Expert support for customer and supplier complaints: 8D reports, root cause analysis and supplier quality.

An 8D report is a structured problem-solving method consisting of eight disciplines, originally developed in the automotive industry and now required by virtually every OEM and tier 1 supplier. A well-built 8D report guides the team systematically from problem description and containment through root cause analysis to permanent corrective and preventive actions. As an experienced 8D report consultant, we help companies produce reports that pass customer quality reviews on the first attempt.

We work systematically: first we define the problem and its consequences precisely, then we separate the symptom from the cause and search for the root cause across technical, organizational, and systemic levels. We use 5 Why Analysis, the Ishikawa Diagram, good vs. bad part comparison (is / is not), and we verify causal relationships through tests or failure replication. As root cause analysis experts, we help teams find the true cause instead of symptoms, preventing the problem from recurring.

Supplier Complaint Management is the structured process of handling supplier nonconformities: precise defect reporting to the supplier, short deadlines for containment, a requirement for an 8D report matched to severity, evaluation of the report instead of automatic acceptance, verification of action effectiveness on subsequent deliveries, and structured escalation when the supplier fails to respond. As a supplier quality consultant, I help set up this process end to end and coach suppliers towards honest root cause analysis.

The Automotive Core Tools are the four key quality methodologies of the automotive industry: FMEA (analysis of potential failure modes and their effects), SPC (statistical process control), MSA (measurement system analysis), and APQP/PPAP (quality planning and production part approval). Compliance with IATF 16949 assumes their consistent application. As the holder of an Automotive Core Tools certificate from the official VDA certification body, I apply this methodology knowledge within 8D problem solving and root cause analysis; the Core Tools themselves are not offered as a separate consulting service.

Supplier Quality Management covers supplier selection and approval, defining quality requirements, monitoring key indicators (delivery discipline, complaints, PPM), and systematically resolving supplier nonconformities. The goal is a stable supply chain with minimal external defects. As a supplier quality consultant, we set up processes from initial supplier approval through continuous performance improvement.

A correction eliminates the symptom of the nonconformity itself (for example reworking defective parts or sorting them out), while a corrective action eliminates the cause so that the problem cannot recur. Preventive actions additionally address potential nonconformities that have not yet occurred. Together they form the CAPA system (Corrective and Preventive Actions). In a well-written 8D report, both levels must be clearly separated and verified to demonstrate effectiveness.

The 5 Why Analysis is ideal for simple, clearly defined causal chains where repeated "why" questions quickly lead to the systemic cause. The Ishikawa Diagram is better suited to complex problems with multiple possible cause sources (material, method, machine, man, measurement, environment), because it structures the brainstorming of the entire team. An experienced consultant often combines both: the fishbone for complete coverage of potential causes, and 5 Why for proving the causal chain along the selected branches.

Writing the report itself is usually the fastest part; honest root cause analysis and verification of corrective actions take considerably more time. In straightforward cases, the first three disciplines can be closed within one to two days, while complex technical problems can take several weeks for the full 8D cycle. Timing matters: customers typically expect disciplines D1 to D3 (team, problem description, containment) within 24 to 48 hours of a complaint.

APQP (Advanced Product Quality Planning) is a framework for planning the quality of a new product from concept through the start of serial production, while PPAP (Production Part Approval Process) is its final deliverable: a package of documents with which the supplier proves that the process is capable of consistently producing to customer requirements. PPAP therefore requires completed APQP activities, including FMEA, the control plan, and MSA studies. This is general industry knowledge that I connect to complaint management and root cause analysis; standalone APQP and PPAP consulting is not offered.

Yes. Although our background is automotive, methods such as 8D, FMEA, SPC, and CAPA are universally applicable in machinery, electronics, medical devices, and the chemical industry. In other sectors, automotive standards are often seen as a quality benchmark and a competitive advantage. We adapt terminology and the depth of the methods to your industry and to your customers' requirements.

We work in Czech, English, and German, since most documentation in the European automotive supply chain is written in exactly these languages. 8D reports, root cause analysis and corrective action documentation can be delivered in any of them, including direct communication with your customers abroad. We also handle situations where the team works in Czech but the deliverable must be written in English or German.