SeharumSenjaPagi: January 2014

Tuesday 28 January 2014

chapter 8

CHAPTER 8

Chapter 8 – Accessing Organizational Information – Data Warehouse

What is Data Warehouse?

:) Defined in many different ways, but not rigorously

- A decision support database that is maintained separately from the organization’s operational database.

- A consistent database source that bring together information from multiple sources for decision support queries.

- Support information processing by providing a solid platform of consolidated, historical data for analysis.

History of Data Warehousing

:) In the 1990’s executives became less concerned with the day-to-day business operations and more concerned with overall business functions

:) The data warehouse provided the ability to support decision making without disrupting the day-to-day operations, because;

- Operational information is mainly current – does not include the history for better decision making

- Issues of quality information

- Without information history, it is difficult to tell how and why things change over time

Data warehouse fundamentals

:) Data warehouse – A logical collection of information – gathered from many different operational databases – that supports business analysis activities and decision-making takes

:) The primary purpose of a data warehouse is to combined information throughout an organization into a single repository for decision-making purposes – data warehouse support only analytical processing

Data warehouse model

:) Extraction, transformation and loading (ETL) – A process that extracts information from internal and external databases, transforms the information using a common set of enterprise definitions, and loads the information into a data warehouse.

:) Data warehouse then send subsets of the information to data mart.

:) Data mart – contains a subset of data warehouse info

Multidimensional Analysis and Data Mining

:) Relational Database contains information in a series of two-dimensional tables.

:) In a data warehouse and data mart, information is multidimensional, it contains layers of columns and rows

- Dimension – A particular attribute of information

:) Cube – common term for the representation of multidimensional information

:) Once a cube of information is created, users can begin to slice and dice the cube to drill down into the information.

:) Users can analyze information in a number of different ways and with number of different dimensions.

:) Data Mining – the process of analyzing data to extract information not offered by the raw data alone. Also known as “knowledge discovery” – computer-assisted tools and techniques for sifting through and analyzing vast data stores in order to finds trends, patterns and correlations that can guide decision making and increase understanding

:) To perform data mining users need data-mining tools

- Data-mining tool – uses a variety of techniques to finds patterns and relationships in large volumes of information. Eg: retailers and use knowledge of these patterns to improve the placement of items in the layout of a mail-order catalog page or Web page.

Information Cleansing or Scrubbing

:) An organization must maintain high-quality data in the data warehouse

:) Information cleansing or scrubbing – A process that weeds out and fixes or discards inconsistent, incorrect or incomplete information

:) Occurs during ETL process and second on the information once if is in the data warehouse

:) Contract information in an operational system

:) Standardizing Customer name from Operational Systems

:) Information cleansing activities

- Missing Records or Attributes

- Redundant Records

- Missing Keys or Other Required Data

- Erroneous Relationships or References

- Inaccurate Data

Business Intelligence

:) Business Intelligence – refers to applications and technologies that are used to gather, provides access, analyze data and information to support decision making efforts

:) These systems will illustrate business intelligence in the areas of customer profiling, customer support, market research, market segmentation, product profitability, statistical analysis, and inventory and distribution analysis to name a few

:) Eg; Excel, Access

chapter 7

CHAPTER 7

Chapter 7 - Storing Organizational Information - Database

RELATIONAL DATABASE FUNDAMENTALS

- Information is everywhere in an organization

- Information is stored in databases

::) Database – maintains information about various types of objects (inventory), events (transactions), people (employees), and places (warehouses)

- Database models include;

::) Hierarchical database model – information is organized into a tree-like structure (using parent/child relationships) in such a way that it cannot have too many relationships.

:) Network database model – a flexible way of representing objects and their relationships

::) Relational database model – stores information in the form of logically related two-dimensional tables

ENTITIES AND ATTRIBUTES

- Entity – a person, place, thing, transaction, or event about which information is stored

:) The rows in each table contains the entities

- Attributes (fields, columns) – characteristics or properties of an entity class

:) The columns in each table contain the attributes

KEYS AND RELATIONSHIPS

- Primary keys and foreign keys identity the various entity classes (tables) in the database

:) Primary key – a fields (or group of fields) that uniquely identities a given entity in a table

:) Foreign key – a primary key of one table that appears an attribute in another table and acts to provide a logical relationships among the two tables

RELATIONAL DATABASE ADVANTAGES

- Database advantages from a business perspective include;

:) Increased flexibility

:) Increased scalability and performance

:) Reduced information redundancy

:) Increased information integrity (quality)

:) Increased information security

INCREASED FLEXIBILITY

- A well-designed database should;

:) Handle changes quickly and easily

:) Provide users with different views

:) Have only one physical views

:) Physical view – deals with the physical storage of information on a storage device

:) Have multiple logical views

:) Logical view – focuses on how users logically access information

INCREASED SCALABILITY AND PERFORMANCE

- A database must scale to meet increased demand, while maintaining acceptable performance levels

:) Scalability – refers to how well a system can adapt to increased demands

:) Performance – measures how quickly a system performs a certain process or transaction

REDUCED INFORMATION REDUNDANCY

- Databases reduce information redundancy

:) Redundancy – the duplication of information or storing the same information in multiple places

- Inconsistency is one of the primary problems with redundant information

INCREASED INFORMATION SECURITY

- Information is an organization asset and must be protected

- Databases offer several security features including;

:) Password – provides authentication of the user

:) Access level – determines who has access to the different types of information

:) Access control – determines types of user access, such as read-only access

DATABASE MANAGEMENT SYSTEMS

- Database management systems (DBMS) – software through which users and application programs interact with a database

DATA-DRIVEN WEB SITES

- Data-driven Web sites – an interactive Web site kept constantly updated and relevant to the needs of its customers through the use of database

DATA-DRIVEN WEB SITE BUSINESS ADVANTAGES

- Development

- Content Management

- Future Expandability

- Minimizing Human Error

- Cutting Production and Update Costs

- More Efficient

- Improved Stability

chapter 5

CHAPTER 5

Chapter 5 – Organizational Structures that Support Strategic Initiatives

ORGANIZATIONAL STRUCTURE

:) Organizational employees must work closely together to develop strategic initiatives that create competitive advantages

:) Ethics and security are two fundamental building blocks that organizations must base their businesses upon.

INFORMATION TECHNOLOGY ROLES AND RESPONSIBILITIES

:) Information technology is a relatively new functional area, having only been around formally for around 40 years.

Recent IT – related strategic positions:

- Chief Information Officer (CIO)

- Chief Technology Officer (CTO)

- Chief Security Officer (CSO)

- Chief Privacy Officer (CPO)

- Chief Knowledge Officer (CKO)

Chief Information Officer (CIO) – oversees all uses of IT and ensures the strategic alignment of IT with business goals and objectives.

- Broad CIO functions include;

:)Manager – ensuring the delivery of all IT projects, on time and within budget.

:)Leader – ensuring the strategic vision of IT is in line with the strategic vision of the organization.

:)Communicator – building and maintaining strong executive relationships.

Average CIO compensation by industry

Industry	Average CIO Compensation
Wholesale/Retail/Distribution	$ 243,304
Finance	$ 210,547
Insurance	$ 197,697
Manufacturing	$ 190,250
Medical/Dental/Health Care	$ 171,032
Government	$ 118,359
Education	$ 93,750

· What concerns CIOs the most

Percentages %	CIOs Concerns
94	Enhancing customer satisfaction
92	Security
89	Technology evaluation
87	Budgeting
83	Staffing
66	ROI analysis
64	Building new applications
45	Outsourcing hosting

:) Chief Technology Officer (CTO) – responsible for ensuring the throughput , speed, accuracy, availability and reliability of IT

:) Chief Security Officer (CSO) – responsible for ensuring the security of IT systems

:) Chief Privacy Officer (CPO) – responsible for ensuring the ethical and legal use of information

:)Chief Knowledge Officer (CKO) – responsible for collecting, maintaining and distributing the organization’s knowledge

THE GAP BETWEEN BUSINESS PERSONNEL AND IT PRSONNEL

:) Business personnel possess expertise in functional areas such as marketing, accounting and sales

:) IT personnel have the technological expertise

:)This typically causes a communications gap between the business personnel and IT personnel

IMPROVING COMMUNICATIONS

:) Business personnel must seek to increase their understanding of IT

:) IT personnel must seek to increase their understanding of the business

:) It is the responsibility of the CIO to ensure effective communication between business personnel and IT personnel

ORGANIZATIONAL FUNDAMENTALS – ETHICS AND SECURITY

:) Ethics and security are two fundamental building blocks that organizations must base their businesses on to be successful.

:) In recent years, such event as the 9/11 have shed new light on the meaning of ethics and security.

ETHICS

:) Ethics – the principles and standards that guide our behavior toward other people

:) Privacy is a major ethical issues;

:(Privacy – the right to be left alone when you want to be to have control ever your own personnel possessions and not to be observed without your consent

:) Issues affected by technology advances

Intelligent property	Intangible creative work that is embodied in physical form
Copyright	The legal protection afforded an expression of an idea, such as a song, video game and some types of proprietary documents
Fair use doctrine	In certain situations, it is legal to use copyrighted material
Pirated software	The unauthorized use, duplication, distribution or sale of copyrighted software
Counterfeit software	Software that is manufactured to lock like the real thing and sold as such

One of the main ingredients in trust is privacy
Primary reasons privacy issues lost trust for e-business

1.	Loss of personnel privacy is a top concern for Americans in the 21^st century
2.	Among Internet users, 37 percent would be “a lot” more inclined to purchase a product on a websites that had a privacy policy
3.	Privacy/security is the number one factors that would convert Internet researchers into Internet buyers

SECURITY – HOW MUCH WILL DOWNTIME COST YOUR BUSINESS??

Sources of Unplanned Downtime
Bomb threat	Hacker	Snowstorm
Burst pipe	Hail	Sprinkler malfunction
Chemical spill	Hurricane	Static electricity
Construction	Ice storm	Strike
Corrupted data	Insects	Terrorism
Earthquake	Lightning	Theft
Electrical short	Network failure	Tornado
Epidemic	Plane crash	Train derailment
Equipment failure	Frozen pipe	Smoke damage
Evacuation	Power outage	Vandalism
Explosion	Power surge	Vehicle crash
Fire	Rodents	Virus
Flood	Sabotage	Water damage (various)
Fraud	Shredded data	Wind