Công Nghệ Thông Tin

Summary Implementation Distributed systems Client/server Training users and personnel Conversion Direct changeover Parallel Phased Gradual Modular prototype

60 trang | Chia sẻ: vutrong32 | Ngày: 20/10/2018 | Lượt xem: 1259 | Lượt tải: 0

Summary (Continued) Structure charts Structure chart modules Control Transformational Functional Documentation Pseudocode Procedure manuals FOLKLORE

56 trang | Chia sẻ: vutrong32 | Ngày: 20/10/2018 | Lượt xem: 1250 | Lượt tải: 0

Customers generally key or enter data themselves – customers know their own information better than anyone else. Data entered by customers are stored for later use – autocomplete and cookies. Data entered at the point of sale are reused throughout the entire order fulfillment process – allows better supply chain management, including checking pro...

65 trang | Chia sẻ: vutrong32 | Ngày: 20/10/2018 | Lượt xem: 1366 | Lượt tải: 1

Summary (Continued) Designing ecommerce Web site feedback Rollover menus Hierarchical displays of links Site maps Navigation bars Queries Six basic types

64 trang | Chia sẻ: vutrong32 | Ngày: 20/10/2018 | Lượt xem: 1295 | Lượt tải: 0

Summary (Continued) E-R diagrams Normalization First normal form Second normal form Third normal form Denormalization Data warehouse Data mining

64 trang | Chia sẻ: vutrong32 | Ngày: 20/10/2018 | Lượt xem: 1361 | Lượt tải: 0

Summary (Continued) Guidelines for Web fill-in forms (continued) Prepare two basic buttons on every Web fill-in form: Submit and Clear Form If the form is lengthy and the users must scroll extensively, divide the form into several simpler forms on separate pages Create a feedback screen that highlights errors in an appropriate color and refuses...

50 trang | Chia sẻ: vutrong32 | Ngày: 20/10/2018 | Lượt xem: 1232 | Lượt tải: 0

Output - Print, display, audio, microforms, CD-ROMs or DVDs, and Web-based documents Output design objectives – design output to serve the intended human and organizational purpose to fit the user to deliver the right quantity of output to deliver it to the right place to provide output on time to choose the right output method Output...

48 trang | Chia sẻ: vutrong32 | Ngày: 20/10/2018 | Lượt xem: 1395 | Lượt tải: 0

Summary (Continued) The systems proposal Identifying costs and benefits Break-even analysis Cash-flow analysis Present value analysis Putting together an effective systems proposal Visual considerations Oral presentation

70 trang | Chia sẻ: vutrong32 | Ngày: 20/10/2018 | Lượt xem: 1441 | Lượt tải: 0

Decision Analysis Advantages Structured English is useful when many actions are repeated and when communicating with others is important Decision tables provide complete analysis of complex situations while limiting the need for change attributable to impossible situations, redundancies, or contradictions Decision trees are important when proper...

46 trang | Chia sẻ: vutrong32 | Ngày: 20/10/2018 | Lượt xem: 1688 | Lượt tải: 1

Summary The data dictionary A reference work containing data about data Include all data items from data flow diagrams Repository A larger collection of project information Defining data structures Defining elements

56 trang | Chia sẻ: vutrong32 | Ngày: 20/10/2018 | Lượt xem: 1370 | Lượt tải: 0