Core Competencies for Software Test Engineers: Defect Lifecycle, Statuses, Roles, and Best Practices

As a software test engineer, articulating your core competitiveness during interviews requires a clear understanding of the defect lifecycle and the actions required at each stage.

1. Defect Lifecycle

Accurately describe the entire lifecycle of a defect and explain what you should do at each transition.

2. Defect Status Definitions

New (New): Newly reported defect.

Open (Open): Confirmed and assigned to a developer.

Fixed (Fixed): Developer has fixed it; awaiting verification.

Declined (Declined): Fix rejected.

Deferred (Deferred): Fixed in a future release.

Closed (Closed): Defect verified as fixed.

Understanding each status helps you know the appropriate actions and responsibilities.

3. Role Permissions

Different roles have distinct permissions: tester, test supervisor, project/technical manager, developer, etc. Knowing who is responsible for each status ensures effective communication and issue resolution.

4. Defect Management Process Highlights

Experienced testers verify defect validity and reproducibility.

Record handling information (person, time, method, comments, status).

Decisions on decline or defer should involve project manager, test manager, and product manager.

After fixing, the original tester must verify before closing.

Enhance communication between testers and developers; provide detailed steps and test cases for non‑reproducible bugs.

5. Test Case Design Standards

Select appropriate product module, case type (usually functional), applicable phase, and related requirements.

Write concise, clear titles.

Include pre‑conditions that link to the first step.

Detail steps, checkpoints, UI elements, and controls.

Specify expected results without omissions.

6. Defect Submission Standards

Choose correct module, project, affected version, priority, severity, and related requirement.

Write precise titles describing location and behavior.

Provide reproducible steps, results, expectations, and, when possible, test data, logs, or screenshots.

7. Defect Priority Definition

P1: Blocking issues; highest priority.

P2: Dependent on other functions; second priority.

P3: Independent features; addressed after P1/P2.

P4: Minor UI or style issues; addressed after higher priorities.

8. Defect Severity Definition

S1: Critical problems (major crashes, data loss).

S2: Serious issues (major functional defects).

S3: Moderate issues (standard functional or UI bugs).

S4: Minor issues or improvement suggestions.

These fundamentals are essential for entry‑level testers, but applying them effectively in daily work requires practice, continuous summarization, and integration into your personal knowledge system.