Design Verification Plan and Report (DVP&R)
DVP&R defines how design requirements will be verified and records the results. A useful plan links each requirement and risk to an appropriate test, analysis, inspection or demonstration with clear acceptance criteria.
ENGINEERING TOPIC 01
Verification planning
Start with requirements and known risks.
Identify the requirement and source.
Define the verification method.
Select test conditions and sample quantity.
Define acceptance criteria before testing.
Identify equipment, laboratory and responsible owner.
ENGINEERING TOPIC 02
Verification methods
Choose a method that produces relevant evidence.
Dimensional inspection
Material and component testing
Environmental and durability testing
Functional and performance testing
Simulation or engineering analysis where accepted
Vehicle-level or system-level testing
ENGINEERING TOPIC 03
DVP&R report
Record the result and the decision.
Test ID and requirement reference
Test setup, conditions and sample details
Measured result and acceptance status
Deviation, issue and corrective action
Retest evidence and final closure
ENGINEERING TOPIC 04
Example validation considerations
A plastic interior trim component may require dimensional, retention, thermal ageing, scratch/abrasion and squeak/rattle checks depending on its requirements.
Map each test to a defined requirement.
Avoid tests with no clear pass/fail criterion.
Investigate failures before declaring closure.
Retain traceable reports and approvals.
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VERIFICATION & VALIDATION
Translate requirements into a traceable DVP&R
Verification asks whether the defined product output meets its specified requirements. Validation asks whether the product, in its intended context of use, fulfils the customer and user needs. The exact terminology and ownership can vary by organisation, but both must be planned and evidenced.
Build a test plan from requirements
| DVP&R field | What must be defined | Quality check |
|---|---|---|
| Requirement / characteristic | Unique requirement ID, source, revision and measurable statement. | Is it traceable to an approved requirement or specification? |
| Verification method | Inspection, analysis, test, demonstration or other approved method. | Does the method measure the characteristic being claimed? |
| Conditions and sample | Test setup, sample quantity, conditioning, equipment and operating range. | Are boundary conditions and sample rationale documented? |
| Acceptance criteria | Numeric limit or clearly defined pass/fail condition from the authorised source. | Is the criterion approved and unambiguous? |
| Responsibility and timing | Owner, laboratory/supplier, build phase and planned completion. | Are dependencies and approvals visible? |
| Result and evidence | Actual result, report reference, deviation, disposition and closure status. | Can another reviewer reproduce the conclusion from the evidence? |
Illustrative example: headlamp enclosure sealing
Start with the approved sealing and environmental requirements for the lamp assembly. Identify the relevant joints, vents, connectors and interfaces. Select the test method and conditioning sequence required by the programme specification. Define sample configuration, mounting condition, acceptance criteria and evidence to be recorded. A generic ingress-protection rating must not be assumed to cover every vehicle-level water, pressure-wash, thermal-cycle or condensation condition.
Verification versus validation: practical distinction
Verification: confirms a defined characteristic against a specified requirement—for example, a dimension, retention force or test result.
Validation: confirms the integrated product works for its intended use and user context—for example, a closure system operates acceptably across the vehicle usage conditions.
Correlation: where analysis or simulation is used, establish how its assumptions and results are correlated to physical evidence where required.
Expected deliverable: a requirement-linked DVP&R matrix with methods, conditions, criteria, owners, results, report references, deviations and closure approvals. Never invent test limits; use the authorised drawing, specification, regulation or customer requirement.
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