Search:
Unlinked functions and characteristics with failures
Explanation:
A search will be performed for functions and characteristics, which have failures, but are not linked in a function net
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 three structure elements, each of which have two functions (
), one product characteristic (
) and one process characteristic (
) assigned. - With the display option hot-click icon “Function net” active, it is possible to see in the structure list
which functions and characteristics are not linked in a function net (
). Here there are six
objects not linked.
- Of the six objects, this Quality Rule then identifies those objects that have failures anchored to them. Here there are three.
Search result: 
This example delivers 3 hits: the functions Fn1 and Fn4 as well as the characteristic PrdC2. It is not relevant whether the failures are linked in failure nets.