A presentation to describe two possible approaches to data warehouse creation, inmon and kimball.

1. Data Warehouse Architecture Inmon or Kimball
● DW Architecture
● How do we choose ?
● Bill Inmon
● Ralph Kimball
● Or some variant ?

2. Data Requirements
● What do your users need ?

3. Data Requirements
● What do your users need ?
● Can the the various groups agree ?

4. Data Requirements
● What do your users need ?
● Can the the various groups agree ?
● Do they have a time scale in mind ?

5. Data Requirements
● What do your users need ?
● Can the the various groups agree ?
● Do they have a time scale in mind ?
● Does your chief information officer
have a time scale and budget set ?
These points will influence your approach

6. What does Bill Inmon say ?
● One large integrated warehouse
schema

7. What does Bill Inmon say ?
● One large integrated warehouse
schema
● Longer to deliver and more expensive

8. What does Bill Inmon say ?
● One large integrated warehouse
schema
● Longer to deliver and more expensive
● No big bang, iterative approach

9. What does Bill Inmon say ?
● One large integrated warehouse
schema
● Longer to deliver and more expensive
● No big bang, iterative approach
● Top down approach based upon
organisation

10. What does Bill Inmon say ?
● One large integrated warehouse
schema
● Longer to deliver and more expensive
● No big bang, iterative approach
● Top down approach based upon
organisation
● Could feed departmental data marts

11. What does Bill Inmon say ?
● One large integrated warehouse
schema
● Longer to deliver and more expensive
● No big bang, iterative approach
● Top down approach based upon
organisation
● Could feed departmental data marts
● More complex

12. What does Ralph Kimball say ?
● Based on data marts, small subject
based schemas

13. What does Ralph Kimball say ?
● Based on data marts, small subject
based schemas
● Based on what user communities
want

14. What does Ralph Kimball say ?
● Based on data marts, small subject
based schemas
● Based on what user communities
want
● Quicker to deliver

15. What does Ralph Kimball say ?
● Based on data marts, small subject
based schemas
● Based on what user communities
want
● Quicker to deliver
● Later combine datamarts into
warehouse

16. What does Ralph Kimball say ?
● Based on data marts, small subject
based schemas
● Based on what user communities
want
● Quicker to deliver
● Later combine datamarts into
warehouse
● Dimensional modelling

17. What does Ralph Kimball say ?
● Based on data marts, small subject
based schemas
● Based on what user communities
want
● Quicker to deliver
● Later combine datamarts into
warehouse
● Dimensional modelling
● Based upon star schema's

18. What does Ralph Kimball say ?
● Kimball data bus
move data to staging and clean
then populate data marts from staging
must have conformed dimensions

19. What does Ralph Kimball say ?
● Kimball data bus
move data to staging and clean
then populate data marts from staging
must have conformed dimensions
● Approach
select business process
determine the granularity
choose dimensions
identify facts

20. Ralph Kimball versus Bill Inmon Comparison
Kimball
Need Immediate Longer time scale
Drive Business areas Enterprise
Budget Smaller budget Larger budget
Requirements Volatile More stable and growing
Customer User base Corporate
Sources Stable Changeable
Lower Higher
Projects Same cost as start up Cheaper than start up
Inmon
Startup cost

21. User Involvement
● Keep your users informed
● Make them a part of the process
● Under stand their needs
● Consider setting up user forums
● Consider having power users
● Consider sending out news letters and
updates
● Your project could fail if the users drift away !
Periodically ask the users, does the solution
meet your needs ?

22. Want to know more ?
● Thank you for taking the time to check this
presentation
● Please check our web site below
● Please feel free to ask any question that you
might have
Semtech Solutions Ltd
www.semtech-solutions.co.nzwww.semtech-solutions.co.nz
Email info@semtech-solutions.co.nz