APA Feature Engineering

HOME

PROJECT OVERVIEW

PROJECT FINDINGS

PROJECT MANAGEMENT

DOCUMENTATION

FEATURE ENGINEERING

Subject Line weightage: We will be using subject line weightage as one of the components in determining how important and relevant a single email exchange is to the business. Our approach will be as follows:

1. First run an analysis on all the terms occurring in the entire dataset

• This analysis will filter out common words, prepositions and other unimportant words that could potentially skew the results.
• The analysis will return a listen of words along with the frequency of the term’s occurrence in the dataset.

1. Based on the results obtained, we would like to calculate the tf-idf of each term.

• tf: how often does the term occur in the document
• idf: how often does the term occur in other documents
• tf-idf will allow us to find the most important terms in the set of documents

1. Using the value of this tf-idf, we will assign each term a weightage based on how important it is in determining the importance to the business
2. Each subject line of an email will then have an aggregated weightage of the terms appearing in itself.

Email Exchange Ratio:
This metric will show the number of emails exchanged between the two employees as a ratio of the total number of emails exchanged by these employees.

• isForward?: Will indicate whether the email was forwarded to the recipient
• isReply?: Will indicate whether the email was a reply