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Welcome to the Onyx Data May 2025 Challenge!
May 01 - May 29, 2025 | EDT
Build a Power BI report that tells the story of mobile sales across different regions, highlights best-selling products and trends, and helps the business understand customer behavior better.
Timeline
Workshop | How to Create Mobile Sales Power BI Report | Workshop
Workshop | How to Create Mobile Sales Power BI Report | Workshop
14 May | 07:00
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Webinar | See the Top 5 Reports Analyzing Mobile Phone Sales
Webinar | See the Top 5 Reports Analyzing Mobile Phone Sales
29 May | 08:00
01 May - 24 May
Submitted Reports
About challenge
How to participate
The Brief
Judging criteria
Timeline
Dataset
Past challenges
Winner of the challenge
All Submissions
About ZoomCharts Mini Challenge
ZoomCharts Mini Challenge is part of the global DataDNA – Dataset Challenge by Onyx Data, which unites 25K+ data enthusiasts worldwide, ranging from beginners to seasoned professionals, including Microsoft MVPs. Read more about the DataDNA challenge on the Onyx Data website. Join the community on LinkedIn
The ZoomCharts Mini Challenge provides a platform for a growing community to learn how to build PRO reports, aiding business users to explore data quickly and intuitively.
- Free License: All participants receive a free ZoomCharts Developer License that gives access to the full Drill Down PRO visuals library. License will remain active for 1 year after the challenge.
- Learn from Experienced Professionals: As part of the challenge, we host live workshops on report building and visualizing the challenge’s dataset in Power BI. Challenge participants can also book an individual consultation with an experienced Power BI mentor to ask questions and get personalized tips.
- Tailored Feedback: Every challenge submission will receive personalized feedback, giving participants the chance to hone their skills and improve their reports.
Prizes
The best report’s creator will receive a $300 Amazon gift card from ZoomCharts.
Webinar recordings
How to participate?
1. Register for the challenge:
- Register for DataDNA ZoomCharts Mini Challenge using the form above ⬆️
- Activate your free Drill Down Visuals Developer License for Power BI. Read license setup instructions.
- Download Challenge dataset from Onyx Data DataDNA website.
2. Build your report in Power BI:
- Set up an account in Power BI using the assigned license details (if you have participated in ZoomCharts Challenges in the past, you can use the same account you set up before).
- Use the account to access the full library of custom ZoomCharts Drill Down visuals.
- Use the dataset to build a Power BI report including at least 2 ZoomCharts Drill Down Visuals in one report page.
3. Improve your report and learn new skills:
- To learn more about applying ZoomCharts visuals in your reports, participate in the challenge workshop.
- If you have any questions or need advice, you can book a free individual consultation here.
- Check out the submissions from past challenges for inspiration.
4. Submit your challenge entry:
- Submit your report in .pbix format for validation using the form on this challenge page.
If your submission doesn’t match the challenge criteria, you will be notified by email indicating the reason. Don't worry if this happens! You can fix the issue and resubmit your report.
- Your report will be reviewed within 1–2 business days. Once it’s validated, you’ll receive a Publish to Web link via email. You can use this link to add the report to your portfolio or share it publicly online.
- All validated entries will also receive personalized feedback from the evaluation team via email within 1-2 business days. Use this feedback to revise your report and resubmit it before the deadline.
Note: Feel free to resubmit your entry as many times as necessary before the deadline.
5. Finalize your participation to compete for the prize
- Post the final version of your submission as a single image on your LinkedIn profile, including the tags @ZoomCharts and @OnyxData, as well as the hashtags #dataDNA and #builtwithzoomcharts.
- After posting the report on LinkedIn, please submit it to the Onyx Data DataDNA Main Challenge
- Follow ZoomCharts on LinkedIn
- Follow Onyx Data on LinkedIn
- All participants of ZoomCharts Mini Challenge need to submit reports main Onyx Data DataDNA challenge for a chance to win additional prizes.
6. Attend challenge closing webinar to hear the results:
- The submissions are evaluated by ZoomCharts team (see "Judging criteria" for more info). The submissions of Top 5 ZoomCharts Mini Challenge finalists are analyzed live during the challenge closing webinar to share the best practices and learning opportunities with the community.
- The author of the best report is rewarded with a $300 Amazon gift card from ZoomCharts.
Welcome to the Mobile Sales & Trends Analysis Challenge!
Pretend you are a data analyst for a major mobile phone retailer operating across multiple countries. You’ve been given a 2024 sales dataset, containing detailed records of mobile phone transactions, customer demographics, product specifications, and geographic locations.
The dataset combines information about the models sold, their prices, storage sizes, colors, operating systems, and customer demographics like age group and gender. It also captures where and how the sales were made – online, through partners, or in-store, and the type of payment used.
Your goal is to build a report that tells the story of mobile sales across different regions, highlights best-selling products and trends, and helps the business understand customer behavior better.
Key questions to answer in your analysis:
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Which mobile brands and models are the top sellers overall and in specific countries or cities?
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How do sales numbers vary by storage size, color, or operating system (Android vs. iOS)?
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What is the typical customer profile — age group, gender — for different brands or models?
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How do sales and revenues break down across different sales channels (online, partner, in-store) and payment types?
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Are there noticeable differences in pricing and sales volume between regions or cities?
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Which countries or cities generate the highest total revenue and units sold?
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Are there patterns in customer demographics based on mobile brand, model, or price range?
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How does sales performance change month over month in 2024?
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Are there correlations between customer age groups and the type of devices they purchase (for example, younger customers preferring certain brands)?
The questions above are provided to guide your exploration but are not mandatory. Feel free to shape your analysis based on the story you want to tell.
Technical requirements
- Build your report using only Power BI
- The number of pages in the report is not limited
- At least one report page has to contain a minimum of 2 ZoomCharts Drill Down Visuals. See a practical guide on Drill Down Visuals here
Judging criteria
Each report is evaluated based on three main criteria: intuitiveness, insightfulness, and interactivity. These factors ensure that the reports are not only accurate and functional, but also meet the target audience's needs and are ready to be presented to the end-users.
- Intuitive: How clear and easy it is to understand the report at a glance? (max 15 points)
- Is the report visually appealing?
- Choice of charts and visual elements
- Does the report tell a story?
- Is it not overwhelming to the user?
- Choice of tooltips, titles, and legends
- Interactive: How engaging and seamless is the report exploration and interaction with data? (max 15 points)
- Clear navigation that allows user to explore the report
- Use of slicers and other interactive elements
- Smooth cross-chart integration
- Is report optimized for touch devices?
- Are tutorials and guiding elements helpful to the user?
- Insightful: How accurate, complete, and meaningful is the data in driving decisions? (max 15 points)
- Depth of analysis
- Data cleaning and preparation
- Does data show up accurately in the report?
- Is report optimized for quicker loading time?
- Does the report provide deeper exploration of data (drill-down)?
Timeline
Workshop | How to Create Mobile Sales Power BI Report | Workshop
Workshop | How to Create Mobile Sales Power BI Report | Workshop
14 May | 07:00
-
Webinar | See the Top 5 Reports Analyzing Mobile Phone Sales
Webinar | See the Top 5 Reports Analyzing Mobile Phone Sales
29 May | 08:00
01 May - 24 May