What Is Technical Debt Tech debt definition: ├─ Code that works but is costly ├─ Shortcuts taken for speed ├─ Outdated patterns/libraries ├─ Missing tests ├─ Poor architecture decisions ├─ Accumulated 'TODO' comments Tech debt isn't bad code: ├─ Sometimes intentional (ship fast) ├─ Sometimes accidental (learning) ├─ Always needs management ├─ Interest accrues over time Tech debt = Loan against future.
The Interest Problem Tech debt has interest: ├─ Week 1: Workaround takes 2 hours ├─ Week 4: Now takes 4 hours ├─ Week 8: Now takes 8 hours ├─ Week 12: New features blocked ├─ Week 16: 'We need to rewrite' Debt compounds: ├─ Each shortcut makes next harder ├─ Developers work around problems ├─ Workarounds create more debt ├─ Eventually: System collapse Pay debt early. Interest is expensive.
Types of Tech Debt Categories: ├─ Code Debt │ └─ Duplicate code, complex functions │ └─ Hard to understand, modify ├─ Architecture Debt │ └─ Wrong patterns, tight coupling │ └─ Can't scale, can't change ├─ Test Debt │ └─ Missing tests, flaky tests │ └─ Fear of change, bugs ship ├─ Dependency Debt │ └─ Outdated libraries, security issues │ └─ Breaking changes pile up ├─ Documentation Debt │ └─ Missing docs, wrong docs │ └─ Onboarding slow, mistakes repeat Different types, same solution: Track and pay down systematically. Tracking Tech Debt Create debt inventory: ├─ [Tech Debt] Refactor auth module │ ├─ Type: Architecture │ ├─ Impact: High (blocks SSO feature) │ ├─ Effort: 24 hours │ ├─ Interest: 2 hours/sprint additional work │ └─ Age: 6 sprints ├─ [Tech Debt] Update React to v18 │ ├─ Type: Dependency │ ├─ Impact: Medium (security patches) │ ├─ Effort: 16 hours │ ├─ Interest: Accumulating vulnerability │ └─ Age: 8 sprints Visible inventory.
Prioritize intelligently. Debt Scoring System Prioritize with scores: ├─ Impact: How much does it hurt?
│ └─ 1-5 scale ├─ Effort: How hard to fix? │ └─ 1-5 scale (inverse) ├─ Interest: How fast is it getting worse?
│ └─ 1-5 scale ├─ Age: How long has it existed? │ └─ Factor in staleness Score = (Impact x Interest) / Effort High score = Fix first.
Quick wins: High impact, low effort. Sprint Budget for Tech Debt Allocate time: ├─ Sprint capacity: 100 hours ├─ Features: 70 hours (70%) ├─ Tech debt: 20 hours (20%) ├─ Buffer: 10 hours (10%) Consistent allocation: ├─ Every sprint pays down debt ├─ Debt doesn't accumulate ├─ Developers not frustrated ├─ Codebase stays healthy 20% is sustainable.
Adjust based on debt level. Tech Debt Sprints Alternative approach: ├─ Normal sprint: Features only ├─ Debt sprint (every 4th): Debt only ├─ 25% of time to debt ├─ Focused attention ├─ Deep refactoring possible When to use: ├─ Debt requires large contiguous work ├─ Team needs focus for refactoring ├─ Mixed sprints feel fragmented Both approaches work.
Choose what fits. Making Debt Visible Board visibility: ├─ To Do │ ├─ [Feature] User dashboard │ ├─ [Feature] Export API │ ├─ [Tech Debt] Refactor auth │ └─ [Bug] Login timeout ├─ In Progress │ ├─ [Feature] Payment flow │ └─ [Tech Debt] Update Node to 18 Everyone sees: ├─ Debt exists ├─ Debt is being addressed ├─ Balance of work types Transparency builds trust.
Preventing New Debt Debt prevention: ├─ Code review standards │ └─ No shortcuts approved ├─ Definition of Done │ └─ Tests required │ └─ Docs updated ├─ Architecture reviews │ └─ Big changes reviewed ├─ Dependency policy │ └─ Regular updates scheduled 'Intentional' debt: ├─ Documented why ├─ Ticket created immediately ├─ Timeline to pay back ├─ Approved by team Take debt consciously. Not accidentally.
Refactoring as Features Reframe for stakeholders: ├─ Wrong: 'We need to refactor' ├─ Right: 'Improve system reliability' Sell the outcome: ├─ 'Reduce page load from 3s to 1s' ├─ 'Enable mobile app development' ├─ 'Prevent outages like last month' ├─ 'Ship features 2x faster' Stakeholders fund outcomes. Not technical activities.
Debt and Velocity Velocity decline = Debt signal: ├─ Sprint 1: 50 points ├─ Sprint 5: 45 points ├─ Sprint 10: 35 points ├─ Sprint 15: 25 points ├─ Cause: Accumulated debt Track correlation: ├─ Velocity declining? ├─ Debt inventory growing?
├─ Time per feature increasing? ├─ Bug rate climbing?
Data supports debt paydown requests. Debt Paydown Patterns Strategies: ├─ Boy Scout Rule │ └─ Leave code better than found │ └─ Small improvements always ├─ Opportunistic Refactoring │ └─ Refactor when touching area │ └─ Part of feature work ├─ Dedicated Time │ └─ Budget percentage each sprint │ └─ Systematic paydown ├─ Debt Sprints │ └─ Periodic all-debt sprints │ └─ Major refactoring Combine approaches.
Migration Tracking Large migrations: ├─ Epic: Migrate to PostgreSQL │ ├─ Task: Audit current queries │ ├─ Task: Set up PostgreSQL instance │ ├─ Task: Migrate users table │ ├─ Task: Migrate orders table │ ├─ Task: Update ORM configuration │ ├─ Task: Test data integrity │ └─ Task: Switch production traffic │ │ Progress: 3/7 tasks (43%) │ ETA: 4 more sprints Track like features. Visibility through board.
Tech Debt Retrospectives Quarterly review: ├─ What debt did we pay? ├─ What debt did we create?
├─ Net position improved? ├─ What's blocking paydown?
├─ Adjust budget if needed? Review questions: ├─ Are we faster or slower than last quarter?
├─ What's our biggest debt item? ├─ What would we pay off if we had 2 weeks?
Communication to Leadership How to explain tech debt: ├─ Use financial metaphor │ └─ 'We borrowed time, now paying interest' ├─ Show impact on delivery │ └─ 'Features taking 2x longer' ├─ Quantify cost │ └─ 'Debt costs us 15 hours/sprint' ├─ Propose solution │ └─ '20% allocation for 6 months' ├─ Show progress │ └─ 'Debt inventory reduced 30%' Data beats complaints. When to Rewrite Rewrite signals: ├─ Debt > 60% of system ├─ Adding features takes weeks ├─ Bugs appear faster than fixed ├─ Nobody understands the code ├─ Technology is obsolete Before rewriting: ├─ Document what works ├─ Understand why debt accumulated ├─ Plan to not repeat ├─ Consider incremental replacement Rewrite is last resort.
Usually means debt was ignored too long. Getting Started 1.
Sign up GitScrum ($8.90/user, 2 free) 2. Create 'Tech Debt' label 3.
Inventory known debt items 4. Score and prioritize 5.
Allocate 20% of sprint to debt 6. Track paydown over time 7.
Celebrate improvements Manage debt like finances. Track, budget, pay down.
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