Bugs Are Inevitable
One company let a payment system bug slip through: 50K₽ in losses, reputation destroyed.
Another invested 100K₽ in testing: avoided the problem. A day's work saved everything.
Why Bugs Are Unavoidable
A developer can't anticipate every scenario.
Types of Testing
| Type | Catches | When | |------|---------|------| | Unit | Function-level errors | Per module | | Integration | Conflicts | After integration | | Regression | Returned bugs | Before release | | UI/UX | Usability issues | Before launch | | Load | Crashes under load | Before production | | Security | Vulnerabilities | Critical systems |
The Economics
IBM research: fixing a bug during development costs 6× less than fixing it after deployment.
Testing: 15–30% of development cost. Savings: 10× on bug fixes.
Frog Studios uses combined testing on every project.