Process · Automotive
8D (Eight Disciplines problem solving)
A structured quality response process, universal in automotive, that runs from containment through root cause analysis to permanent corrective action, verification and prevention, documented on a standard report the customer tracks.
- Also known as
- 8D report, Global 8D
- Type
- Process
- Domain
- Automotive, Qualification and reliability
- Also relevant to
- Reliability & Quality
Notes
Originating at Ford, an 8D is the expected first deliverable within days of any field escape or line stoppage.
Overview
8D, short for eight disciplines, is a structured team method for solving a quality problem, running from containing the immediate damage to finding the root cause, fixing it permanently and preventing recurrence. It is standard practice in the automotive supply chain, where customers expect suppliers to answer a complaint with an 8D report and follow it to closure. The method came from Ford in the 1980s and exists in several versions, including Ford's Global 8D and a VDA volume.
How it works
The steps are numbered D1 to D8, with a D0 for preparation in some versions. A team is formed (D1) and the problem is described precisely, including where it does and does not occur (D2). Interim containment protects the customer, for example by sorting stock or adding a screen (D3). The team then finds and verifies the root cause and, in Ford's version, the escape point, the earliest control that should have caught the problem (D4). Permanent corrective actions are chosen and verified (D5) and implemented (D6), recurrence is prevented in similar products and processes (D7), and the team is recognised as the case closes (D8).
The report is updated as each step completes, and customers often set deadlines for the first steps. Root cause tools such as five whys and Ishikawa diagrams are used inside it. For chips, the root cause usually depends on failure analysis of returned parts and on manufacturing and test data, which is why returns data is valuable but scarce.
The weak point is D4. A report that blames operator error or a one-off event without proof rarely stops recurrence, which is why guides such as AIAG's CQI-20 and the VDA 8D volume stress clear problem descriptions and sustainable, verified solutions.
Examples
- An automotive customer return investigated at NXP and traced to a missing silicide film, which led to new test patterns aimed at that defect.
- An internal 8D after a wafer sort excursion, where the escape point is found to be a missing inline inspection.
- An assembly subcontractor's 8D on bent leads found at the customer, with corrective action on the trim and form tool.
- A containment action that screens all stock in the supply chain while root cause analysis on returned parts is still under way.
Why it matters
For automotive chip suppliers, how well and how fast 8Ds are handled affects supplier ratings and customer trust. Customer quality engineers usually lead the response, with failure analysis, product, test and process engineers supplying evidence, and corrective actions often reach into test programs, process recipes or suppliers.
Related terms
Part of the Automotive glossary, with every term in the topic and the lifecycles, tools and standards that use them.
Where it appears on the Hub
Used on 22 pages of the Hub. In each group, the pages that mention it most come first.
Lifecycle stages and gates
Skills
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Last reviewed . Written by The Semiconductor Hub editorial team. The full glossary