Search:
Incorrectly linked functions and characteristics of base elements
Explanation:
A search will be performed for functions and characteristics anchored at base elements, which are linked to
functions or characteristics in the direction of causes.
Note: structure-spanning function net links will not be considered in this search
Note:
- A base element is a structure element, which has no further structure elements in direction of causes (i.e. to the right)
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 four system elements (
), each of which have a different
amount of functions (
), product characteristics (
)
and process characteristics (
) assigned. Of these four system elements BSE1 and SE2 are base
elements, as no further system elements follow in the direction of causes.
- With the display option hot-click icon “Function net” active, it is possible to see which functions and characteristics are linked in a function net.
- If a function or characteristic is linked to further elements in the direction of causes it either has the
icon (
) or (
). Functions or characteristics anchored at base elements with
this icon will be identified with the Quality Rule.
Search result: 
There are two functions, anchored at base element SE2, and one characteristic, anchored at BSE1 that are linked to further elements in the direction of causes. These are IQ objects Fn3, Fn4 and PrcC2.