Chapter 5 Flashcards
Difficulties of managing Data
-data increases exponentially with time
data security, quality and integrity may be compromised
Sources of Data
Internal sources - corporate databases
Personal sources - thoughts opinions, experiences
External sources - commercial databases
New sources - Blogs, tweets
Transactional data
represent activities, such as payroll cheque or customer invoice, stored in transaction files
Master data
set of core data, such as employee name, address, stored in master file
Database management systems (DBMS)
minimize data redundancy, isolation, inconsistency
maximize data security, integrity, independence
Data Hierarchy
Bit
Byte
Field
Record
Data File or table
Database
The Relational Database Model
data model
entity
instance
attribute
primary key
foreign key
secondary key
Big Data
Diverse, high volume, high velocity information assets that require new forms of processing to enable enhanced decision making, insight discovery, and process optimization
Big Data consists of:
Traditional enterprise data
machine generated/sensor data
social data
Data warehouse
a repository of historical data organized by subject to support decision makers in the organization
Data Mart
low cost, scaled down version of a data warehouse designed for end -user needs in a strategic business unit or individual department
Knowledge management
process that helps manipulate important knowledge that comprises part of the organizations memory
Explicit Knowledge
objective, rational, technical
Tacit Knowledge
Subjective or experiential
Knowledge Management Sysytems
The use of modern information technologies to systematize, enhance, and expedite intrafirm and interfirm knowledge
management
