Data Sciences Challenges
Explore data science challenges on Ewance to build skills employers expect from analysts and ML engineers. Work through challenges on data cleaning, exploratory analysis, modeling, and storytelling with data.
Most Popular
- CodeBeginnerNew
Building a Customer Segmentation Tool for a SaaS Scale-up
You are provided with a JSON file containing user data: user_id, total_logins, days_since_last_login, features_used (count), subscription_tier (free/basic/premium). Your task is…
- Python
- Pandas
- Scikit Learn
Open coursework - StrategyBeginnerNew
Diagnose and Redesign Project Flow at Brillo Natural
Treat Brillo Natural as a field site you must study before you prescribe. Using only the internal observation notes in the case file ('brillo-observation-notes') and the launch-…
- Agile Methodologies
- Stakeholder Analysis
- Change Management
Open coursework - AnalysisBeginnerNew
Tax Strategy for a Copenhagen D2C Cosmetics Startup
Your task is to research the EU VAT rules for cross-border e-commerce, including the One Stop Shop (OSS) scheme. You must evaluate the tax rates in Denmark, France, Italy, and S…
- Tax Analysis
- EU Vat
- Cross Border Ecommerce
Open coursework - AnalysisBeginnerNew
Reducing Defect Rate in Stockholm D2C Cosmetics Production
Your task is to collect and analyze production data (provided in a simulated dataset) to identify root causes of defects. Use control charts (X-bar and R) and process capability…
- Statistical Process Control
- Process Capability Analysis
- Root Cause Analysis
Open coursework Practice your coursework on real scenarios.
Every challenge is shaped from real-world context — not generic exercises. The work mirrors what your degree prepares you for.
Why Ewance
- StrategyBeginnerNew
Design a Hybrid Sales Strategy for GlowUp Naturals
Design a six-month sales strategy that takes GlowUp Naturals from selling only direct-to-consumer to a blended model adding retail partnerships and business-to-business corporat…
- Sales Planning
- Negotiation
- CRM
Open coursework - DesignBeginnerNew
Design EcoRide+, a Smart Subscription Service for Tokyo Micro-Mobility
Design the EcoRide+ premium subscription service and present it as a complete proposal the founding team can act on. Ground every decision in the materials you are given: the Ec…
- Service Design
- Customer Journey Mapping
- Service Blueprint
Open coursework - AnalysisBeginnerNew
Impact Measurement for a San Francisco D2C Cosmetics Brand
Your task is to develop a comprehensive impact measurement framework for GlowRoot. You will identify relevant metrics (e.g., carbon footprint reduction, trees planted, customer …
- Impact Measurement
- Social Return On Investment
- Data Analysis
Social Entrepreneurship and Impact - AnalysisBeginnerNew
Lower TikTok Acquisition Costs for a Direct-to-Consumer Cosmetics Brand
Working only from the materials provided, diagnose what makes some of the brand's TikTok ads far cheaper to convert than others and recommend how to reshape future creative. Sta…
- Web Scraping
- Content Analysis
- Data Visualization
Open coursework - Browse challenges
Explore role
Product Manager
Ship product that solves real user problems. Combine user research, prototyping, and stakeholder alignment to turn ambiguous briefs into measurable wins — the role at the centre of modern software teams.
- AnalysisBeginnerNew
Decode Reddit Sentiment for EcoWear's Biodegradable Sneaker Launch
Working only from the provided materials, reconstruct and interpret the public conversation around EcoWear's launch. Use the EcoWear Launch Dossier to ground yourself in the tim…
- Web Scraping
- Sentiment Analysis
- Topic Modeling
Open coursework - StrategyBeginnerNew
Rebuild GlowLagos's Organic Instagram Engagement Strategy
Using the GlowLagos 90-post-audit dataset, the GlowLagos brand brief, and the competitor snapshot, audit the brand's recent Instagram activity and explain why the engagement rat…
- Social Media Audit
- Content Strategy
- Instagram Marketing
Open coursework - AnalysisBeginnerNew
Requirements Elicitation for a Sustainable Fashion Platform
Conduct stakeholder interviews (simulated via provided personas) and create a requirements specification. Include functional and non-functional requirements, user stories, accep…
- Requirements Elicitation
- User Stories
- Acceptance Criteria
Software Engineering and Quality Assurance - AnalysisBeginnerNew
Diagnose and Optimize Inventory for a Milan Cosmetics Brand
Work only from the two materials you are given: a daily sales dataset covering the past twelve months for the ten products, and a parameters brief listing each product's price, …
- Excel Modeling
- Vba Programming
- Demand Forecasting
Open coursework Build a verifiable portfolio.
Submissions become evidence. Reviewers with shipping experience score against a rubric; the result becomes a credential anyone can verify.
Why Ewance
- DesignBeginnerNew
Pricing Optimization for a Sustainable Fashion Brand
You are provided with historical sales data for similar products, including price, quantity sold, and cost. For each new product, you have estimated demand curves (linear or con…
- Excel Modeling
- Vba Programming
- Optimization
Spreadsheet Modeling and VBA - StrategyBeginnerNew
Scenario Planning for a London Direct-to-Consumer Cosmetics Brand
Your analysis task is to read the four working materials supplied and turn them into a usable foresight package. Start from the GlowLondon company record and the marketing perfo…
- Scenario Planning
- Uncertainty Analysis
- Strategic Thinking
Open coursework - AnalysisBeginnerNew
Rule on TaskFlow's Enterprise Landing Page A/B Test
Working only from the test results dataset and the test-setup brief in the provided materials, determine whether the redesigned page genuinely improves the demo-booking conversi…
- Hypothesis Testing
- A B Testing
- Chi Square Test
Open coursework - StrategyBeginnerNew
Revitalizing a Legacy Retailer's Digital Strategy
Your task is to conduct an industry analysis using Porter's Five Forces, assess the company's internal resources via a VRIO framework, and develop a strategic recommendation for…
- Industry Analysis
- Competitive Strategy
- Digital Transformation
Open coursework - StrategyBeginnerNew
Design a Talent Retention Strategy for Lueur Cosmetics
Using the Lueur Company Context Brief, the Exit Interview Records dataset, the Engagement Survey Results dataset, and the Current Rewards & Budget Sheet, design a talent retenti…
- Talent Retention
- Hr Analytics
- Strategic Hrm
Open coursework - StrategyBeginnerNew
Diversification Strategy for a Regional Brewery Chain
Your task is to identify and evaluate three diversification opportunities for Prairie Brews: (1) launching a line of non-alcoholic craft beverages, (2) opening a chain of beer-t…
- Diversification Analysis
- Financial Modeling
- Market Research
Open coursework - AnalysisBeginnerNew
Optimizing Last-Mile Delivery for a New York D2C Cosmetics Brand
Your task is to evaluate the startup's current last-mile delivery operations using the SCOR model and propose improvements. Constraints: no capital expenditure for a private fle…
- Supply Chain Analysis
- Scor Model
- Logistics Optimization
Open coursework - StrategyBeginnerNew
UK Market Entry Strategy for GlowDublin Cosmetics
Develop a complete go-to-market strategy for GlowDublin's launch in the United Kingdom, working only from the materials you have been given: the GlowDublin company snapshot (its…
- Market Analysis
- Competitive Analysis
- Go To Market Strategy
Open coursework - DesignBeginnerNew
Design a Lightweight ESG Framework for a Cosmetics Startup
Using the Lumora company case file and the supply-chain and operations dataset provided, design a lightweight ESG framework Lumora can run in-house. Your proposal must: (1) iden…
- ESG Scoring
- Materiality Assessment
- Sasb Standards
Open coursework - AnalysisBeginnerNew
Greening the Munich D2C Cosmetics Supply Chain
Your task is to conduct a life cycle assessment (LCA) of Glow Naturals' best-selling moisturizer, identify the biggest environmental hotspots, and recommend changes in sourcing,…
- Life Cycle Assessment
- Circular Economy
- Supply Chain Analysis
Open coursework - AnalysisBeginnerNew
Topic Modeling for Sustainable Fashion Brand's Social Media
You are given a dataset of 50,000 social media posts (text only) mentioning EcoWear. Your task is to preprocess the text, apply an unsupervised topic modeling technique (e.g., L…
- Topic Modeling
- Text Mining
- Lda
Open coursework - AnalysisBeginnerNew
Tax-Efficient Legal Form for a Nairobi D2C Cosmetics Startup
Students will receive financial projections for GlowUp Naturals (KES 50 million revenue, KES 35 million expenses, projected growth to KES 200 million in 3 years). They must calc…
- Income Tax Calculation
- Corporate Tax
- Trade Tax
Open coursework
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Step 01
Browse challenges aligned to your studies.
Step 02
Accept the one that fits your goals.
Step 03
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Step 04
Submit for structured evaluation.
Step 05
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Step 06
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