Search:
System element types with inconsistent functions
Explanation:
A search will be performed for instances of system element types with inconsistent functions. The order of the functions is not important
Note:
- Types are IQ-objects that are recorded in Catalogs and carry information that is the same for all instances of the type
- Instances of IQ-objects are created when IQ-objects are selected from the Catalogs and reused elsewhere in the IQ-Software
Example:
Abbreviations
- ASIL = Automotive safety integrity level
- BF = Base failure of a base function
- BFn = Base function of a base structure element
- BSE = Base structure element
- Cl Prc = Classification for process characteristic
- Cl Prd = Classification for product characteristic
- Cl Req = Classification for requirement
- CM = Control method
- DA = Detection action
- DC = Diagnostic coverage
- DSCF = Dangerous safety critical failure
- Er Det = Error detection
- Er Resp = Error response
- F = Failure
- FIT = Failure in time
- Fn = Function
- FSM = Functional safety management
- IE = Inspection equipment
- LF = Latent fault
- LFM = Latent fault metric
- OC = Operating condition
- PA = Preventive action
- PE = Process element
- PFH = Probability of failure per Hour
- PMHF = Probabilistic metric for random hardware failures
- PrcC = Process characteristic
- PrdC = Product characteristic
- QM = Quality method
- QR = Quality rule
- Req = Requirement
- RMR = Risk Matrix Ranking
- RP = Reaction plan
- SE = Structure element
- SE ErDet = Structure element for error detections
- SE ErResp = Structure element for error responses
- SFF = Safe failure fraction
- SG = Safety Goal
- SIL = Safety integrity level
- SM = Organisational-SE for “safety mechanisms”
- SPF = Single point fault
- SPFM = Single point fault metric
- TF = Top failure of a top function
- TFn = Top function at root element
- TS = Test sample
- This structure consists of five structure elements, the root element and four further structure elements. With
the Display option “Instance count” active, it is possible to see that the four structure elements consist of
two system elements, namely SE1 and SE2. Each of these elements have two functions (
)
assigned.
- This Quality Rule identifies any instance of a structure element, whereby their anchored functions are not the same. From the structure above, it is possible to see that the two instances of structure element SE2 have different functions.
- SE1 is not a hit as the order of the anchored functions in the list is not important for this Quality Rule.
Search result: 
This example will deliver 2 hits: both instances of SE2.