Document (#36117)

Author

Jagtap, S.
Johnson, A.

Title

Requirements and use of in-service information in an engineering redesign task : case studies from the aerospace industry

Source

Journal of the American Society for Information Science and Technology. 61(2010) no.12, S.2442-2460

Year

2010

Abstract

This article describes the research stimulated by a fundamental shift that is occurring in the manufacture and marketing of aero engines for commercial and defense purposes, away from the selling of products to the provision of services. This research was undertaken in an aerospace company, which designs and manufactures aero engines and also offers contracts, under which it remains responsible for the maintenance of engines. These contracts allow the company to collect far more data about the in-service performance of their engines than was previously available. This article aims at identifying what parts of this in-service information are required when components or systems of existing engines need to be redesigned because they have not performed as expected in service. In addition, this article aims at understanding how designers use this in-service information in a redesign task. In an attempt to address these aims, we analyzed five case studies involving redesign of components or systems of an existing engine. The findings show that the in-service information accessed by the designers mainly contains the undesired physical actions (e.g., deterioration mechanisms, deterioration effects, etc.) and the causal chains of these undesired physical actions. We identified a pattern in the designers' actions regarding the use of these causal chains. The designers have generated several solutions that utilize these causal chains seen in the in-service information. The findings provide a sound basis for developing tools and methods to support designers in effectively satisfying their in-service information requirements in a redesign task.

Field

Raumfahrt

Area

Informationswirtschaft

Similar documents (author)

1. Johnson, S.W.: Do-it-yourself CD-ROMs (1992) 4.57

   4.566886 = sum of:
     4.566886 = weight(author_txt:johnson in 4284) [ClassicSimilarity], result of:
       4.566886 = score(doc=4284,freq=1.0), product of:
         0.99999994 = queryWeight, product of:
           7.3070183 = idf(docFreq=80, maxDocs=44421)
           0.13685472 = queryNorm
         4.5668864 = fieldWeight in 4284, product of:
           1.0 = tf(freq=1.0), with freq of:
             1.0 = termFreq=1.0
           7.3070183 = idf(docFreq=80, maxDocs=44421)
           0.625 = fieldNorm(doc=4284)
   

2. Johnson, S.: Virtual documents : the past, the present and some standards for the future (1993) 4.57

   4.566886 = sum of:
     4.566886 = weight(author_txt:johnson in 4420) [ClassicSimilarity], result of:
       4.566886 = score(doc=4420,freq=1.0), product of:
         0.99999994 = queryWeight, product of:
           7.3070183 = idf(docFreq=80, maxDocs=44421)
           0.13685472 = queryNorm
         4.5668864 = fieldWeight in 4420, product of:
           1.0 = tf(freq=1.0), with freq of:
             1.0 = termFreq=1.0
           7.3070183 = idf(docFreq=80, maxDocs=44421)
           0.625 = fieldNorm(doc=4420)
   

3. Johnson, R.D.: Public libraries and the Internet / NREN : new challenges, new opportunities (1992) 4.57

   4.566886 = sum of:
     4.566886 = weight(author_txt:johnson in 6247) [ClassicSimilarity], result of:
       4.566886 = score(doc=6247,freq=1.0), product of:
         0.99999994 = queryWeight, product of:
           7.3070183 = idf(docFreq=80, maxDocs=44421)
           0.13685472 = queryNorm
         4.5668864 = fieldWeight in 6247, product of:
           1.0 = tf(freq=1.0), with freq of:
             1.0 = termFreq=1.0
           7.3070183 = idf(docFreq=80, maxDocs=44421)
           0.625 = fieldNorm(doc=6247)
   

4. Johnson, F.C.: ¬A classification of ellipsis based on a corpus of information seeking dialogues (1994) 4.57

   4.566886 = sum of:
     4.566886 = weight(author_txt:johnson in 7802) [ClassicSimilarity], result of:
       4.566886 = score(doc=7802,freq=1.0), product of:
         0.99999994 = queryWeight, product of:
           7.3070183 = idf(docFreq=80, maxDocs=44421)
           0.13685472 = queryNorm
         4.5668864 = fieldWeight in 7802, product of:
           1.0 = tf(freq=1.0), with freq of:
             1.0 = termFreq=1.0
           7.3070183 = idf(docFreq=80, maxDocs=44421)
           0.625 = fieldNorm(doc=7802)
   

5. Johnson, A.: Information brokers (1991) 4.57

   4.566886 = sum of:
     4.566886 = weight(author_txt:johnson in 1362) [ClassicSimilarity], result of:
       4.566886 = score(doc=1362,freq=1.0), product of:
         0.99999994 = queryWeight, product of:
           7.3070183 = idf(docFreq=80, maxDocs=44421)
           0.13685472 = queryNorm
         4.5668864 = fieldWeight in 1362, product of:
           1.0 = tf(freq=1.0), with freq of:
             1.0 = termFreq=1.0
           7.3070183 = idf(docFreq=80, maxDocs=44421)
           0.625 = fieldNorm(doc=1362)
   

Similar documents (content)

1. Faust, J.: Positive design (2009) 0.13

   0.1260192 = sum of:
     0.1260192 = product of:
       0.63009596 = sum of:
         0.024444407 = weight(abstract_txt:article in 87) [ClassicSimilarity], result of:
           0.024444407 = score(doc=87,freq=1.0), product of:
             0.06862762 = queryWeight, product of:
               1.3092576 = boost
               3.79935 = idf(docFreq=2702, maxDocs=44421)
               0.013796359 = queryNorm
             0.35618907 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.79935 = idf(docFreq=2702, maxDocs=44421)
               0.09375 = fieldNorm(doc=87)
         0.0124192545 = weight(abstract_txt:this in 87) [ClassicSimilarity], result of:
           0.0124192545 = score(doc=87,freq=1.0), product of:
             0.055053666 = queryWeight, product of:
               1.658379 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.013796359 = queryNorm
             0.2255845 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.09375 = fieldNorm(doc=87)
         0.012616388 = weight(abstract_txt:information in 87) [ClassicSimilarity], result of:
           0.012616388 = score(doc=87,freq=1.0), product of:
             0.055634722 = queryWeight, product of:
               1.6671076 = boost
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.013796359 = queryNorm
             0.22677183 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.09375 = fieldNorm(doc=87)
         0.27199945 = weight(abstract_txt:designers in 87) [ClassicSimilarity], result of:
           0.27199945 = score(doc=87,freq=2.0), product of:
             0.3218826 = queryWeight, product of:
               3.6605706 = boost
               6.3735914 = idf(docFreq=205, maxDocs=44421)
               0.013796359 = queryNorm
             0.84502685 = fieldWeight in 87, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.3735914 = idf(docFreq=205, maxDocs=44421)
               0.09375 = fieldNorm(doc=87)
         0.30861643 = weight(abstract_txt:redesign in 87) [ClassicSimilarity], result of:
           0.30861643 = score(doc=87,freq=1.0), product of:
             0.40954804 = queryWeight, product of:
               3.6931543 = boost
               8.037906 = idf(docFreq=38, maxDocs=44421)
               0.013796359 = queryNorm
             0.7535536 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.037906 = idf(docFreq=38, maxDocs=44421)
               0.09375 = fieldNorm(doc=87)
       0.2 = coord(5/25)
   

2. Cleverley, P.H.; Burnett, S.; Muir, L.: Exploratory information searching in the enterprise : a study of user satisfaction and task performance (2017) 0.12

   0.12265876 = sum of:
     0.12265876 = product of:
       0.5110782 = sum of:
         0.06535148 = weight(abstract_txt:defense in 4319) [ClassicSimilarity], result of:
           0.06535148 = score(doc=4319,freq=1.0), product of:
             0.12010745 = queryWeight, product of:
               8.705735 = idf(docFreq=19, maxDocs=44421)
               0.013796359 = queryNorm
             0.54410845 = fieldWeight in 4319, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.705735 = idf(docFreq=19, maxDocs=44421)
               0.0625 = fieldNorm(doc=4319)
         0.008279502 = weight(abstract_txt:this in 4319) [ClassicSimilarity], result of:
           0.008279502 = score(doc=4319,freq=1.0), product of:
             0.055053666 = queryWeight, product of:
               1.658379 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.013796359 = queryNorm
             0.15038967 = fieldWeight in 4319, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.0625 = fieldNorm(doc=4319)
         0.0118948445 = weight(abstract_txt:information in 4319) [ClassicSimilarity], result of:
           0.0118948445 = score(doc=4319,freq=2.0), product of:
             0.055634722 = queryWeight, product of:
               1.6671076 = boost
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.013796359 = queryNorm
             0.21380253 = fieldWeight in 4319, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.0625 = fieldNorm(doc=4319)
         0.08593207 = weight(abstract_txt:task in 4319) [ClassicSimilarity], result of:
           0.08593207 = score(doc=4319,freq=6.0), product of:
             0.114417695 = queryWeight, product of:
               1.6905276 = boost
               4.9057617 = idf(docFreq=893, maxDocs=44421)
               0.013796359 = queryNorm
             0.7510383 = fieldWeight in 4319, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.9057617 = idf(docFreq=893, maxDocs=44421)
               0.0625 = fieldNorm(doc=4319)
         0.1410132 = weight(abstract_txt:aerospace in 4319) [ClassicSimilarity], result of:
           0.1410132 = score(doc=4319,freq=1.0), product of:
             0.25268698 = queryWeight, product of:
               2.0512636 = boost
               8.928879 = idf(docFreq=15, maxDocs=44421)
               0.013796359 = queryNorm
             0.5580549 = fieldWeight in 4319, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.928879 = idf(docFreq=15, maxDocs=44421)
               0.0625 = fieldNorm(doc=4319)
         0.19860709 = weight(abstract_txt:causal in 4319) [ClassicSimilarity], result of:
           0.19860709 = score(doc=4319,freq=2.0), product of:
             0.28846508 = queryWeight, product of:
               2.6842458 = boost
               7.7894444 = idf(docFreq=49, maxDocs=44421)
               0.013796359 = queryNorm
             0.6884961 = fieldWeight in 4319, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.7894444 = idf(docFreq=49, maxDocs=44421)
               0.0625 = fieldNorm(doc=4319)
       0.24 = coord(6/25)
   

3. Rose, D.E.: Reconciling information-seeking behavior with search user interfaces for the Web (2006) 0.11

   0.11410388 = sum of:
     0.11410388 = product of:
       0.40751386 = sum of:
         0.12608151 = weight(abstract_txt:redesigned in 296) [ClassicSimilarity], result of:
           0.12608151 = score(doc=296,freq=1.0), product of:
             0.12817654 = queryWeight, product of:
               1.0330452 = boost
               8.993418 = idf(docFreq=14, maxDocs=44421)
               0.013796359 = queryNorm
             0.9836551 = fieldWeight in 296, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.993418 = idf(docFreq=14, maxDocs=44421)
               0.109375 = fieldNorm(doc=296)
         0.028518474 = weight(abstract_txt:article in 296) [ClassicSimilarity], result of:
           0.028518474 = score(doc=296,freq=1.0), product of:
             0.06862762 = queryWeight, product of:
               1.3092576 = boost
               3.79935 = idf(docFreq=2702, maxDocs=44421)
               0.013796359 = queryNorm
             0.4155539 = fieldWeight in 296, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.79935 = idf(docFreq=2702, maxDocs=44421)
               0.109375 = fieldNorm(doc=296)
         0.01448913 = weight(abstract_txt:this in 296) [ClassicSimilarity], result of:
           0.01448913 = score(doc=296,freq=1.0), product of:
             0.055053666 = queryWeight, product of:
               1.658379 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.013796359 = queryNorm
             0.26318192 = fieldWeight in 296, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.109375 = fieldNorm(doc=296)
         0.020815978 = weight(abstract_txt:information in 296) [ClassicSimilarity], result of:
           0.020815978 = score(doc=296,freq=2.0), product of:
             0.055634722 = queryWeight, product of:
               1.6671076 = boost
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.013796359 = queryNorm
             0.37415442 = fieldWeight in 296, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.109375 = fieldNorm(doc=296)
         0.061392836 = weight(abstract_txt:task in 296) [ClassicSimilarity], result of:
           0.061392836 = score(doc=296,freq=1.0), product of:
             0.114417695 = queryWeight, product of:
               1.6905276 = boost
               4.9057617 = idf(docFreq=893, maxDocs=44421)
               0.013796359 = queryNorm
             0.5365677 = fieldWeight in 296, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9057617 = idf(docFreq=893, maxDocs=44421)
               0.109375 = fieldNorm(doc=296)
         0.027945122 = weight(abstract_txt:these in 296) [ClassicSimilarity], result of:
           0.027945122 = score(doc=296,freq=1.0), product of:
             0.08027278 = queryWeight, product of:
               1.8280337 = boost
               3.1828754 = idf(docFreq=5006, maxDocs=44421)
               0.013796359 = queryNorm
             0.348127 = fieldWeight in 296, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1828754 = idf(docFreq=5006, maxDocs=44421)
               0.109375 = fieldNorm(doc=296)
         0.1282708 = weight(abstract_txt:engines in 296) [ClassicSimilarity], result of:
           0.1282708 = score(doc=296,freq=1.0), product of:
             0.22170876 = queryWeight, product of:
               3.0380259 = boost
               5.2896495 = idf(docFreq=608, maxDocs=44421)
               0.013796359 = queryNorm
             0.5785554 = fieldWeight in 296, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.2896495 = idf(docFreq=608, maxDocs=44421)
               0.109375 = fieldNorm(doc=296)
       0.28 = coord(7/25)
   

4. Search services and gateways (1992) 0.10

   0.10045991 = sum of:
     0.10045991 = product of:
       0.50229955 = sum of:
         0.08168934 = weight(abstract_txt:defense in 4290) [ClassicSimilarity], result of:
           0.08168934 = score(doc=4290,freq=1.0), product of:
             0.12010745 = queryWeight, product of:
               8.705735 = idf(docFreq=19, maxDocs=44421)
               0.013796359 = queryNorm
             0.68013555 = fieldWeight in 4290, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.705735 = idf(docFreq=19, maxDocs=44421)
               0.078125 = fieldNorm(doc=4290)
         0.03859952 = weight(abstract_txt:case in 4290) [ClassicSimilarity], result of:
           0.03859952 = score(doc=4290,freq=2.0), product of:
             0.07286421 = queryWeight, product of:
               1.1015067 = boost
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.013796359 = queryNorm
             0.52974594 = fieldWeight in 4290, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.078125 = fieldNorm(doc=4290)
         0.07143869 = weight(abstract_txt:company in 4290) [ClassicSimilarity], result of:
           0.07143869 = score(doc=4290,freq=1.0), product of:
             0.13838594 = queryWeight, product of:
               1.5180148 = boost
               6.6077175 = idf(docFreq=162, maxDocs=44421)
               0.013796359 = queryNorm
             0.51622796 = fieldWeight in 4290, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.6077175 = idf(docFreq=162, maxDocs=44421)
               0.078125 = fieldNorm(doc=4290)
         0.17626652 = weight(abstract_txt:aerospace in 4290) [ClassicSimilarity], result of:
           0.17626652 = score(doc=4290,freq=1.0), product of:
             0.25268698 = queryWeight, product of:
               2.0512636 = boost
               8.928879 = idf(docFreq=15, maxDocs=44421)
               0.013796359 = queryNorm
             0.69756866 = fieldWeight in 4290, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.928879 = idf(docFreq=15, maxDocs=44421)
               0.078125 = fieldNorm(doc=4290)
         0.13430548 = weight(abstract_txt:service in 4290) [ClassicSimilarity], result of:
           0.13430548 = score(doc=4290,freq=2.0), product of:
             0.26558822 = queryWeight, product of:
               4.205953 = boost
               4.576989 = idf(docFreq=1241, maxDocs=44421)
               0.013796359 = queryNorm
             0.50569063 = fieldWeight in 4290, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.576989 = idf(docFreq=1241, maxDocs=44421)
               0.078125 = fieldNorm(doc=4290)
       0.2 = coord(5/25)
   

5. Heery, R.; Carpenter, L.; Day, M.: Renardus project developments and the wider digital library context (2001) 0.10

   0.09674246 = sum of:
     0.09674246 = product of:
       0.26872903 = sum of:
         0.009911823 = weight(abstract_txt:existing in 2219) [ClassicSimilarity], result of:
           0.009911823 = score(doc=2219,freq=1.0), product of:
             0.06831751 = queryWeight, product of:
               1.0665864 = boost
               4.6427093 = idf(docFreq=1162, maxDocs=44421)
               0.013796359 = queryNorm
             0.14508466 = fieldWeight in 2219, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6427093 = idf(docFreq=1162, maxDocs=44421)
               0.03125 = fieldNorm(doc=2219)
         0.013796941 = weight(abstract_txt:requirements in 2219) [ClassicSimilarity], result of:
           0.013796941 = score(doc=2219,freq=1.0), product of:
             0.08516965 = queryWeight, product of:
               1.1908922 = boost
               5.1837964 = idf(docFreq=676, maxDocs=44421)
               0.013796359 = queryNorm
             0.16199364 = fieldWeight in 2219, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1837964 = idf(docFreq=676, maxDocs=44421)
               0.03125 = fieldNorm(doc=2219)
         0.008148136 = weight(abstract_txt:article in 2219) [ClassicSimilarity], result of:
           0.008148136 = score(doc=2219,freq=1.0), product of:
             0.06862762 = queryWeight, product of:
               1.3092576 = boost
               3.79935 = idf(docFreq=2702, maxDocs=44421)
               0.013796359 = queryNorm
             0.11872969 = fieldWeight in 2219, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.79935 = idf(docFreq=2702, maxDocs=44421)
               0.03125 = fieldNorm(doc=2219)
         0.011708985 = weight(abstract_txt:this in 2219) [ClassicSimilarity], result of:
           0.011708985 = score(doc=2219,freq=8.0), product of:
             0.055053666 = queryWeight, product of:
               1.658379 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.013796359 = queryNorm
             0.21268311 = fieldWeight in 2219, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.03125 = fieldNorm(doc=2219)
         0.009403701 = weight(abstract_txt:information in 2219) [ClassicSimilarity], result of:
           0.009403701 = score(doc=2219,freq=5.0), product of:
             0.055634722 = queryWeight, product of:
               1.6671076 = boost
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.013796359 = queryNorm
             0.16902575 = fieldWeight in 2219, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.03125 = fieldNorm(doc=2219)
         0.020230552 = weight(abstract_txt:aims in 2219) [ClassicSimilarity], result of:
           0.020230552 = score(doc=2219,freq=1.0), product of:
             0.12583417 = queryWeight, product of:
               1.772862 = boost
               5.144689 = idf(docFreq=703, maxDocs=44421)
               0.013796359 = queryNorm
             0.16077153 = fieldWeight in 2219, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.144689 = idf(docFreq=703, maxDocs=44421)
               0.03125 = fieldNorm(doc=2219)
         0.011291534 = weight(abstract_txt:these in 2219) [ClassicSimilarity], result of:
           0.011291534 = score(doc=2219,freq=2.0), product of:
             0.08027278 = queryWeight, product of:
               1.8280337 = boost
               3.1828754 = idf(docFreq=5006, maxDocs=44421)
               0.013796359 = queryNorm
             0.14066455 = fieldWeight in 2219, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1828754 = idf(docFreq=5006, maxDocs=44421)
               0.03125 = fieldNorm(doc=2219)
         0.06411088 = weight(abstract_txt:designers in 2219) [ClassicSimilarity], result of:
           0.06411088 = score(doc=2219,freq=1.0), product of:
             0.3218826 = queryWeight, product of:
               3.6605706 = boost
               6.3735914 = idf(docFreq=205, maxDocs=44421)
               0.013796359 = queryNorm
             0.19917473 = fieldWeight in 2219, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.3735914 = idf(docFreq=205, maxDocs=44421)
               0.03125 = fieldNorm(doc=2219)
         0.12012648 = weight(abstract_txt:service in 2219) [ClassicSimilarity], result of:
           0.12012648 = score(doc=2219,freq=10.0), product of:
             0.26558822 = queryWeight, product of:
               4.205953 = boost
               4.576989 = idf(docFreq=1241, maxDocs=44421)
               0.013796359 = queryNorm
             0.45230347 = fieldWeight in 2219, product of:
               3.1622777 = tf(freq=10.0), with freq of:
                 10.0 = termFreq=10.0
               4.576989 = idf(docFreq=1241, maxDocs=44421)
               0.03125 = fieldNorm(doc=2219)
       0.36 = coord(9/25)