Compliance of the management system confirmed by certification audit
Valid until 20. März 2028

4. Context of the organization
Compliant
DAG Tief und Leitungsbau demonstrates a clear understanding of customer expectations and the market conditions that influence its operations. The scope and structure of the quality management system comply with the requirements of ISO 9001.
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Chapter 4.1: DAG Tief und Leitungsbau has defined external and internal issues relevant to quality management and takes them into account | Fully available |
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Chapter 4.2: Requirements and expectations of interested parties are determined | Fully available |
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Chapter 4.3: DAG Tief und Leitungsbau has defined the scope of the quality management system | Fully available |
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Chapter 4.4: DAG Tief und Leitungsbau has implemented its quality management system in accordance with the requirements of the standard | Fully available |

5. Leadership
Compliant
Senior management at DAG Tief und Leitungsbau is actively committed to customer orientation and makes key decisions aimed at customer satisfaction, process orientation, and continuous improvement.
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Chapter 5.1: Leadership and commitment requirements are met | Fully available |
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Chapter 5.2: DAG Tief und Leitungsbau has defined and communicated a quality policy | Fully available |
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Chapter 5.3: Roles and responsibilities for quality are defined and practiced | Fully available |

6. Planning
Compliant
Risks and opportunities, quality objectives, and the management of changes are defined and documented. Risk-aware actions help reduce the number of errors. Clear quality objectives enable DAG Tief und Leitungsbau to deliver measurable and transparent performance for its customers.
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Chapter 6.1: DAG Tief und Leitungsbau has defined risks and opportunities | Fully available |
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Chapter 6.2: DAG Tief und Leitungsbau has defined quality objectives and measures to achieve them | Fully available |
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Chapter 6.3: Changes are organized in a structured manner | Fully available |

7. Support
Compliant
DAG Tief und Leitungsbau ensures that order execution is supported by well-trained personnel, appropriate equipment, and clear communication. Suitable tools and resources help avoid delays, employee competence is ensured, and clear communication reduces misunderstandings.
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Chapter 7.1: DAG Tief und Leitungsbau systematically plans personnel and materials | Fully available |
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Chapter 7.2: DAG Tief und Leitungsbau ensures the necessary competencies for quality management | Fully available |
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Chapter 7.3: DAG Tief und Leitungsbau creates awareness of quality among employees | Fully available |
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Chapter 7.4: DAG Tief und Leitungsbau has clear communication structures | Fully available |
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Chapter 7.5: DAG Tief und Leitungsbau has securely documented the key foundations of quality management | Fully available |

8. Operation
Compliant
DAG Tief und Leitungsbau consistently implements the requirements of quality management. Employees receive clear instructions for action. The consistent implementation of these guidelines ensures stable processes, consistent quality, and reliable service delivery for customers.
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Chapter 8.1: DAG Tief und Leitungsbau systematically implements the planning of its quality management | Fully available |
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Chapter 8.2: DAG Tief und Leitungsbau communicates offers and services transparently and clearly | Fully available |
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Chapter 8.3: DAG Tief und Leitungsbau meets the requirements for development activities | Fully available |
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Chapter 8.4: Requirements for supplier management fulfilled | Fully available |
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Chapter 8.5: DAG Tief und Leitungsbau has implemented structures for the smooth execution of customer orders | Fully available |
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Chapter 8.6: Requirements for the release of products and services fulfilled | Fully available |
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Chapter 8.7: Quality defects are identified and rectified in a structured manner | Fully available |

9. Performance measurement
Compliant
\DAG Tief und Leitungsbau regularly measures its performance, monitors it through internal audits, and summarizes the results in a structured management review. This ensures that customers can consistently rely on high quality, on-time delivery, and continuous improvement.
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Chapter 9.1: Results are systematically reviewed and analyzed | Fully available |
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Chapter 9.2: Regular internal checks and audits ensure consistent quality | Fully available |
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Chapter 9.3: DAG Tief und Leitungsbau conducts regular management reviews | Fully available |

10. Improvement
Compliant
DAG Tief und Leitungsbau continuously improves its workflows by incorporating day-to-day feedback, systematically analyzing identified weaknesses, and implementing targeted optimization measures. This enables customers to rely on stable processes, high quality, and continuously improving service.
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Chapter 10.1: DAG Tief und Leitungsbau ensures continual improvement and further development | Fully available |
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Chapter 10.2: DAG Tief und Leitungsbau meets the requirements for the treatment of nonconformities | Fully available |
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Chapter 10.3: DAG Tief und Leitungsbau continuously develops the quality management system | Fully available |