Home > Glossary > Certified Tester Foundation Level > Error (Mistake)

📖 What is Error (Mistake)?

A human action that produces an incorrect result. Errors often occur due to time pressure, complex code, misunderstanding of requirements, or fatigue.

🥋 Sensei Says:

"Remember the chain: Human Errors cause Defects in the code, which lead to Failures when executed. You must know this sequence perfectly!"

📚 Certification: Certified Tester Foundation Level (CTFL-v4.0)

🔑 What are the Key Concepts of Error (Mistake)?

▸ Human psychology and cognitive load in programming.
▸ Impact of ambiguous requirements on developer mistakes.
▸ Environmental factors contributing to human error (e.g., time pressure).

🎯 How does Error (Mistake) appear on the CTFL-v4.0 Exam?

A developer misunderstands a user story and writes incorrect logic. The question asks what this action is called.

Identifying the first step in the error-defect-failure chain from a given case study.

❓ Frequently Asked Questions

Can tools make errors?

In ISTQB terminology, errors are strictly human actions. Tools can have defects or cause failures, but they don't make 'mistakes' in this context.

How can we prevent errors?

By improving processes, providing clear requirements, adequate training, and reducing excessive time pressure.

Related Terms from Certified Tester Foundation Level

Static Analysis Tool Impact Analysis Validation Control Flow Graph Event Black-Box Testing

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