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Three-Stage Testing Process

publish date: 2026/05/30 21:26:57.880838 UTC

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Software validation uses a three-stage testing process. The diagram below shows the three stages. Sort them into the correct order, from first to last.

ComponentTestingSystemTestingAcceptanceTestingDefects at later stages feed back to earlier stages
System testing
Acceptance testing
Component testing

Correct Answer

(1) Component testing
(2) System testing
(3) Acceptance testing

Explanation

The three stages in order are: 1. Component testing — individual components tested by developers independently; 2. System testing — integrated system tested for interaction and interface errors; 3. Acceptance testing — tested with real customer data before operational use.

Reference

Software Engineering, Ian Sommerville, 9th edition

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