case study (chapter 7).pptx

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“Fundamentals of Business Analytics”

RN Prasad and Seema AcharyaCopyright 2011 Wiley India Pvt. Ltd. All rights reserved.

Multidimensional

Data Modeling



Case Study 1


RN Prasad and Seema Acharya

Copyright 2011 Wiley India Pvt. Ltd. All rights reserved.



•A multinational sales company has its head quarters at New Delhi.

• They sell various products.

• Their products are sold in different countries like Australia, Canada, France,

Germany and so on.

• The President of the company wants sales and order quanti ty inf ormation

for each quarter, month and day in a year.

Business Scenario






Identify the entities

Conceptual Modeling





Product

Sales Region

Time

Sales Information

Conceptual Modeling

Entities






Conceptual Modeling

Establish relationship between the entities





Conceptual Modeling

SalesInformationProduct Sales Region

Time





Logical Modeling

Identify the facts, dimensions, attributes, hierarchies and grain





Logical Modeling

Facts

Sales

Amount

Order

Quantity



Co ri ht 2011 Wile India Pvt. Ltd. All ri hts reserved.



Logical Modeling

Identify the grain(s)





Logical Modeling

Grain Identified

Time – Day





Logical Modeling

Dimensions

Product

Sales Region

Time





Logical Modeling

Attributes

Product – Name, Color, Size

Sales Region – Region Name





Logical Modeling

Hierarchies Identified

Year

Quarter

Month

Day



Co ri ht 2011 Wile India Pvt. Ltd. All ri hts reserved.



Logical Modeling

Putting the pieces together…

Design the schema





Logical Modeling

Fact Table

Product Key

Sales Region Key

Time key

Sales Amount

Order Quantity

Product Dimension

Table

Product Key

Product Name

Color

Size

Sales RegionDimension Table

Sales Region Key

Territory Name

Country

Time Dimension

Table

Time Key

Date

Month

Quarter

Year



Case Study 2

Modifying the Scenario





•

A multinational sales company has its head quarters at New Delhi.

• They sell various products.

• Their products are sold in different countries like Australia, Canada, France,

Germany and so on.

The President of the company wants sales and order quanti ty information for

each individual employee and also teamwise for every quar ter to decide on

appraisal.

New Business Scenario





Identify the entities that are to be added

Conceptual Modeling





Product

SalesRegion

Time

Sales

Information

Conceptual Modeling

Entities

Employee “Fundamentals of Business Analytics”




Conceptual Modeling

Establish relationship between the new and existingentities



Conceptual Modeling

SalesInformation

Product Sales Region

Time

Employee





Logical Modeling

Identify the facts, dimensions, attributes,

hierarchies and grain





Logical Modeling

Facts

Sales

amount

Order

Quantity





Logical Modeling

Identify the grain(s)





Logical Modeling

Grains Identified

Time – Quarter

Employee – Individual





Logical Modeling

Dimensions

Product

Sales Region Time

Employee





Logical Modeling

New Attributes

Employee – Name, Email, Manager Name, Gender





Logical Modeling

Hierarchies Identified

Year

Quarter

Team

Individual





Logical Modeling

Modify the schema





Logical Modeling

Fact Table

Product Key

Sales Region Key

Time key

Employee Key

Sales Amount

Order Quantity

Product Dimension

Table

Product Key

Product Name

Color

Size

SalesRegion

Dimension Table

Sales Region Key

Territory Name

Country

Time Dimension

Table

Time Key

Quarter

Year

Employee

Dimension Table

Employee Key

Email

Name

Gender

Manager



Case Study 3

Modifying the Scenario Further





•

A multinational sales company has its head quarters at New Delhi.

• They sell various products which can be categorized and subcategorizedaccordingly.

•

Their products are sold in different countries like Australia, Canada, France,Germany and so on.

The President of the company wants category wise sales and order quanti ty

inf ormation for each individual employee and also teamwise for every quar ter

to view business productivity.

Modified Business Scenario





Conceptual Modeling

SalesInformation

Product Sales Region

Time

Employee

Sub

Category

Category “Fundamentals of Business Analytics”




Logical Modeling

New Hierarchy Identified





Logical Modeling

Modify the Star schema to Snowflake schema



Logical Modeling



Logical Modeling

Fact TableProduct Key

Sales Region Key

Time key

Employee Key

Sales Amount

Order Quantity

Product Dimension

Table

Product Key

Product NameColor

Sub-Category Key

Size

SalesRegion

Dimension Table

Sales Region Key

Territory Name

Country

Time Dimension

Table

Time Key

Quarter

Year

Employee

Dimension Table

Employee Key

Email

Name

Gender

Manager

Sub-Category

Table

Sub-Category

Key

Sub-CategoryName

Category Key

Category Table

Category Key

Categor Name

case study (chapter 7).pptx

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