---
name: portfolio-case-study-writer
description: "สกิลสำหรับ Portfolio CASE Study Writer ใช้เมื่อต้องการแนวทาง ขั้นตอน Template หรือคำแนะนำเชิงปฏิบัติสำหรับงานผู้ประกอบการ ธุรกิจ โปรดักต์ การเงิน ลูกค้า และการเติบโต ในหัวข้อนี้"
---

# Portfolio CASE Study Writer

## When to Use This Skill

Use this skill when the user:
- Wants to create portfolio case studies
- Needs to expand resume bullets into detailed writeups
- Is building a portfolio website
- Wants to showcase project work in depth
- Mentions: "case study", "portfolio", "project writeup", "work samples", "portfolio piece"

## Core Capabilities

- Transform resume bullets into detailed case studies
- Structure case studies for maximum impact
- Create compelling project narratives
- Balance technical detail with business context
- Format for portfolio websites
- Tailor depth to audience

## Case Study Purpose

**Why Case Studies Matter:**
- Resumes show WHAT you did; case studies show HOW and WHY
- Demonstrate thinking process, not just outcomes
- Allow deeper showcase of skills
- Differentiate you from other candidates
- Required for many PM, UX, and creative roles

## The Case Study Structure

### Standard Structure

```
1. Overview (Project summary)
2. Problem (What needed to be solved)
3. Process (How you approached it)
4. Solution (What you created/delivered)
5. Results (The impact)
6. Learnings (What you'd do differently)
```

### Time to Read
- **Quick Read:** 3-5 minutes (essential for portfolio)
- **Deep Dive:** 10-15 minutes (for interested readers)

## Section-by-Section Guide

### 1. Overview Section

**Purpose:** Hook the reader, provide context

**Include:**
- Project name and company
- Your role
- Timeline
- Team size
- One-sentence summary of impact

**Example:**
```
# Portfolio CASE Study Writer

**Company:** E-Commerce Inc.
**Role:** Lead Product Designer
**Timeline:** 6 weeks
**Team:** 2 designers, 3 engineers, 1 PM

**Summary:** Reduced cart abandonment by 35% through a streamlined 3-step checkout process, generating $2M in recovered revenue.
```

### 2. Problem Section

**Purpose:** Set up why this work mattered

**Include:**
- Business context
- User pain points
- Key metrics or goals
- Constraints

**Example:**
```
## The Problem

E-Commerce Inc. was experiencing 68% cart abandonment—significantly higher than the industry average of 55%. Exit surveys and user research revealed several issues:

- **Too many steps:** Our checkout had 7 screens
- **Forced account creation:** Users had to register before purchasing
- **Hidden costs:** Shipping wasn't shown until step 5
- **Mobile friction:** Forms weren't optimized for mobile

**Goal:** Reduce cart abandonment to below 50% within 3 months.

**Constraints:**
- No changes to existing payment integrations
- Had to maintain PCI compliance
- 6-week timeline before holiday season
```

### 3. Process Section

**Purpose:** Show your thinking and methodology

**Include:**
- Research conducted
- Stakeholders involved
- Hypotheses formed
- Options considered
- Decisions made (and why)

**Example:**
```
## Process

### Research
I started by understanding the problem deeply:
- Analyzed Mixpanel funnel data for drop-off points
- Conducted 10 user interviews with recent abandoners
- Reviewed heatmaps and session recordings
- Benchmarked against 5 competitor checkout flows

**Key Insight:** 73% of drop-offs occurred at the account creation screen. Users wanted to purchase, not commit to a relationship.

### Ideation
I explored several approaches:
1. Guest checkout only (simplest)
2. Social login options (lower friction)
3. Progressive profiling (collect info over time)
4. One-page checkout (Amazon-style)

After weighing feasibility, timeline, and impact, we chose a hybrid approach...

### Decisions Made
- **Guest checkout first:** Made registration optional and post-purchase
- **Transparent pricing:** Showed shipping on the first screen
- **Mobile-first design:** Designed for mobile, then adapted for desktop
- **Progress indicator:** Added clear "Step 1 of 3" indicator
```

### 4. Solution Section

**Purpose:** Show what you actually created

**Include:**
- Visual artifacts (mockups, screenshots, diagrams)
- Key features/changes
- Technical implementation (if relevant)
- How it addressed the problems

**Example:**
```
## Solution

### The New Checkout Flow

**Before:** 7 screens with mandatory registration
**After:** 3 screens with optional guest checkout

[IMAGE: Before/After comparison]

### Key Changes

**1. Transparent Pricing Widget**
[IMAGE: Pricing widget mockup]
Showed order total, shipping, and taxes from the start. No surprises.

**2. Guest Checkout Option**
[IMAGE: Guest checkout screen]
Made account creation optional with clear value proposition for why to register.

**3. Smart Form Design**
[IMAGE: Form design]
- Single-column layout on mobile
- Auto-format for phone/card numbers
- Address autocomplete integration
- Clear error messaging

**4. Trust Signals**
Added security badges, money-back guarantee, and customer service contact throughout the flow.
```

### 5. Results Section

**Purpose:** Prove impact with data

**Include:**
- Quantitative results (with timeframe)
- Comparison to goals
- Secondary metrics affected
- Business impact

**Example:**
```
## Results

### Primary Metrics (90 days post-launch)

| Metric | Before | After | Change |
|--------|--------|-------|--------|
| Cart Abandonment | 68% | 44% | -35% |
| Checkout Completion | 32% | 56% | +75% |
| Mobile Conversion | 18% | 41% | +128% |
| Revenue per Visitor | $2.40 | $3.85 | +60% |

### Business Impact
- **$2M additional revenue** in first quarter
- **15% increase in mobile orders**
- **Customer support tickets about checkout** dropped by 45%

### Secondary Effects
- Account creation actually increased 20% (post-purchase)
- Average order value stayed stable
- Return customer rate improved
```

### 6. Learnings Section

**Purpose:** Show growth mindset and self-awareness

**Include:**
- What worked well
- What you'd do differently
- Unexpected challenges
- Skills developed

**Example:**
```
## Learnings

### What Worked
- **Early user research** prevented us from building the wrong solution
- **Cross-functional alignment** meetings kept everyone on the same page
- **Launching with analytics** let us measure impact immediately

### What I'd Do Differently
- **More A/B testing:** We launched the full redesign at once. Would have preferred to test individual changes to understand what drove results.
- **Earlier mobile focus:** We designed desktop-first then adapted. Starting mobile-first would have been more efficient.
- **Stakeholder education:** Spent too long convincing leadership. Would start stakeholder alignment earlier next time.

### Skills Developed
- Advanced Figma prototyping
- Working with A/B testing frameworks
- Presenting data-driven design decisions to executives
```

## Case Study Types by Role

### Product Manager Case Study
**Focus on:**
- Strategy and prioritization
- Stakeholder management
- Metrics and outcomes
- Technical trade-offs

### UX/Product Designer Case Study
**Focus on:**
- User research
- Design process
- Visual artifacts
- Usability improvements

### Software Engineer Case Study
**Focus on:**
- Technical architecture
- Problem-solving approach
- System design
- Code quality/performance

### Marketing Case Study
**Focus on:**
- Strategy and targeting
- Creative execution
- Channel performance
- ROI and attribution

## Visual Elements

### Must-Have Visuals
- Before/after comparisons
- Key screens or deliverables
- Process diagrams
- Results charts

### Nice-to-Have Visuals
- User journey maps
- Wireframes evolution
- Research artifacts
- Team photos

### Visual Tips
- Use consistent image sizing
- Add captions explaining each image
- Blur sensitive data if needed
- Ensure mobile-friendly image sizes

## Output Format

When creating a case study:

```markdown
# Portfolio CASE Study Writer

## Quick Facts
- **Role:** [Your role]
- **Company:** [Company]
- **Timeline:** [Duration]
- **Team:** [Team composition]
- **Impact:** [One-line result]

---

## Overview
[2-3 sentence summary of the project]

## Problem
[Context and challenges - what needed to be solved]

## Process
### Research
[What you learned]

### Approach
[How you tackled it]

### Key Decisions
[Important choices and rationale]

## Solution
[What you built/created - include visual descriptions]

### Feature 1
[Description]

### Feature 2
[Description]

## Results
[Quantified impact]

| Metric | Before | After | Change |
|--------|--------|-------|--------|

## Learnings
[Reflections and growth]

---

## Visual Asset List
[List of images/screenshots needed]
```

## Case Study Quality Checklist

- ✅ Clear problem statement
- ✅ Evidence of user/customer focus
- ✅ Process clearly explained
- ✅ Your specific contributions are clear
- ✅ Quantified results
- ✅ Visual artifacts included
- ✅ Honest about challenges/learnings
- ✅ Appropriate length (3-10 min read)
- ✅ Proofread and polished
- ✅ Can discuss in detail in interview
