Service Manuals, User Guides, Schematic Diagrams or docs for : Agilent A Guard-Band Strategy for Managing False-Accept Risk - White Paper 5991-1267EN c20140530 [10]

<< Back | Home

Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.



Image preview - the first page of the document



>> Download A Guard-Band Strategy for Managing False-Accept Risk - White Paper 5991-1267EN c20140530 [10] documenatation <<

Text preview - extract from the document

Keysight Technologies
A Guard-Band Strategy for
Managing False-Accept Risk




                                                                                                     White Paper




   Abstract
   When performing a calibration, the risk of incorrectly declaring a device as in-tolerance (false-
   accept risk) is dependent upon several factors. Those factors include the specified tolerance
   limit, guard-band, the calibration process uncertainty and the a priori probability that the device
   is intolerance. A good estimate of the a priori probability may be difficult to obtain. Historical or
   device population information for estimating the a priori probability may not be readily available
   and may not represent the specific device under test.

   A common strategy for managing measurement decision risk is to choose a guard-band that
   results in the desired false-accept risk given the tolerance limit, the calibration process uncer-
   tainty and the a priori probability. This paper presents a guard-band strategy for managing false-
   accept risk with only limited knowledge of the a priori probability that a device is intolerance.
Introduction
   When determining if measurement quantities are within specified tolerances, ANSI/NCSLI Z540.3-2006 specifies that
   the maximum level of false-accept risk be no more than 2%. False-accept risk is the probability that measuring an out-of-
   tolerance device will indicate an intolerance condition due to measurement error. False-reject risk is the probability that
   measuring an in-tolerance device will indicate an out-of-tolerance condition due to measurement error. False-accept and
   false-reject occurrences have financial consequences, and therefore, minimizing both is often a worthwhile objective.

   One strategy for managing false-accept risk is to apply a guard-band such that the acceptance limits are more stringent
   that the tolerance limits. A common practice (see [3]) is to set the guard-band to a value equal to the 95% expanded
   uncertainty of the calibration process. This level of guard-band guarantees the Z540.3 false-accept risk requirement and is
   attractive in that it only requires information that many calibration organizations routinely manage (that is, the tolerance
   limits and the 95% expanded uncertainty, which is set as the guard-band). However, when using a guard-band to reduce
   false-accept risk, a corresponding increase results in the false-reject risk. With the guard-band set to the 95% expanded
   uncertainty, the false-reject risk can be disproportionately high (see Figure 3).

   An alternative to applying a guard-band equal to the 95% expanded uncertainty is to determine the false-accept risk and
   set an appropriate guard-band, if necessary, that adjusts the false-accept risk to the desired level. To determine the level
   of false-accept (or false-reject risk) for a calibration measurement, the following information is necessary:
     

◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo