People and processes for data management and analytics
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Cathy O’Neil, Lead Data Scientist. People and Processes for data management and analytics. When do you need a data scientist?. When you have too much data for Excel to handle. When do you need a data scientist?. When your data visualization skills are being stretched.

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People and Processes for data management and analytics

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Cathy O’Neil, Lead Data Scientist

People and Processes for data management and analytics


Whendo you need a data scientist?


When you have too much data for Excel to handle

When do you need a data scientist?


When your data visualization skills are being stretched

When do you need a data scientist?


When you aren’t sure if something is noise or information

When do you need a data scientist?


When you don’t know what a confidence interval is

When do you need a data scientist?


Let’s take a step back:Shouldyou need a data scientist?


Are you asking the right questions?

Should you need a data scientist?


Are you getting the most out of your data?

Should you need a data scientist?


Are you anticipating shocks to your business?

Should you need a data scientist?


Are you running your business sufficiently quantitatively?

Should you need a data scientist?


So, you’ve decided to hire a Data Scientist (nice move!)


What do you need to get started?


Data storage

What do you need to get started?


Data access — usually through a database (payoffs for different types)

What do you need to get started?


Larger-scale or less uniform data may require Hadoopaccess (and someone with real tech expertise to set it up)

What do you need to get started?


Who and how should you hire?


A math major? Perhaps a Masters in statistics? Or a Ph.D. in machine learning?

Who and how should you hire?


What should the job description include?

Who and how should you hire?


Who even interviewssomeone like this?

Who and how should you hire?


What does a Data Scientist want from you?


Interesting, challenging work

What do they want from you?


Lots of great data (data is sexy!)

What do they want from you?


To be needed, and to have central importance to the business

What do they want from you?


To be part of a team that is building something

What do they want from you?


A good and ethically sound work atmosphere

What do they want from you?


Cash money

What do they want from you?


Further business reasons for hiring a Data Scientist


Reporting help

Further business reasons


Reporting help


Enables you to see into data without taxing your tech team (beyond setup)

Further business reasons


A/B testing

Further business reasons


Beyond A/B testing: adaptability and customization

Further business reasons


Knowing whether numbers are random (seasonality) or require action

Further business reasons


What-if analysis

Further business reasons


Help with business planning:Will there be enough data toanswer a given question?Will there be enough data tooptimize on the answer?

Further business reasons


Education for senior management

Further business reasons


Mathematically sound communication to clients

Further business reasons


Case Study: Stress Tests


We can learn from finance — data miners are spoiled for data

Case Study: Stress Tests


You know how big changes will affect your business directionally and specifically

Case Study: Stress Tests


Stress tests allow you to combinechanges and estimate quantitatively

Case Study: Stress Tests


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