Pewlett-Hackard-Analysis

Project Overview

Pewlett Hackard is a large company with thousands of employees. This company is interested in upgrading from Excel/VBA to SQL to help them with the amount of data they have. As baby boomers were starting to retire at a fast rate, the Human Resources department was concerned with the number of upcoming retiring employees, so they wanted to be prepared and find out who is going to be retiring in the next few years and how many positions would need to be filled. The retiring group will have the opportunity to be part-time mentors to pass along all the knowledge they have.

Results

Total Amount of Current Employees

The image below represents the total amount of employees that are currently working for the company, which is 240,124. To get to this amount it was necessary to filter the to_date column by '9999-01-01', which is the date used for when an employee is still working for the company. This data can also be found in the Data folder as Pewlett-Hackard-Analysis/Data/total_current_employees.csv

First Result of Retiring Employees

The first result of the amount of retiring employees was achieved by filtering the employees by the birth date range between '1952-01-01' and '1955-12-31'. Which resulted in 133,776 employees representing 55.7% of the total amount of current employees.

Final Amount of Retiring Employees

The further analysis of the last query, which included looking at the CSV file with the resulted data led to the conclusion that the same was having duplicate entries on the employee number (emp_no). Upon analysis, it was possible to find out that the duplicate entries were there because employees have changed roles throughout the years, so whenever that happened a new entry was registered in the database. So, to fix the final result, the last query was modified to also add the filter on the to_date column, since that would bring back not only the current employees working for the company but also only the data entry from the job title that is still active. The final result was 72,458 as can be seen below.

This data can also be found in the Data folder as Pewlett-Hackard-Analysis/Data/unique_titles.csv

Total Amount of Retiring Employees by Job Title

After getting the total amount of employees, another table was created to separate the result by job title. That was necessary to find out if the company will have enough mentors per title. To obtain the following table, the COUNT and GROUP BY methods were applied to the title column, using the total amount of retiring employees as the reference. From the resulted table, Senior Engineer and Senior Staff were the job titles with the biggest amount of future openings.

This data can also be found in the Data folder as Pewlett-Hackard-Analysis/Data/retiring_titles.csv

Total Amount of Employees Eligible for the Mentorship Program

A select group was defined to be the eligible employees for the mentorship program and to be trained by the retiring group. The amount shown below was achieved by joining three different tables, then the to_date column was filtered by the date '9999-01-01' which represents employees that are still working for the company, and the birth_date column was filtered to display only the employees that were born between '1965-01-01' and '1965-12-31', which was the company's criteria of selection for the mentorship program. As the final result, the number was 1,549.

This data can also be found in the Data folder as Pewlett-Hackard-Analysis/Data/mentorship_eligibility.csv

Total Amount of Employees Eligible for Mentorship Program by Title

Below we can see the number of eligible employees split by their titles. Staff and Senior Engineer positions are the ones with the highest amount of potential substitutes.
The table was obtained by applying the COUNT and GROUP BY methods on the title column, using the total amount of eligible employees for the mentorship program as the reference.

This data can also be found in the Data folder as Pewlett-Hackard-Analysis/Data/mentor_elig_by_title.csv

Average of Retiring per Eligible Employees by Title

The image below shows the code used and the table resulting from it. On this joined table, we can see the total amount of retiring employees per title, amount of mentorship eligible employees per title and the average of eligible mentors per retiring employee by each job title. There are two 'null' values on the Manager title row, the reason for that is that there aren't any eligible managers to be mentors. This data can also be found in the Data folder as Pewlett-Hackard-Analysis/Data/retir_per_elig_by_title.csv

Summary

After querying and analyzing the data, it is possible to see that the total amount of employees currently working for the company is 240,124. And the huge amount of 72,458 employees is going to be retiring in the upcoming years, representing 30.2% of the total.
The number of employees eligible for the mentorship program is only 1,549. This means that even if all of those eligible ones were to be trained to substitute the retiring ones, there will still not going to be enough employees to fill up the upcoming empty positions.
When analyzing the upcoming empty positions by job title, the results have shown that the proportion of the eligible vs the retiring employees varied a lot where none of them will have enough qualified employees to substitute the upcoming empty positions. Senior Engineer and Senior Staff are the positions with the least amount of people that are going to be qualified to substitute them. Where the ratio is 63 future retirees per each eligible Senior Engineer and 84 per each Senior Staff.
Another point that the analysis shows is that there will not be any qualified Managers to take over the 2 upcoming positions.
After querying and analyzing the results it was possible to find out that the younger generation working for the company was born in 1965, which eliminates the interesting option of expanding the current criteria of getting only people born in 1965 to add people even younger than that age to be eligible for mentorship. The following image shows the query to check if there were any current employees born after 1965:

Now that the company knows the numbers and has a better idea of the proportion of the upcoming impact, in addition to the mentorship program, an option would be to start opening internship and trainee positions to hire and train new people before the impact takes place.

BiancaTaisePommerening / Pewlett-Hackard-Analysis