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
- StrategyBeginnerNew
Redesign Sales Incentives for a Scaling Software Company
Using the anonymized monthly sales-performance dataset and the company background and current-plan case file you are given, design a single replacement commission plan for the s…
- Incentive Design
- Compensation Analysis
- Sales Strategy
Open coursework - StrategyBeginnerNew
Negotiate a Retail Alliance for a Seoul Skincare Brand
Using only the materials provided, build a negotiation strategy that Soo-jin Park can take into talks with Daehan Drug Mart. Read the partnership file to understand the relation…
- Batna Analysis
- Distributive Bargaining
- Integrative Negotiation
Open coursework - DesignBeginnerNew
Redesign Weekly Production Scheduling for a Munich Craft Brewery
Using the historical demand dataset, the production-constraints specification, and the current-operations snapshot provided, design a single weekly production schedule for the t…
- Process Analysis
- Capacity Planning
- Scheduling
Open coursework - AnalysisBeginnerNew
Field Study: Fixing Order Fulfillment at a Cosmetics Startup
Using the order-fulfillment log dataset and the company case file provided to you, map how an order moves from placement to dispatch today and pinpoint where errors and delays a…
- Process Mapping
- Lean
- Quality Management
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
- CodeBeginnerNew
Optimizing Last-Mile Delivery for a Lisbon Grocery Startup
Your task is to build a linear programming model (or heuristic) to assign orders to vehicles and sequence deliveries. Success means reducing average route length by at least 15%…
- Linear Programming
- Python
- Route Optimization
Operations Analytics and Optimization - AnalysisBeginnerNew
Optimizing Last-Mile Delivery for a San Francisco Grocery Startup
Your task is to formulate a minimum-cost flow problem for daily delivery routes. Use the provided order data (locations, time windows, volumes) and vehicle specs (capacity, spee…
- Linear Programming
- Network Flow
- Python
Operations Research and Optimization - AnalysisBeginnerNew
Redesign Glow Naturals' Mumbai Last-Mile Delivery Network
Using the delivery records in 'GN-DELIVERY-LOG', the operational account in 'GN-OPS-FILE', and the unit costs and constraints in 'GN-COST-AND-CONSTRAINTS', diagnose where Glow N…
- Route Optimization
- Cost Benefit Analysis
- Supply Chain Design
Open coursework - StrategyBeginnerNew
Rebuild Motivation for a Remote Enterprise Sales Team
Using the team context dossier, the leadership strategy memo, and the quarterly engagement and performance snapshot provided to you, design a motivation system for the remote en…
- Motivation Theory
- Remote Team Management
- Goal Setting
Open coursework - Browse challenges
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Marketing Analyst
Plan and measure campaigns that grow the business. Funnel analytics, attribution, segmentation, and the rigorous measurement that lets marketing defend its budget at the leadership table.
- StrategyBeginnerNew
Design a Weekly Dynamic Pricing Strategy for GlowVienna
Design a weekly dynamic pricing strategy for GlowVienna's flagship serum that the team could realistically operate. Ground your work in the three materials provided: the histori…
- Pricing Strategy
- Demand Forecasting
- Data Analysis
Open coursework - AnalysisBeginnerNew
Commercial Due Diligence on a Seoul Direct-to-Consumer Cosmetics Brand
Working only from the materials provided, build a commercial due diligence assessment of GlowUp Cosmetics. Use the customer cohort dataset to reconstruct retention curves, lifet…
- Commercial Due Diligence
- Customer Analytics
- Unit Economics
Open coursework - StrategyBeginnerNew
Diversify Raw-Material Sourcing for a Boston Natural-Cosmetics Brand
Working from the supplier portfolio dataset and the leadership situation memo provided to you, build a strategic sourcing plan for GlowUp Naturals' key raw materials. Use the da…
- Strategic Sourcing
- Supplier Evaluation
- Risk Management
Open coursework - StrategyBeginnerNew
Launch a Direct-to-Consumer Subscription Box for a Skincare Brand
Using the twelve-month order-history dataset, derive which products repeat buyers actually return for and what each item costs versus what it sells for, so your curation and mar…
- Product Design
- Pricing Strategy
- Customer Journey Mapping
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
- ResearchBeginnerNew
Optimizing Onboarding for a Fintech App
Your task is to analyze the current onboarding flow, identify drop-off points, and propose a redesigned onboarding experience. You will use user behavior data (provided in a sim…
- User Research
- Ux Design
- Data Analysis
Product Management - 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
Programming for Business Applications - 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
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
Quality and Productivity Management - 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 - 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
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 - 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
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From brief to credential, in six steps.
Step 01
Browse challenges aligned to your studies.
Step 02
Accept the one that fits your goals.
Step 03
Work through it with AI Copilot guidance.
Step 04
Submit for structured evaluation.
Step 05
Earn a verified credential.
Step 06
Add it to LinkedIn with one click.
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