Managing Technical Debt
Technical debt is the implied cost of rework caused by choosing an easy solution now instead of using a better approach that would take longer. Like financial debt, it accrues interest over time.
Types of Technical Debt
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| TYPES OF TECHNICAL DEBT |
+---------------------------------------------------------+
| |
| INTENTIONAL / PRAGMATIC |
| - Deliberate trade-off for speed |
| - Known shortcut to meet deadline |
| - "We'll fix it later" |
| |
| INTENTIONAL / RECKLESS |
| - "We don't have time for design" |
| - "It would be nice to have tests" |
| |
| UNINTENTIONAL / PRAGMATIC |
| - "Now we know a better approach" |
| - Learning from experience |
| |
| UNINTENTIONAL / RECKLESS |
| - "What's layering?" |
| - Lack of knowledge or skill |
| |
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The Debt Metaphor
Technical Debt = Principal + Interest
Principal: The cost to fix the shortcut now
Interest: The ongoing cost of working around the shortcut
Example:
- Quick fix takes 2 hours (principal)
- Each week it causes 30 min of extra work (interest)
- After 6 months: 2 + (26 * 0.5) = 15 hours total cost
- Proper fix would have taken 8 hours
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| Debt Level | Fix Now | Wait 6 Months | Wait 1 Year |
| -----------|---------|---------------|----------------|
| Low | 4 hrs | 10 hrs | 16 hrs |
| Medium | 8 hrs | 30 hrs | 60 hrs |
| High | 16 hrs | 80 hrs | 200 hrs |
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Managing Debt
- Track technical debt in your issue tracker
- Allocate a percentage of each sprint to debt reduction
- Refactor opportunistically when touching related code
- Prioritize debt that affects velocity or causes bugs
- Communicate debt impact to stakeholders
Key Takeaways
- Technical debt is natural but must be managed
- Interest grows over time — the longer you wait, the more expensive it becomes
- Track debt like you track financial debt
- Balance speed with sustainability