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問題一覧
1
a planned undertaking of related activities to reach an objective that has a beginning and an end.
Managing Projects
2
Three database features: • Data modeling–drawing entity-relationship diagrams • Code generation–SQL code for table creation • Repositories–knowledge base of enterprise information
True
3
Systems Development Life Cycle • Purpose–preliminary understanding Deliverable–request for study • Database activity– enterprise modeling and early conceptual data modeling.
Planning
4
Describe interrelationships between planning objects/Describe relationships between planning objects in the organization.
Planning matrixes
5
Analyze requirements/ Develope preliminary data model.
Conceptual Data Modeling
6
What are the Type of Matrixes:(5)
Location-to-function, Unit-to-function, IS-to-data entity, Supporting function-to-data entity, IS-to-business objective
7
Code database processing/Install new database contents, usually from existing data source
Database Implementation
8
There are Four steps to Top-Down planning: • Planning • Analysis • Design • Implementation
True
9
describes the high-level entities in an organization and the relationship between these entities
Enterprise Data Model
10
Analyze database to ensure it meets application needs/ Fix errors in database.
Database maintenance
11
a generic IS planning methodology for obtaining a broad understanding of the IS needed by the entire organization
Top-down planning
12
Two Approaches to Database and IS Development:
SDLC & Prototyping
13
review of systems development project after each development phase with rejustification after each phase
Incremental Commitment
14
Iterative process breaking system description into finer and finer detail
Functional decomposition
15
Packaged Data Models • Two types:
• Universal data models • Industry-specific data models
16
What are the examples of Identify Corporate Planning Objects (5)
Ogranizational units, Organizational locations, Business Functions, Entity types, Information systems
17
Define new database contents to DBMS/ Decide on physical organization for new data/Design database processing programs
Physical database design and definition
18
Conceptual blueprint for organization’s desired information systems structure
Information Systems Architecture (ISA)
19
software tools providing automated support for systems development
Computer-Aided Software Engineering (CASE)
20
• Purpose–programming, testing, training, installation, documenting Deliverable– operational programs, documentation, training materials • Database activity– database implementation, including coded programs, documentation, installation and conversion.
Implementation
21
- A data-oriented methodology to create and maintain information systems
Information Engineering
22
Example of Database Schema/Three-schema architecture: • External Schema:(4)
User views, Subsets, Can be determined, DBA determines schema
23
• Purpose–information requirements elicitation and structure Deliverable–detailed design specifications • Database activity– logical database design (transactions, forms, displays, views, data integrity and security).
Logical Design
24
Model components that can be purchased, customized, and assembled into full-scale data models.
Packaged Data Models
25
What are the example of Enterprise Data Model (7)
First step in database development, Specifies scope and general content, Overall picture of organizational data at high level of abstraction, Entity-relationship diagram, Business rules, Relationships between entities, Descriptions of entity types
26
Whar are the examples of Identify Strategic Planning Factors(3)
Organization goals, critical success factors, Problem areas
27
• Purpose–monitor, repair, enhance Deliverable–periodic audits • Database activity– database maintenance, performance analysis and tuning, error corrections.
Maintenance
28
• Purpose–thorough requirements analysis and structuring Deliverable–functional system specifications • Database activity–thorough and integrated conceptual data modeling.
Analysis
29
Analyze requirements in detail/ integrate database views into conceptual data model.
Logical database Design
30
Example of Database Schema/Three-schema architecture: • Conceptual Schema:(1)
E-R models
31
Managing Projects: People Involved(8)
Database analysts and data modelers, Users, Programmers, Database architects , Data administrators , Project managers
32
• Purpose–develop technology and organizational specifications Deliverable– program/data structures, technology purchases, organization redesigns • Database activity– physical database design (define database to DBMS, physical data organization, database processing programs).
Physical Design
33
Example of Database Schema/Three-schema architecture: • Internal Schema:(2)
Logical structures , Physical structures