功能安全项目定义模板Item_Definition-ISO 26262-3-5

3CoName:WP Concept3-5Version:1.7IteDate:.2014State:ISO 26262:2011Overview/Objective:ObjectivesGeneralKey WordsThe first objective is to defineThis clause lists the requirements and recommendations for establishing the* ..and describe the item, itsdefinition of the item with regard to its functionality, interfaces,* ..dependencies on andenvironmental conditions, legal requirements, hazards ction with the environmentand other definition serves to provide sufficient information about the item to thepersons who conduct the subsequent subphases:The second objective is to"Initiation of safety lifecycle" (see Clause 6),support an adequate"Hazard analysis and risk assessment" (see Clause 7) andunderstanding of the item so"Functional safety concept" (see Clause 8).that the activities in subsequentphases can be products:3-5.5Item definition resulting from requirements ist - Item Definition (ISO 26262-3)ements - reference to ISO 26262Interpretation / Key Words / DetailedASILASILASILASILRemark of therequirmentsABCDResults of the ReviewAssessor during theStatusAssessmentThe functional and non-functional requirements of the itemas well as the dependencies between the item and itsenvironment shall be made 1 Requirements can be classified as safety-relatedafter safety goals and their respective ASIL have 2 The required information is a necessary input forthe item definition although it is not safety-related. If notalready available, its generation can be triggered by therequirements of this clause.5.4.1This information includes:a) functional concept, describing the purpose and✓✓✓✓functionality, including the operating modes and states ofthe item;b) operational and environmental constraints;c) legal requirements (especially laws and regulations),national and international standardsd) behaviour achieved by similar functions, items orelements, if any;e) assumptions on behaviour expected from the item; andf) potential consequences of behaviour shortfalls includingknown failure modes and hazards.

NOTE This can include known safety-related incidents onsimilar 13-5 Item Definition

The boundary of the item its interfaces, and theassumptions concerning its interaction with other items andelements, shall be defined considering:a) the elements of the item;NOTE The elements could be also based on other technologyb) the assumptions concerning the effects of the item'sbehaviour on other items or elements, that is theenvironment of the item;c) interactions of the item with other items or elements;5.4.2d) functionality required by other items, elements and the✓✓✓✓environment;e) functionality required from other items, elements and theenvironment;f) the allocation and distribution of functions among theinvolved systems and elements; andg) the operating scenarios which impact the functionality ofthe 23-5 Item Definition