Terminology: see Belgian standard NBN-is 8402 - Vocabulary Specific terms or terms used in a non-common sense used in the n in standard X 50-001, "Terminology", must be defined by way of example. Rule: Mandatory system specific to the company including details of application, procedures and instructions. Logis ics operation: an operation carried out in support of the production line. Interface: Connection between different systems, equipment, components, services, etc. Status: Characterization of a document allowing the validity of the information to be defined, e.g. : a document may have one of the following statuses: preliminary, approved for execution, final, etc., this characterization must appear on the cover page of the plan title block. Qualification profile: Set of criteria relating to experience and training, determination and choice are made based on a specific job position. Instruction: Provis on formulating an action to be taken. 2 Abbreviations All abbreviations used in the manual are defined here, such as e.g. ex. QA: Quality assurance GPE: Good for execution CND: Non-destructive testing DG: General management GQ: Quality management.