Search:
Characteristics (Control Plan) with incomplete test information
Explanation:
Searches for (Control Plan relevant) product and process characteristics that have test samples which are missing either sample size or sample frequency.
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 contains three structure elements, each of which have both one product characteristic
(
) and one process characteristic (
) assigned to them. The characteristics of each structure
element are linked to each other within a function net and can be recognized with the hot-click icons 
and 
.
- The nets show how the characteristics are linked to each other as follows:
- This Quality Rule will find any characteristics, for which inspection equipment is defined but info is missing for sample size or sample frequency. These can be determined in the Control Plan Editor. The following image shows the control plan for this example.
- The way this control plan example looks is down to two reasons; one: while the product- and process characteristics are linked the way they are, and two: the following setting is active: Document settings | Control Plan | General settings for control plan | Display of process characteristics “is based on characteristic/function net”.
Search result: 
In this example, the following characteristics will be found: product characteristic PrdC2 and PrdC3 as well as process characteristic PrcC2. These are all missing some test information (Size, frequency or both).
PrdC1 and PrcC3 are not hits as they do not have inspection equipment assigned.