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This project presents a Supermarket Sales Performance dashboard that tracks revenue, customer ratings, and monthly sales trends.
It provides clear insights into customer behavior, product performance, and payment preferences to support data-driven business decisions.
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I've been exploring two hero directions for Yow Island, an island operations management platform.
- Version A uses multiple floating product previews to highlight the platform’s range of features and create a more dynamic first impression.
- Version B focuses on one large dashboard preview for a cleaner, more product-focused experience.
Same message, different visual approach - testing which direction communicates the product more clearly.
Which one would you choose: A or B?
4 voted
80%
1 voted
20%
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Cool work !
This portfolio sample shows how I evaluate AI agents and automated workflows to find reliability problems, broken logic, and weak edge-case handling. I review whether the system completes the intended task, uses tools correctly, follows instructions, handles ambiguity, and produces an output that can actually be trusted.
The work focuses on identifying failure points before they become real user problems, including incomplete task execution, incorrect assumptions, workflow dead ends, hallucinations, and verification gaps. This is a portfolio demonstration of my AI agent evaluation and red-teaming work. No confidential client information is included.
Thorough breakdown! Robust edge-case handling and reliability checks are definitely the trickiest part of building reliable AI agents 🤖📊
HR Analytics Dashboard | Power BI
Project Overview
I built an interactive HR Analytics Dashboard in Power BI to transform employee data into meaningful workforce insights and support HR-focused decision-making.
The project covered the complete dashboard development process — from understanding and preparing the dataset to creating KPIs, developing interactive visuals, designing a custom wireframe, and building the final dashboard.
Rather than directly copying the layout from the learning tutorial I followed, I first created my own wireframe and used it as the blueprint for the final dashboard.
Tools & Skills Used
Tools:
Power BI | Power Query | DAX | Excel/CSV
Skills:
Data Cleaning | Data Transformation | Data Analysis | Data Visualization | KPI Development | Dashboard Design | DAX Measures | Data Storytelling | Business Intelligence
What I Built
The dashboard provides an overview of employee demographics, workforce composition, employee attrition, salary levels, job roles, experience, and job satisfaction.
Key KPIs include:
Total Employees
Active Employees
Attrition Count
Attrition Rate
Average Age
Average Experience
The dashboard also analyzes:
Attrition by Department
Attrition by Gender
Attrition by Age Group
Attrition by Salary Slab
Attrition by Years of Experience
Job Role and Job Satisfaction
Employee distribution across departments
The final dashboard contains 1.42K employees, 1.19K active employees, 231 attritions, and a 16.3% attrition rate based on the cleaned dataset used for the project.
Data Preparation & Power Query
One of the first things I learned from this project was that importing a dataset into Power BI does not mean the data is automatically ready for analysis.
I used Power Query to inspect and prepare the dataset before building the dashboard.
I checked the data for empty values and removed unnecessary rows. I also used Group By and Count Rows on Employee ID to investigate whether employee records appeared more than once.
This was particularly useful because I initially did not understand why the tutorial was grouping Employee IDs.
I learned that grouping an ID and counting rows can be used as a duplicate-checking technique. Filtering the count so that it does not equal 1 helps identify IDs that appear more than once and therefore require further investigation.
This helped me understand the difference between simply following a Power Query step and understanding why that step is being performed.
DAX & KPI Development
I created measures to calculate the key HR metrics used throughout the dashboard.
One of the concepts that stood out to me was Active Employees.
The dataset contains an Attrition field indicating whether an employee left the organization.
Therefore:
Attrition = Yes → employee has left
Attrition = No → employee is considered active
To calculate Active Employees, I used the employee count together with an Attrition = No filter.
This helped me understand how a column that does not directly contain the metric I need can still be used to create a meaningful KPI.
I also worked with measures for Attrition Count, Attrition Rate, Average Age, and Average Experience.
Dashboard Design
Before developing the visuals, I created a custom wireframe in my preferred design tool.
I wanted the final dashboard to have its own visual identity rather than replicate the layout of the tutorial.
I chose a purple, white, and ash/gray color palette and structured the dashboard around six KPI cards followed by analytical sections for departments, attrition, salary, age, experience, and job satisfaction.
The wireframe helped me plan the visual hierarchy, spacing, and placement of each component before recreating the design in Power BI.
This was an important part of the project because it reinforced the value of planning the user experience before building the actual dashboard.
Challenges & What I Learned
One of the biggest learning moments was understanding Attrition and how it can be used to derive other HR metrics.
Initially, I questioned why the Employee Count needed to be filtered using the Attrition column when creating the Active Employee KPI.
Understanding that Attrition = No represents employees who have not left the organization made the calculation much clearer.
I also learned more about Power BI's sorting behavior.
For example, the salary slab visual was sorted by Attrition Count in descending order, rather than by the salary categories themselves. This meant the salary slab with the highest attrition appeared first.
Understanding this helped me realize that sorting is not simply a formatting decision — it can change what information a chart emphasizes.
Another important lesson was understanding the difference between data cleaning and data validation. Finding duplicate or empty records does not automatically mean they should be deleted. The analyst needs to understand why the records exist and whether removing them is appropriate.
Outcome
This project strengthened my practical skills in:
Power BI | Power Query | DAX | Data Cleaning | Data Analysis | Data Visualization | Dashboard Design | Business Intelligence
More importantly, it helped me move beyond simply building charts and start thinking about the reason behind each transformation, calculation, and visualization.
The project reinforced my approach of:
Understand → Clean → Validate → Analyze → Visualize → Communicate
I’m continuing to build projects that demonstrate not only my technical skills, but also my ability to turn raw data into clear and useful business insights.
Learning Credit
This project was inspired by a Power BI HR Analytics tutorial that I followed as a hands-on learning exercise, while designing my own wireframe and dashboard layout.
