1、Chapter 2 Understanding Organizational Style and Its Impact on Information Systems,Systems Analysis and Design Kendall and Kendall Fifth Edition,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-2,Major Topics,Organizational environment Nature of systems Context-level data flow diagram Entit
2、y-relationship diagram Levels of management Organizational culture,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-3,Organizations,Organizations are composed of interrelated and interdependent subsystems System and subsystem boundaries and environments impact on information system analysis
3、 and design,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-4,Organizational Environment,Community environment Geographical Demographics (education, income) Economic environment Market factors Competition Political environmentState and local government,Kendall & Kendall,Copyright 2002 by P
4、rentice Hall, Inc.,2-5,Open and Closed Systems,Systems are described as either Open Free-flowing information Output from one system becomes input to another Closed with restricted access to information Limited by numerous rules Information on a need to know basis,Kendall & Kendall,Copyright 2002 by
5、Prentice Hall, Inc.,2-6,Virtual Organizations,A virtual organization has parts of the organization in different physical locations Computer networks and communications technology are used to work on projects,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-7,Virtual Organization Advantages,
6、Advantages of a virtual organization are Reduced costs of physical facilities More rapid response to customer needs Flexibility for employees to care for children or aging parents,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-8,Enterprise Resource Planning,Enterprise Resource Planning (E
7、RP) describes an integrated organizational information system The software helps the flow of information between the functional areas within the organization,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-9,Context-Level Data Flow Diagram (DFD),A context-level data flow diagram is an impo
8、rtant tool for showing data used and information produced by a system It provides an overview of the setting or environment the system exists within: which entities supply and receive data/information,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-10,Context-Level DFD Symbols,Entity, a pe
9、rson, group, department, or system that supplies or receives information It is labeled with a noun,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-11,Context-Level DFD Symbols,Process, representing the entire system It is given the number 0,Kendall & Kendall,Copyright 2002 by Prentice Hall
10、, Inc.,2-12,Context-Level DFD Symbols,Data flow, represented by an arrow It shows information that passes to or from the process Data flow is labeled with a noun,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-13,Entity-Relationship Diagrams (E-R Diagrams),Entity-relationship diagrams help
11、 the analyst understand the organizational system and the data stored by the organization Symbols are used to represent entities and relationships,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-14,Entities,There are three types of entities: Fundamental entity, describing a person, place,
12、or thing Associative entity, linking entities Attributive entity, to describe attributes and repeating groups,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-15,Fundamental Entity,Describes a person, place, or thing Symbol is a rectangle,Kendall & Kendall,Copyright 2002 by Prentice Hall, I
13、nc.,2-16,Associative Entity,Joins two entities Can only exist between two entities Symbol is a diamond inside a rectangle Also called a Gerund Junction Intersection Concatenated entity,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-17,Attributive Entity,Describes attributes and repeating
14、groups Symbol is an oval in a rectangle,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-18,Relationships,Relationships show how the entities are connected There are three types of relationships: One to one One to many Many to many Relationship lines are labeled,Kendall & Kendall,Copyright
15、2002 by Prentice Hall, Inc.,2-19,Relationship Notation,One is indicated by a short vertical line Many is indicated by a crows foot,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-20,Entity Relationship Example,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-21,Attributes,Data att
16、ributes may be added to the diagram,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-22,Creating Entity-Relationship Diagrams,Steps used to create E-R diagrams List the entities in the organization Choose key entities to narrow the scope of the problem Identify what the primary entity shoul
17、d be Confirm the results of the above through data gathering,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-23,Managerial Control,The three levels of managerial control are Operations management Make decisions using predetermined rules Middle management Strategic management,Kendall & Kend
18、all,Copyright 2002 by Prentice Hall, Inc.,2-24,Operations Management,Make decisions using predetermined rules that have predictable outcomes Work is clear-cut High degree of certainty in decision making Oversee the operating details of the organization Dependent on internal information,Kendall & Ken
19、dall,Copyright 2002 by Prentice Hall, Inc.,2-25,Middle Management,Make short-term planning and control decisions about resources and organizational objectives Experience very little certainty in their decision making Partly operational and partly strategic Dependent on internal information, both his
20、torical and prediction oriented,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-26,Strategic Management,Look outward from the organization to the future Make decisions that will guide middle and operations managers Work in highly uncertain decision-making environment Define the organizatio
21、n as a whole Dependent on external information,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-27,Managerial Levels,Each of the three levels of management have Different organization structure Leadership style Technological considerations Organization culture Human interaction All carry im
22、plications for the analysis and design of information systems,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-28,Organizational Culture,Organizations have cultures and subcultures Learn from verbal and nonverbal symbolism,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-29,Verbal Symbolism,Using language to convey Myths Metaphors Visions Humor,Kendall & Kendall,Copyright 2002 by Prentice Hall, Inc.,2-30,Nonverbal Symbolism,Shared artifacts Trophies, etc. Rites and rituals Promotions Birthdays, etc. Clothing worn Office placement and decorations,
