1.
5 Productivity Tips
for Efficient Data
Cleansing
Lee Baker
CEO
Chi-Squared Innovations

2.
First Steps
1. Collect your data
2. Enter your data into a single Excel worksheet
3. Name this worksheet ‘Raw Data’
Then LEAVE IT ALONE !!!

3.
Tip 1 – Plan Ahead

4.
Tip 2 – Version Control Your Data Set
Version 1
Version 2
Version 3
…and more…

5.
Tip 3 – Obey the Holy Trinity of Data Cleaning
EXTRACT
TRANSFORM LOAD
Copy your data to
a spare worksheet 1
Clean in
isolation 2
Return it to the
latest version3

6.
Tip 4 – Automate Your Data Cleaning

7.
Tip 5 – Cleanse Your Karma
Report errors back to the original source

8.
Bonus Tip – Back Up

9.
Thank You
Get more kick ass data ninja skills here:
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bit.ly/5TipsDataCleaning