Good info is derived from accurate data.
Data needs to be sufficient for the purpose for which it was
generate, but just barely so. Not more.
A Character of data
Challenges of mobile devices at work:
-advantages: cost savings, employee
satisfaction, less training. -Disadvantages: data loss or damage, loss of
control, compatibility problems, risk of infection, greater support costs.
Characteristics of Data:
Accurate, Timely, Relevant, Barely Sufficient, and
worth its costs
Characteristics of the Cloud:
pooled, economies of scale, elastic
Cloud Services from cloud vendors:
content delivery network (CDN) –
Many different geographical locations and makes data available on demand.
Collaboration and team communication:
Synchronous: Shared calendars,
Word, conference calls, screensharing. Asynchronous: email, discussion
forums, and team surveys.
Collaboration IS/Collaboration systems:
an information system that
supports collaboration. -Complete the work, on time, on budget. -growth in
team capability -meaningful and satisfying experience
bytes are grouped into columns, also known as fields
Competitive structure and value chain:
a value chain is a network of value-
creating activities. Organizations analyze and come up with a competitive
strategy. They then need to organize and structure the organization to
implement that strategy. -Cost and industry-wide
= Lowest across the industry
(wal-mart) -Differentiation and industry-wide
= better product/service across
the industry (Neiman Marcus) -Cost and Focus
= lowest cost within an
industry segment (payless shoes) -Differentiation and focus
product/service within an industry segment (Tiffany & Co.)
represented by bits (8-bit chunks=byte) because they are
easy to represent physically. The cache and main memory are volatile,
meaning their contents are lost when power is off. Magnetic and optical disks
are nonvolatile, meaning their contents survive when power is off.
Data= characters, images, etc.
Bytes: bits grouped into 8-bit chunks
Kilobyte: K. 1,024 bytes
Megabyte: MB 1,024 Kilobytes
Gigabyte: GB 1,024 megabytes
Terabyte: TB 1,024 gigabytes
Petabyte: PB 1,024 terabytes
Exabyte: EB 1,024 Petabytes
Zettabyte: ZB 1,024 Exabytes
provide security, data consistency, and special
purpose processing. -Details: forms, queries, reports, application programs.
Database App forms:
view data; insert new, update existing, and delete
Database App queries:
search based upon data values provided by the user.
Database app reports:
structured presentation of data using sorting,
grouping, filtering, and other operations.
Data integrity issue:
Data integrity is the maintenance of, and the assurance
of the accuracy and consistency of, data over its entire life-cycle. A table that
has data integrity problems will produce incorrect and inconsistent results.
Database Management system is a program used to create, process,
and administer a database.
Details of Database Apps:
main DBMS products: DB2 from IBM, Access