Go/no-go: Difference between revisions

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{{Short description|A pass/fail test (or check) principle using two boundary conditions or a binary classification}}

{{for|the test's use during a rocket launch|Launch status check}}

A '''go/no go''' test is a verification step that uses two boundary conditions or a [[binary classification]]. The test is passed only when the ''go'' condition is met and also the ''no go'' condition fails.

A '''go/no -go''' test is a two-step verification stepprocess that uses two boundary conditions, or a [[binary classification]]. The test is passed only when the ''go'' condition ishas been met and also the ''no -go'' condition failshas failed.

The test gives no information as to the degree of conformance to, or deviation from the boundary conditions. These tests can be used for [[statistical process control]] purposes. There are specific SPC tools that use parameter based measurements (e.g., P-charts) for determining the stability of a process.

The test gives no information as to the degree of conformance to, or deviation from the boundary conditions. These tests can be used for [[statistical process control]] purposes. There are specific SPC tools that use parameter based measurements (e.g., P-charts) for determining the stability of a process.

It has uses in engineering, psychology, military, and manufacturing. For example, a rocket [[launch status check]] involves a go/no-go test.

== Uses ==

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In [[engineering]] the test is traditionally used only to check noncritical parameters where the manufacturing process is believed to be stable and well controlled, and the [[tolerance (engineering)|tolerance]]s are wide compared to the [[frequency distribution|distribution]] of the parameter.

For example, the preceding [[launch status check]]s before a [[Space Shuttle]] liftoff had the [[flight controller]] perform a go/no -go check on each of the vehicle's critical systems.

=== Psychology ===

In [[psychology]], go/no -go teststest, aredeveloped by [[neuropsychologist]] [[Alexander Luria]] in 1940-50s is used to measure a participant's capacity for switching between several types of behavioural response ("plasticity") and control of adequacy of response (impulse control and sustained attention). Since the work of [[attentionAlexander Luria]] andin [[neuropsychology]], such response controlis linked to the cortical [[frontal lobes]].

For example, a go/no -go test that requires a participant to perform an action given certain stimuli (e.g., press a button) and also inhibit that action under a different set of stimuli (e.g., not press that same button).

=== Military ===

In the [[United States Army]], drills and proficiency evaluation rubrics are based on a go/no -go (pass/fail) system. Evaluations involving numerical scores (such as the [[physical fitness test]]) convert raw scores to go/no -go based on cutoffs defined by the particular performance standard for that area. Within a given skills unit, the rubric often specifies go/no -go scoring for each individual item or concept a soldier is expected to be trained and evaluated on. Usually, a soldier must score "go" (i.e. perform satisfactorily) on all sections of an evaluation in order to advance to the next phase of training, pass the course, or attain the particular qualification.

=== Manufacturing <span class="anchor" id="Go/no-go gauges"></span> <span class="anchor" id="Go/no go gauges"></span> ===

== Go/no go gauges ==

{{main|Go/no -go gauge}}

[[File:Go & No-Go gauge.jpg|thumb|Go and no -go gauges]]

Go/no -go gauges are encountered in all types of manufacturing.<ref>{{cite book | url=https://archive.org/details/in.ernet.dli.2015.212228 | page=[https://archive.org/details/in.ernet.dli.2015.212228/page/n101 78] | title=Machine Tool Operation| publisher=McGraw-Hill book Company, Incorporated | last1=Burghardt| first1=Henry D.| year=1919}}</ref>

They may measure a physical dimension, e.g. (50 ±&nbsp;0.01mm01&nbsp;mm), or a value such as the value of a [[Resistor#Preferred values|resistor]] (100Ω100&nbsp;Ω ([[Ohm (unit)|ohms]]) ±&nbsp;1%).

A typical example is a [[plug gauge]].<ref>{{cite book|last=Hoffman|first=Edward G.|title=Fundamentals of Tool Design|year=1985|publisher=Society of Manufacturing Engineers (SME) Publications/Marketing Division|___location=Dearborn|isbn=0-87263-134-6|pages=499–502}}</ref>

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<references />

== External links ==

* [https://tstbl.co/891-623 An online version of go/no-go test]

{{DEFAULTSORT:Go No Go}}

[[Category:Quality control]]