Difference between revisions of "Quality score formula"

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[[File:QSF.png|border|1000px]]
 
[[File:QSF.png|border|1000px]]
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;1. Account score limit
 
;1. Account score limit
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:A sum of products of #2 and #3 for all the mistakes.
 
:A sum of products of #2 and #3 for all the mistakes.
 
;5. Project evaluation word count
 
;5. Project evaluation word count
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:''Automatic word count'': The value from the "Total source words" field in the "Evaluation details" section (not the Total source words of a file). Please see the [[Evaluation_report#Automatic_vs._manual_word_count|Automatic vs. manual word count]] page.
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:''Manual word count'': The value from the "Evaluated source words" field (specified when starting the evaluation with a manual word count).
 
;6. 1000
 
;6. 1000
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:
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:In the end, the result is always converted to 1000, a most optimal value.
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The mistake severity scores, mistake type weights, and reports are based on this 1000-word amount. For example, a critical mistake with score of 20 with weight coefficient of 1 reduces the quality score by 20 per 1000 words (by 10 per 2000 words, accordingly, and so on).
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=='''TQAuditor v3.0'''==
 
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===How Quality Score is calculated===
 
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In TQAuditor v3.0 the Quality Score formula is similar to MQM score formula http://www.qt21.eu/mqm-definition/definition-2015-12-30.html#scoring-algorithm
 
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The quality score reflects the number of mistakes made per 1000 words of the translated text.
 
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'''The formula is:'''
 
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ROUND(GREATEST(account.score_limit - SUM(mistake_severity.score * mistake_type_spec.weight) / project.evaluation_total_word_count * 1000, 0), 2)
 
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'''The formula interpretation:'''
 
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ROUND(var1, 2) — returns rounded to two decimal places value
 
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ROUND(GREATEST(var2, 0), 2) — returns "0" in case of a negative value (example: if "-5" then "0").
 
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'''Variables interpretation:'''
 
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var1 = GREATEST(main2, 0)
 
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var2 = account.score_limit - (SUM(mistake_severity.score * mistake_type_spec.weight) / project.evaluation_total_word_count) * 1000
 
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*'''mistake_severity.score'''—the mistake severity score.
 
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*'''mistake_type_spec.weight'''—the weight coefficient of the mistake type per project specialization.
 
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*'''project.evaluation_total_word_count'''—total source words after the '''<U>[[Evaluation report#General information|Start evaluation]]</U>''' filter is applied (whether with '''<U>[[Evaluation report#Start evaluation (automatic word count)|automatic]]</U>''' or '''<U>[[Evaluation report#Start evaluation (manual word count)|manually entered]]</U>''' word count).
 
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'''<span style="color:red"> Note:</span>''' '''account.score_limit''' is equal to 100 by default, but you may define the highest score limit you need in the '''<U>[[Evaluation settings]]</U>'''.
 
  
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=='''TQAuditor v2.14'''==
 
  
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=== How Quality Score is calculated ===
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For more information, please check the [[Quality score formula:Details and versions|Quality score formula:Details and versions]] page.
  
 +
=='''Quality score calculation examples'''==
  
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Quality score reflects the number of mistakes made per 1000 words of translated text.
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In the examples below, the following quality standard is used:
  
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The formula is:  
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[[File:QS.png|border|300px]]
  
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Quality score = Σ(mistake_severity.score * mistake_type_spec.weight) * project.evaluation_corrected_word_count / project.evaluation_sample_word_count / project.evaluation_total_word_count * 1000,
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[[File:QS1.png|border|1000px]]
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where:
 
  
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*'''Quality score''' - the number of "base" mistakes per 1000 words ("base" mistake - the mistake that has the severity score of 1 and the weight coefficient of 1).
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===Automatic word count===
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*'''Σ''' - the sum of products of the mistake severity score and the weight coefficient of the mistake type per specialization.
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‎<br />
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*'''mistake_severity.score''' - the mistake severity score.
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;File details&#58;
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*'''mistake_type_spec.weight''' - the weight coefficient of the mistake type per project specialization.
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:Total source words: 3126
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*'''project.evaluation_corrected_word_count''' - source words in corrected units in the evaluation sample.
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:Fully reviewed: yes
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*'''project.evaluation_sample_word_count''' - total source words in the evaluation sample.
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:Number of units (segments): 392
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*'''project.evaluation_total_word_count''' - total source words after evaluation start filter is applied.
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:Project specialization - marketing
  
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=== How the number of translated words is selected ===
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;Evaluation settings&#58;
 +
[[File:EAS.png|border|300px]]
  
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To make it simpler, let’s make an example:
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;Evaluation details&#58;
 +
:Total source words: 1749
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:Source words in corrected units: 1002
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 +
'''Mistakes:'''
  
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Before starting the evaluation, the reviewer selects the number of words to evaluate:
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# <span style="color:red">'''Major'''</span> ('''<span style="color:blue">3</span>''' points each):
 +
## Terminology: '''1''' (weight coefficient '''<span style="color:DarkTurquoise">1</span>''')
 +
## Grammar: '''1''' (weight coefficient '''<span style="color:DarkTurquoise">1.2</span>''')
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# <span style="color:orange"> '''Minor'''</span> ('''<span style="color:blue">1</span>''' point each):
 +
## Grammar: '''3''' (weight coefficient '''<span style="color:DarkTurquoise">1.2</span>''')
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## Functional: '''2''' (weight coefficient '''<span style="color:DarkTurquoise">1</span>''')
 +
# <span style="color:green"> '''Repetitive'''</span> ('''<span style="color:blue">0.01</span>''' point each):
 +
## Functional: '''6''' (weight coefficient '''<span style="color:DarkTurquoise">1</span>''')
 +
## Layout: '''8''' (weight coefficient '''<span style="color:DarkTurquoise">1</span>''')
 +
# <span style="color:#6C3483"> '''Non-scoring'''</span> ('''<span style="color:blue">0</span>''' points each):
 +
## Style: '''5''' (weight coefficient '''<span style="color:DarkTurquoise">1.2</span>''')
 +
## Terminology: '''3''' (weight coefficient '''<span style="color:DarkTurquoise">1</span>''')
  
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[[File:Start evaluation filter.jpg|border|350px]]
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:'''Total mistakes''': '''29'''
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:'''SUM''': '''1'''*'''<span style="color:blue">3</span>'''*'''<span style="color:DarkTurquoise">1</span>'''+'''1'''*'''<span style="color:blue">3</span>'''*'''<span style="color:DarkTurquoise">1.2</span>'''+'''3'''*'''<span style="color:blue">1</span>'''*'''<span style="color:DarkTurquoise">1.2</span>'''+'''2'''*'''<span style="color:blue">1</span>'''*'''<span style="color:DarkTurquoise">1</span>'''+'''6'''*'''<span style="color:blue">0.01</span>'''*'''<span style="color:DarkTurquoise">1</span>'''+'''8'''*'''<span style="color:blue">0.01</span>'''*'''<span style="color:DarkTurquoise">1</span>'''+'''5'''*'''<span style="color:blue">0</span>'''*'''<span style="color:DarkTurquoise">1.2</span>'''+'''3'''*'''<span style="color:blue">0</span>'''*'''<span style="color:DarkTurquoise">1</span>'''=3+3.6+3.6+2+0.06+0.08+0+0='''12.34'''
  
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Now imagine that the whole translated text (marketing specialization) contains 3126 words, and the editor corrects the segments containing 2323 source words.
 
  
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You select 1000 words sample which is randomly taken by the system out of 2323 source words in corrected units and add 5 mistakes of different types and severities. Two of them are minor punctuation mistakes
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;Quality score calculation&#58;
  
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(the severity score of 1 and the weight coefficient of 0.9 for every mistake), and three of them are major grammar mistakes (the severity score of 5 and the weight coefficient of 1.2 for every mistake):
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Using the [[Quality_score_formula#Quality_score_formula_visualisation_and_interpretation|formula]]:
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100-(12.34/1749*1000)=92.94
  
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[[File:QS types and severities 1.jpg|border|600px]]
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[[File:QSA.png|border|300px]]
  
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<span style="color:red">'''Note:''' By default, the system has pre-defined quality standards, but you can define your own corporate '''<U>[[System|quality standards]]</U>'''.</span>
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----
  
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As a result, we get:
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===Manual word count===
  
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'''Quality score''' = Σ(1*0.9+1*0.9+5*1,2+5*1,2+5*1,2)*2323/3126/1001*1000=14,699
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‎<br />
 +
;File details&#58;
 +
:Total source words: 3126
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:Fully reviewed: no
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:Number of words in a reviewed part of the file: around 1500
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:Number of units (segments): 392
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:Project specialization - marketing
  
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You’ll be able to see these numbers on the evaluation page:
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;Evaluation settings&#58;
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:‎Evaluated source words: 1500<br />
  
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[[File:QSF result 1.jpg|border|200px]]
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;Evaluation details&#58;
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:Corrected units: 227
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:Total source words: 1500
 +
 +
'''Mistakes:'''
  
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Where:
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# <span style="color:red">'''Major'''</span> ('''<span style="color:blue">3</span>''' points each):
 +
## Terminology: '''1''' (weight coefficient '''<span style="color:DarkTurquoise">1</span>''')
 +
## Grammar: '''1''' (weight coefficient '''<span style="color:DarkTurquoise">1.2</span>''')
 +
# <span style="color:orange"> '''Minor'''</span> ('''<span style="color:blue">1</span>''' point each):
 +
## Grammar: '''3''' (weight coefficient '''<span style="color:DarkTurquoise">1.2</span>''')
 +
## Functional: '''2''' (weight coefficient '''<span style="color:DarkTurquoise">1</span>''')
 +
# <span style="color:green"> '''Repetitive'''</span> ('''<span style="color:blue">0.01</span>''' point each):
 +
## Functional: '''6''' (weight coefficient '''<span style="color:DarkTurquoise">1</span>''')
 +
## Layout: '''8''' (weight coefficient '''<span style="color:DarkTurquoise">1</span>''')
 +
# <span style="color:#6C3483"> '''Non-scoring'''</span> ('''<span style="color:blue">0</span>''' points each):
 +
## Style: '''5''' (weight coefficient '''<span style="color:DarkTurquoise">1.2</span>''')
 +
## Terminology: '''3''' (weight coefficient '''<span style="color:DarkTurquoise">1</span>''')
  
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*'''Quality score''' = 14,7.
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:'''Total mistakes''': '''29'''
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*'''project.evaluation_corrected_word_count''' = 2323.
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:'''SUM''': '''1'''*'''<span style="color:blue">3</span>'''*'''<span style="color:DarkTurquoise">1</span>'''+'''1'''*'''<span style="color:blue">3</span>'''*'''<span style="color:DarkTurquoise">1.2</span>'''+'''3'''*'''<span style="color:blue">1</span>'''*'''<span style="color:DarkTurquoise">1.2</span>'''+'''2'''*'''<span style="color:blue">1</span>'''*'''<span style="color:DarkTurquoise">1</span>'''+'''6'''*'''<span style="color:blue">0.01</span>'''*'''<span style="color:DarkTurquoise">1</span>'''+'''8'''*'''<span style="color:blue">0.01</span>'''*'''<span style="color:DarkTurquoise">1</span>'''+'''5'''*'''<span style="color:blue">0</span>'''*'''<span style="color:DarkTurquoise">1.2</span>'''+'''3'''*'''<span style="color:blue">0</span>'''*'''<span style="color:DarkTurquoise">1</span>'''=3+3.6+3.6+2+0.06+0.08+0+0='''12.34'''
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*'''project.evaluation_sample_word_count''' = 3126.
 
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*'''project.evaluation_total_word_count''' = 1001.
 
  
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=== Why is it made that way? ===
 
  
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We came to this through several stages of evolution.  
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;Quality score calculation&#58;
 +
Using the [[Quality_score_formula#Quality_score_formula_visualisation_and_interpretation|formula]]:
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100-(12.34/1500*1000)=91.77
  
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First, the system was selecting just the beginning of the text, and we found out that the translators started to translate first 1000 words better than the rest of the text. So we decided to select the random part of the text. But then the system sometimes selected the pieces containing no corrections while skipping heavily corrected parts. So we changed the logic, and now the system returns the required number of corrections to the evaluator, but remembers how much text it took to find these corrections.
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[[File:QSM.png|border|300px]]

Latest revision as of 15:20, 28 January 2022

Quality score formula visualisation and interpretation

QSF.png

1. Account score limit
The highest possible score (100 by default). Can be set on this page: [Evaluation settings]
2. Mistake severity score
Score of mistake by its severity (for example, 1 point for minor and 5 points for major mistakes). Can be set on this page: [Mistake severities list]
3. Mistake type weight
Weight of a specific mistake type by specialization. Can be adjusted on this page [Mistake types list]
4. SUM
A sum of products of #2 and #3 for all the mistakes.
5. Project evaluation word count
Automatic word count: The value from the "Total source words" field in the "Evaluation details" section (not the Total source words of a file). Please see the Automatic vs. manual word count page.
Manual word count: The value from the "Evaluated source words" field (specified when starting the evaluation with a manual word count).
6. 1000
In the end, the result is always converted to 1000, a most optimal value.

The mistake severity scores, mistake type weights, and reports are based on this 1000-word amount. For example, a critical mistake with score of 20 with weight coefficient of 1 reduces the quality score by 20 per 1000 words (by 10 per 2000 words, accordingly, and so on).


For more information, please check the Quality score formula:Details and versions page.

Quality score calculation examples

In the examples below, the following quality standard is used:

QS.png

QS1.png

Automatic word count

‎

File details:
Total source words: 3126
Fully reviewed: yes
Number of units (segments): 392
Project specialization - marketing
Evaluation settings:

EAS.png

Evaluation details:
Total source words: 1749
Source words in corrected units: 1002

Mistakes:

  1. Major (3 points each):
    1. Terminology: 1 (weight coefficient 1)
    2. Grammar: 1 (weight coefficient 1.2)
  2. Minor (1 point each):
    1. Grammar: 3 (weight coefficient 1.2)
    2. Functional: 2 (weight coefficient 1)
  3. Repetitive (0.01 point each):
    1. Functional: 6 (weight coefficient 1)
    2. Layout: 8 (weight coefficient 1)
  4. Non-scoring (0 points each):
    1. Style: 5 (weight coefficient 1.2)
    2. Terminology: 3 (weight coefficient 1)
Total mistakes: 29
SUM: 1*3*1+1*3*1.2+3*1*1.2+2*1*1+6*0.01*1+8*0.01*1+5*0*1.2+3*0*1=3+3.6+3.6+2+0.06+0.08+0+0=12.34


Quality score calculation:

Using the formula: 100-(12.34/1749*1000)=92.94

QSA.png

Manual word count

‎

File details:
Total source words: 3126
Fully reviewed: no
Number of words in a reviewed part of the file: around 1500
Number of units (segments): 392
Project specialization - marketing
Evaluation settings:
‎Evaluated source words: 1500
Evaluation details:
Corrected units: 227
Total source words: 1500

Mistakes:

  1. Major (3 points each):
    1. Terminology: 1 (weight coefficient 1)
    2. Grammar: 1 (weight coefficient 1.2)
  2. Minor (1 point each):
    1. Grammar: 3 (weight coefficient 1.2)
    2. Functional: 2 (weight coefficient 1)
  3. Repetitive (0.01 point each):
    1. Functional: 6 (weight coefficient 1)
    2. Layout: 8 (weight coefficient 1)
  4. Non-scoring (0 points each):
    1. Style: 5 (weight coefficient 1.2)
    2. Terminology: 3 (weight coefficient 1)
Total mistakes: 29
SUM: 1*3*1+1*3*1.2+3*1*1.2+2*1*1+6*0.01*1+8*0.01*1+5*0*1.2+3*0*1=3+3.6+3.6+2+0.06+0.08+0+0=12.34


Quality score calculation:

Using the formula: 100-(12.34/1500*1000)=91.77

QSM.png

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