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
- DesignBeginnerNew
Scaling a Sydney D2C Cosmetics Startup's Data Pipeline
You are tasked with designing a cloud-based data pipeline for GlowUp. The pipeline must ingest real-time user events (page views, purchases, returns) from web and mobile apps, p…
- Cloud Computing
- Apache Spark
- Nosql
Open coursework - DesignBeginnerNew
Design a Farm-to-Garment Traceability System for GreenWeave Cotton
Working only from the materials provided, build a feasible traceability design for GreenWeave. Read the batch case file (M1) to trace how one organic cotton lot moved through fa…
- Blockchain
- Supply Chain
- Tokenization
Open coursework - AnalysisBeginnerNew
Redesign GlowCycle's Subscription Pricing to Cut Skincare Churn
Using only the GlowCycle subscription dataset and the company context file provided with this challenge, design a new tiered subscription pricing structure that reduces monthly …
- Customer Segmentation
- Predictive Modeling
- Prescriptive Analytics
Open coursework - StrategyBeginnerNew
Simulation-Based Customer Success Staffing Plan for Flowly
Using the historical ticket log, the growth-scenarios brief, and the current-operations and service-level specification provided to you, build a discrete-event simulation of Flo…
- Simulation
- Capacity Planning
- Scenario 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
- AnalysisBeginnerNew
Fair Trade Sourcing for a San Francisco D2C Cosmetics Brand
You are a junior sustainability consultant hired by GlowRoot. Evaluate the current sourcing cost, the cooperative's request (a 15% price increase), and the impact on product pri…
- Stakeholder Analysis
- Cost Benefit Analysis
- Ethical Decision Making
Open coursework - DesignBeginnerNew
Optimizing Inventory for a Toronto D2C Cosmetics Brand
Your task is to design a multidimensional data model (star schema) for inventory management, create an ETL pipeline to load sample data (provided as CSV files), and develop an O…
- Data Warehousing
- Etl
- Olap
Open coursework - AnalysisBeginnerNew
Sales Performance Analysis for a 40-Person SaaS Scale-Up
You will receive a dataset containing 500+ sales opportunities with fields like deal value, stage, source, close date, and account size. Your challenge is to design a data mart …
- Data Warehousing
- Etl
- Olap
Open coursework - StrategyBeginnerNew
Redesign TaskFlow's Pricing to Win Enterprise Customers
Using the company brief, the current-accounts dataset, and the enterprise-requirements brief provided, design a new pricing-and-packaging strategy for TaskFlow that adds enterpr…
- Pricing Strategy
- Packaging Design
- Product Led Growth
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
Reducing Turnover at a Dubai D2C Cosmetics Startup
Conduct a qualitative and quantitative analysis of turnover data (provided in a simulated dataset), including exit interview themes and engagement survey scores. Identify the to…
- Turnover Analysis
- Job Crafting
- Engagement Surveys
Open coursework - StrategyBeginnerNew
Plan TaskFlow's Enterprise Entry Against Established Rivals
Working from the TaskFlow company dossier, the enterprise win/loss deal records, and the competitor intelligence pack provided to you, build a strategy for entering the enterpri…
- Competitor Analysis
- Game Theory
- Go To Market Strategy
Open coursework - StrategyBeginnerNew
Growth Strategy for an Amsterdam D2C Cosmetics Startup
Your task is to analyze GlowUp Naturals' current performance, assess the offline retail opportunity (e.g., partnerships with Sephora or independent boutiques), and propose a pha…
- Market Analysis
- Financial Modeling
- Channel Strategy
Open coursework - StrategyBeginnerNew
Design Wealthsimple's Innovation Ecosystem Strategy
Using only the materials provided, examine Wealthsimple's current ability to innovate and decide what kind of innovation ecosystem it should build. Read the innovation audit mem…
- Ecosystem Mapping
- Open Innovation
- Corporate Venturing
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
- StrategyBeginnerNew
Revamping Loyalty for a Mexico City D2C Cosmetics Brand
You are hired as a marketing analyst. Analyze Brillo Natural's existing customer data (provided in a simulated dataset) to identify purchase patterns and decision triggers. Prop…
- Consumer Psychology
- Segmentation
- Loyalty Program Design
Open coursework - AnalysisBeginnerNew
Capital Budgeting for a Munich D2C Cosmetics Expansion
Your task is to build a discounted cash flow model comparing the two expansion strategies over a 5-year horizon. You must estimate initial investment, projected revenues, operat…
- Discounted Cash Flow
- Net Present Value
- Internal Rate Of Return
Open coursework - AnalysisBeginnerNew
Cost of Capital and Capital Structure for a Renewable Energy Firm
Your task is to estimate GreenGrid's current cost of equity using CAPM (risk-free rate 2%, market risk premium 6%, beta 1.2), cost of debt (4.5% pre-tax), and tax rate (22%). Th…
- Wacc
- Capm
- Capital Structure
Corporate Finance - AnalysisBeginnerNew
Optimize Capital Structure for an Austin Cosmetics Startup
Using the company financial profile and the comparable-companies dataset provided to you, model how different debt-to-equity mixes change the firm's weighted average cost of cap…
- Capital Structure Analysis
- Wacc Calculation
- Modigliani Miller
Open coursework - StrategyBeginnerNew
Build a Credible ESG Governance Framework for Glow & Green
You are a junior ESG consultant engaged by Glow & Green. Using only the de-identified company case file (gg-case-file), the investor ESG demand memo (investor-esg-memo), the cus…
- ESG Frameworks
- Stakeholder Analysis
- Governance Design
Open coursework - AnalysisBeginnerNew
Field-Valuing a Paris Subscription Cosmetics Scale-Up
Investigate using ONLY the supplied materials and the public sources listed in them. First, read the company data pack (case-file) to extract historical revenue, margins, subscr…
- DCF Valuation
- Comparable Company Analysis
- Financial Modeling
Open coursework - AnalysisBeginnerNew
Recommend a Payout Policy for a Mature Data Analytics Firm
Work only from the two items in the provided materials: the DataStream Inc. financial case file and the peer payout dataset. Using the case file, calculate the effect of each op…
- Dividend Policy
- Share Buyback Analysis
- Capital Structure
Open coursework - AnalysisBeginnerNew
Resolving Cross-Cultural Conflict in a Global SaaS Remote Team
Your task is to conduct a cultural conflict analysis using frameworks like Trompenaars and Hofstede, identify root causes, and design a team intervention (e.g., a virtual worksh…
- Conflict Resolution
- Cultural Analysis
- Remote Team Management
Cross-Cultural Management - StrategyBeginnerNew
Plot a Diversification Path for a Nairobi Skincare Brand
Using the founder's company case file, the product portfolio sales dataset, and the category attractiveness readout provided to you, run a portfolio analysis (the BCG growth-sha…
- Portfolio Analysis
- Market Research
- Strategic Thinking
Open coursework - AnalysisBeginnerNew
Optimizing Ad Spend for a D2C Cosmetics Brand
You are a data analyst at Glow & Grow. Using the provided dataset (simulated), perform an exploratory data analysis to understand trends in ad performance. Build a regression mo…
- Data Analysis
- Regression
- Data Visualization
Open coursework - AnalysisBeginnerNew
AI-Powered Customer Sentiment Analysis for a Fintech App
You will receive a dataset of 500+ anonymized app reviews and tweets. Using AI tools like ChatGPT or Claude, you must craft prompts to classify sentiment (positive, negative, ne…
- Prompt Engineering
- Sentiment Analysis
- Data Visualization
Open coursework - DesignBeginnerNew
Optimizing Inventory for a São Paulo D2C Cosmetics Brand
You are given a CSV file with raw sales, inventory, and supplier data. Your task is to design an E/R diagram, create the normalized relational schema in 3NF, populate it with sa…
- SQL
- Database Design
- Normalization
Open coursework
How it works
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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