What are DV/PV Tests? Understanding Verification Tests for Automotive Components Performed Before Full-Scale Production

DV/PV tests are critical steps in the development of automotive parts, conducted to confirm that the design is correct and the manufacturing process is stable. By implementing them before full-scale mass production begins, quality risks and subsequent problems can be significantly reduced.
In the automotive industry, where quality requirements are extremely high and strict standards are demanded, all processes of part development and manufacturing must be systematically managed. Among these, one of the critical steps is the tests to confirm whether the "design" and "manufacturing process" can meet specifications and expectations, namely, verification tests called DV (Design Validation) and PV (Process Validation).
1. Definition of DV and PV Tests
DV (Design Validation) is a test to confirm whether the product design meets predetermined engineering requirements (such as structure, durability, and operation under various environmental conditions). This is conducted using prototypes or small-lot production items, and the stability of the actual manufacturing process is not yet considered.
PV (Process Validation) is a test to confirm whether the actual mass production process can consistently reproduce the designed quality. It is performed with parts manufactured under mass production conditions using actual production equipment, materials, and personnel, and evaluates whether quality can be ensured during mass production.
2. Test Objectives
- Confirm that the product design functions according to specifications even under real-world usage conditions
- Verify the durability and reliability of parts under conditions anticipated during use
- Evaluate the stability of the manufacturing process and suppress production variations
- Minimize the risk of quality problems after the start of mass production
- Provide assurance to both the manufacturer and the customer (OEM)
3. Examples of Tests
In DV tests, tests simulating harsh usage environments are conducted. For example:
- Thermal cycling to reproduce rapid temperature changes
- Vibration testing to evaluate durability against vibration
- UV resistance evaluation (UV test)
- Verification of corrosion resistance through salt spray testing
PV tests focus on the capabilities of the production line and perform verifications such as the following:
- Whether accurate assembly is possible
- Dimensional stability
- Presence of leaks and sealing performance
- Durability during long-term use
All these tests are conducted using parts made through the actual production process.
4. DV/PV Test Procedure
- Define the design specifications and characteristic requirements of the part
- Create a Test Plan based on industry standards such as ISO, SAE, and OEM specifications
- Prepare prototypes for DV and parts from the actual production line for PV
- Conduct tests at certified testing laboratories
- Collect and analyze test results, and create a summarized report
- If problems are found, improve the product based on the results
5. Relationship with the APQP Process
DV and PV tests form the core of Steps 3 and 4 in APQP (Advanced Product Quality Planning), a quality planning methodology widely adopted in the automotive industry:
- Phase 3: Design and Development Verification → Related to DV tests
- Phase 4: Product and Process Validation → Includes PV tests