Search:
Characteristic- and requirement types with inconsistent test samples
Explanation:
A search will be performed for characteristic- and requirement types (product characteristics, process characteristics, and requirements) with more than one instance, whereby the instances have inconsistent test samples.
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
- The above structure consists of three structure elements, each of which have two requirements (
), two product characteristics (
) and two process characteristics
(
) assigned.
- This Quality Rule identifies any characteristic and requirement, which firstly has more than one instance and
of these instances, there are different test samples. With the correct display options active, namely “Instance
count” and “Test samples”, it is possible to see how many instances ({3}) to each element there are as well as
which test samples (
)
have been assigned.
- The third instance of PrdC1 and all instances of PrcC2 have no test samples, as none have been assigned to these elements.
Search result: 
This example delivers 9 hits: the instances of Anf2, PrdC1 and PrcC1
Because all the instances of PrcC2 do not have any test samples assigned, they are not considered for this Quality Rule search.
The order in which the test samples are assigned in the list is not important. This explains why PrdC2 is not a part of the results.