system analysis and design methods whitten bentley ppt

... Information System Building Blocks Trang 2Objectives information systems. architecture in systems development. system owners and system users with a perspective of an information system. system designers ... organize and view the fundamental building blocks of information systems. Trang 9High-Level Goals of System Owners and System Users people collaboration Trang 10Technology Perspectives of System Designers ... Concerned with the information system’s inputs and outputs Trang 23Views of COMMUNICATION (cont.) • Concerned with the technical design of both the user and the system-to-system communication interfaces

Ngày tải lên: 10/01/2018, 16:06

... approach an approach to systems analysis and design that completes each phase one after another and only once Iterative development approach an approach to systems analysis and design that completes ... conceptual design and essential design System model – a picture of a system that represents reality or a desired reality System models facilitate improved communication between system users, system ... Divide and conquer. • Design systems for growth and change. Trang 12Use a Problem-Solving Approach Classical Problem-solving approach 1 Study and understand the problem, its context, and its

Ngày tải lên: 10/01/2018, 16:06

... Trang 2• Define the terms project and project management, and differentiate between project and process management. • Describe causes of failed information systems and technology projects. • Describe ... • Assign resources and produce a project schedule with a Gantt chart. • Assign people to tasks and direct the team effort. • Use critical path analysis to adjust schedule and resource allocations ... schedule and budget deviations. • Manage user expectations of a project and adjust project scope Trang 34-3Trang 4Projects and Project ManagersProject – a [temporary] sequence of unique, complex, and

Ngày tải lên: 10/01/2018, 16:06

... Inc All Chapter 5 Systems Analysis Trang 2• Define systems analysis and relate it to the scope definition, problem analysis, requirements analysis, logical design, and decision analysis phases. ... information system building blocks. • Describe scope definition, problem analysis, requirements analysis, logical design, and decision analysis phases in Trang 4What is Systems Analysis ?Systems analysis ... a number of systems analysis approaches for solving business system problems. • Describe scope definition, problem analysis, requirements analysis, logical design, and decision analysis phases

Ngày tải lên: 10/01/2018, 16:06

... interactions between the system and external systems and users • graphically describes who will use the system and in what ways the user expects to interact with the system. Use-case narrative ... requirements analysis to capture the interactions between a user and the system free of technology and implementation details • During requirements analysis, strive to identify and document ... elicit the correct and necessary system requirements from the stakeholders and specify them in a manner understandable to them so those requirements can be verified and validated. The hardest

Ngày tải lên: 10/01/2018, 16:06

... 1Chapter 8Data Modeling and Analysis Trang 2• Define data modeling and explain its benefits. • Recognize and understand the basic concepts and constructs of a data model. • Read and interpret an entity ... during a project and where the models are stored. • Discover entities and relationships. • Construct an entity-relationship context diagram. • Discover or invent keys for entities and construct ... relationship diagram and describe data structures and attributes to the repository. • Normalize a logical data model to remove impurities that can make a database unstable, inflexible, and nonscalable

Ngày tải lên: 10/01/2018, 16:06

... ADDRESS) and one or more instances of: PRODUCT NUMBER and PRODUCT DESCRIPTION and QUANTITY ORDERED and PRODUCT PRICE and PRODUCT PRICE SOURCE and EXTENDED PRICE and SUM OF EXTENDED PRICES and PREPAID ... Trang 2• Define systems modeling and differentiate logical and physical models. • Define process modeling and explain its benefits. • Recognize and understand basic concepts and constructs of ... with plural noun Gane and Sarson shape DeMarco/Yourdon shape Trang 11• Modeling processes helps us to understand the interactions with the system's environment, other systems, and other processes.•

Ngày tải lên: 10/01/2018, 16:06

... interactions between the system and external systems and users In other words it graphically describes who will use the system and in what ways the user expects to interact with the system The use-case ... 1Chapter 10Object-Oriented Analysis and Modeling Using the UML Trang 2Objectives • Define object modeling and explain its benefits • Recognize and understand the basic concepts and constructs of object ... of the system. 2 Finding and identifying the business objects. 3 Organizing the objects and identifying their relationships. Trang 24Construction the Analysis Use-Case Model System analysis

Ngày tải lên: 10/01/2018, 16:06

... Tools for Input Design and Prototyping • Old Tools • Record Layout Charts • Display Layout Charts • Newer Prototyping Tools Trang 23Input Design Process 1 Identify system inputs and review logical ... associated with online and real-time processing Touch Screen Same as above. Data is entered o a touch screen display or handheld device Data entry users either touch commands and data choices or ... requires rigid command menu structure and limited input options Data is almost always processed immediately as a transaction or inquiry Speech Same as sound Data (and commands) is spoken This

Ngày tải lên: 10/01/2018, 16:06

... Trang 6Commandments of User Interface Design• Understand your users and their tasks • Involve the user in interface design • Test the system on actual users • Practice iterative design. Trang ... Interfaceswidely accepted command language that can be used to invoke actions defined for custom information systems. • Commands unique to that system and meaningful to user questions and command in their native ... Interfaces Styles and Considerations• Windows and frames • Menu-driven interfaces • Pull-down and cascading menus • Tear-off and pop-up menus • Toolbar and iconic menus • Hypertext and hyperlink

Ngày tải lên: 10/01/2018, 16:06

... 18Object-Oriented Design and Modeling Using the UML Trang 2• Understand entity, interface, control, persistence, and system classes. • Understand the concepts of dependency and navigability. ... 33Transforming Analysis Class Diagram to Design Class Diagram• Add design objects to diagram • Add attributes and attribute-type information to design objects • Add attribute visibility • Add methods to design ... Cases Trang 14Design Use CaseTrang 15Design Use Case (continued)Trang 16Design Use Case (continued)Trang 17Design Use Case (concluded)Trang 18Modeling Class Interactions, Behaviors, and States•

Ngày tải lên: 10/01/2018, 16:06

... 20Systems Operations and Support Trang 2Objectives • Define systems operations and support. • Describe relative roles of a repository, program library, and database in systems operations and ... other words, reports and outputs • Requirements that exceed this should be subjected to systems analysis and design to consider implications. • Can be written in 4GLs Trang 20System Enhancement ... system is a system that has been placed into operation Frequently called a production system. Support versus Operation Trang 5The Context of Systems Operation and SupportTrang 6Systems Development,

Ngày tải lên: 10/01/2018, 16:07

... process and techniques used by systems analysts to identify or extract system problems and solution requirements from the user community System requirement – something that the information system ... Understand the concept of requirements management • Identify and characterize seven fact-finding techniques. • Understand six guidelines for effective listening • Understand body language and proxemics ... The system may be delivered later than promised. • The system may not meet the users’ expectations and they may not to use it. • Once in production, costs of maintaining and enhancing system

Ngày tải lên: 10/01/2018, 16:06

... Resource  The systems analyst performs systems analysis and design.  Systems analysis is the study of a business problem domain for the purpose of recommending improvements and specifying ... role in systems and applications development, the systems analyst.  A systems analyst(s) facilitates the development of Trang 5The Modern Systems AnalystWho Should Read This Book  The Systems ... traditional systems analyst?  What are the roles of systems analysts and business users in systems problem solving?  Where are the career opportunities for systems analysts?  Who are the systems

Ngày tải lên: 10/01/2018, 16:08

... S T S SYSTEM BUILDERS SYSTEM DESIGNERS SYSTEM USERS SYSTEM OWNERS Data Technology INFORMATION SYSTEM COMPONENTS (the actual, technical implementation of the system) INFORMATION SYSTEM DESIGN ... of Information Systems  System Builders based upon the design specifications from the system designers In many cases, the system designer and builder for a component are one and the same builder ... DESIGNERS (specification) SYSTEM USERS (requirements) SYSTEM OWNERS (scope) System Builders' views of DATA System Designers' views of DATA System Users' views of DATA System Owners' views of DATA

Ngày tải lên: 10/01/2018, 16:08

... Systems Analysis Systems Design Systems Implementation Trang 19Information System DevelopmentUnderlying Principles of Systems Development  Principle 8: Design Systems for Growth and Change  Systems ... 6 Design and integrate the target system 7 Construct and test the target system 8 Install and implement the production system System Users Information Technology Vendors training, support, and ... demonstrations and feedback ideas and opinions ideas and opinions requirements and rriorities the business, problems, causes, and effects Unplanned System Request Planned System Project Project and System

Ngày tải lên: 10/01/2018, 16:08

... together system owners, users, analysts, designers, and builders to jointly define and design systems Synonyms include joint application design and joint Trang 17Systems AnalysisStrategies for Systems ... What is System Analysis?  For this presentation we will use the following definition:  Systems analysis is (1) the survey and planning of the system and project, (2) the study and analysis ... Trang 7Systems AnalysisStrategies for Systems Analysis and Problem Solving  Modern Structured Analysis  Structured analysis was one the first formal strategies developed for systems analysis

Ngày tải lên: 10/01/2018, 16:08

... ModelingAn Introduction to Systems Modeling a thousand words, most system models are pictorial representations of reality understand those systems, or for proposed systems as a way to document ... PROCESSESFOCUS ON SYSTEM INTERFACES Existing Applications and Technology Existing Interfaces and Technology Existing Networks and Technology FOCUS ON SYSTEM GEOGRAPHY Definition Phase (establish and prioritize ... sampling of existing forms and files; research of similar systems; surveys of users and management; and interviews of users and management simultaneously constructing and verifying the data models

Ngày tải lên: 10/01/2018, 16:08

... by a system’s PROCESSES methods (DFDs). through a system and the work or processing performed by that system Synonyms include bubble chart, transformation graph, and Trang 8FOCUS ON SYSTEM ... the application of formal systems theory and concepts to systems problem solving are organized, and how they work useful real-world systems Trang 13outputs, and the system itself – viewed a process ... Introduction to System Modeling  System Models problems a thousand words, most system models are pictorial representations of reality Trang 4Process ModelingAn Introduction to System Modeling  System

Ngày tải lên: 10/01/2018, 16:09

... Model FOCUS ON SYSTEM PROCESSES Interface Requirements Logical Interface Model FOCUS ON SYSTEM INTERFACES Software (and Hardware) Technology (and standards) Interface Technology (and standards) Networking ... the overall system or a subset of that system system into logical subsets of locations for improved communication, analysis, and design Trang 16Network ModelingInventory Control System Geography ... facts and information as supplied by the user community research of similar systems; surveys of users and management; and interviews of users and management simultaneously constructing and verifying

Ngày tải lên: 10/01/2018, 16:09