HKSM

Inspection is a quality technique that examines, measures, or tests deliverables, services, or processes to verify they meet specified requirements and acceptance criteria. It provides objective evidence for accept, reject, or rework decisions.

Key Points

• Inspection verifies conformance of work products or processes against defined requirements and acceptance criteria.
• Used in Control Quality to detect defects and in Validate Scope to support formal acceptance decisions.
• May include measuring, testing, walkthroughs, peer reviews, visual checks, and checklists, using full or sample-based coverage.
• Outputs include inspection records, defect/nonconformance logs, and accept or rework decisions.
• Requires clear criteria, calibrated tools, trained inspectors, and traceable documentation.
• Inspection detects defects but does not prevent them; balance with preventive quality methods to reduce cost of quality.

Quality Objective

Confirm that deliverables and processes meet agreed requirements so the customer receives fit-for-use outcomes, defects are captured before release, and compliance obligations are met.

Method Steps

• Define what to inspect and the acceptance criteria, tolerances, and sampling approach in the quality plan.
• Prepare inspection checklist, measurement methods, and needed tools; ensure calibration and access to specifications.
• Execute the inspection by observing, measuring, or testing the item(s) per the plan and sampling scheme.
• Record results objectively, classify nonconformities (e.g., critical, major, minor), and capture evidence.
• Decide accept, conditionally accept, or reject; initiate rework or repair for nonconforming items.
• Analyze root cause if patterns appear; raise change requests when standards or processes must change.
• Reinspect after rework to verify effectiveness, and update lessons learned and quality metrics.

Inputs Needed

• Requirements, specifications, and acceptance criteria.
• Designs, drawings, user stories, or product descriptions.
• Quality management plan, checklists, and sampling plan.
• Measurement and test equipment with calibration records.
• Previous inspection results, defect logs, and control charts.
• Risk register and regulatory/contractual requirements.

Outputs Produced

• Inspection reports and objective evidence records.
• Defect or nonconformance log entries with severity.
• Acceptance, conditional acceptance, or rejection decisions.
• Rework or repair requests and verified reinspection results.
• Change requests for process/product updates when needed.
• Updated quality metrics and lessons learned.

Acceptance/Control Rules

• Items must meet stated acceptance criteria and tolerances to pass.
• Use defined sampling plans with acceptance quality limits (AQL) where full inspection is not feasible.
• Classify nonconformities and apply corresponding disposition: accept, rework, repair, or scrap.
• Measure with calibrated tools and use consistent methods to ensure repeatable results.
• Inspectors should be competent and independent of the work when practical.
• Record traceable evidence (who, what, when, how) and maintain configuration control of inspected items.
• Escalate critical defects immediately and consider stop-work if safety or compliance is at risk.

Example

A team produces 500 units of a component. The plan specifies sampling 50 units with an AQL for major defects of 1.0%. The inspector measures dimensions against the spec, records two major defects, rejects the lot, issues a rework request, and schedules reinspections after corrective actions.

Pitfalls

• Relying on inspection alone instead of improving processes to prevent defects.
• Vague or changing acceptance criteria leading to inconsistent decisions.
• Uncalibrated tools or untrained inspectors causing unreliable results.
• Weak sampling plans that miss systematic issues or overburden the team.
• Not documenting results, making trends and root causes hard to analyze.
• Inspecting too late, when fixes are costly and schedule impact is high.

PMP Example Question

During Control Quality, a batch of deliverables fails inspection due to a critical nonconformity. What should the project manager do first?

1. Approve the batch with conditions to avoid schedule delays.
2. Submit a change request to expand scope and proceed with delivery.
3. Record the nonconformance, reject the batch, and initiate rework per the quality plan.
4. Escalate to the sponsor to decide whether to accept the defect.

Correct Answer: C — Record the nonconformance, reject the batch, and initiate rework per the quality plan.

Explanation: Failed inspection requires documenting the issue and dispositioning items per the quality plan (e.g., rework) before acceptance. Escalation or scope changes may follow root cause analysis, not as the first action.