Search:
Incorrectly linked structure-root functions and characteristics
Explanation:
A search will be performed for functions and characteristics anchored at the structure root, which are linked (in
direction of effects) to functions and characteristics of the same structure.
Structure-spanning function-net links are not considered.
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
- The above structure consists of four system elements (
), each
of which have a different amount of functions (
), product characteristics (
)
and process characteristics (
) assigned.
- If the display option hot-click icon “Function net” is active (e.g.
), it is possible to see
in which direction the functions and characteristics are linked in the function net. These icons allow us to
visually analyze what this Quality Rule will find.
- If a function or characteristic is linked in the direction of effects in the function net, the icon that will
appear will either be (
)
or (
).
Search result: 
Of the six functions and characteristics that exist at the root element, three are linked in the direction of effects. These IQ-objects are TFn2, TFn3 and PrC1.