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Qualitative analysis of Request For Information to identify design flaws in steel construction projects

Mathieu Fokwa Soh
Mathieu Fokwa Soh
, 
Daniel Barbeau
Daniel Barbeau
, 
Sylvie Doré
Sylvie Doré
 et 
Daniel Forgues
Daniel Forgues
   | 22 avr. 2020
Organization, Technology and Management in Construction: an International Journal's Cover Image
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Article Category: Research Paper
Publié en ligne: 22 avr. 2020
Pages: 2083 - 2094
Reçu: 02 déc. 2019
Accepté: 21 févr. 2020
DOI: https://doi.org/10.2478/otmcj-2020-0005
Mots clés
© 2020 Mathieu Fokwa Soh et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

The process to identify recurrent words in RFIs.
The process to identify recurrent words in RFIs.

Fig. 2

Relationships between the three most frequent words in the RFIs of small projects and the other recurrent words.
Relationships between the three most frequent words in the RFIs of small projects and the other recurrent words.

Fig. 3

Relationships between the three most frequent words in the RFIs of medium projects and the other recurrent words.
Relationships between the three most frequent words in the RFIs of medium projects and the other recurrent words.

Fig. 4

Links between the three most frequent words in the RFIs of large projects.
Links between the three most frequent words in the RFIs of large projects.

Set of parameters describing selected projects

Small projects (SP)CodificationsSP1SP2SP3SP4SP5SP6SP7SP8Total
RFIs quantities12447427810532289111828
Response time (in days)4144726797531,7807873,4961,4519,832
Medium projects (MP)CodificationsMP1MP2MP3MP4MP5MP6MP7MP8
RFIs quantities1921914572025813241982242,369
Response time (in days)3,0472,7011,8903,1351,3711,2642,5924,70120,701
Large projects (LP)CodificationsLP1LP2LP3LP4LP5LP6LP7LP8LP9LP10
RFIs quantities6724,6933171,6508211,3042,3401,8085171,08915,211
Response time (in days)62,128297,23014,44838,3218,1257,96842,34811,6728,97017,384508,594

The impact of the word Connection on the RFIs studied

CodificationsRFIs quantitiesRFIs (Qty) with connectionRFIs (Qty) with connection (%)Average of RFIs with connection (%)Standard deviationResponse time (in days)Waiting days for RFIs with connectionWaiting days of RFIs with connection (%)Average of waiting days of RFIs with ConnectionStandard deviation
Large projectsLP16727511.16150.1162,12811,88519.1310%0.16
LP24,69330.06297,2306830.23
LP33176119.2414,4485,55138.42
LP41,65046228.0038,32116,17742.21
LP582113816.818,1252473.04
LP61,30442632.677,9682,79935.13
LP72,34065928.1642,34810,08923.82
LP81,80837820.9111,6721,25610.76
LP9517285.428,9701581.76
LP101,08911010.1017,3841,87410.78
15,2112340508,59450,71910.78
Medium projectsMP11924020.83210.123,04744314.5417%0.13
MP21912915.182,70138514.25
MP34575812.691,89021811.53
MP42025828.713,1351,10935.37
MP558123941.141,37152037.93
MP6324329.881,264776.09
MP719831.522,59260.23
MP82244419.644,70173315.59
2,36950320,7013,491
Small projectsSP11242923.39170.074148721.0114%0.07
SP247714.89472204.24
SP342614.2967910916.05
SP47867.6975311915.80
SP51051110.481,780854.78
SP63213.13787597.50
SP72896422.153,49672420.71
SP81111412.611,45116711.51
8281389,8321,370

Example of how to group and classify RFIs

RFI_N°RFIsRFI_Issued_DateRFI_Response_DateResponse_Time (in days)
1Dimensions discrepancies between grids16/02/201717/02/20171
2Beam size discrepancy16/02/201717/02/20171
……………
NNon-standard W beam size16/02/201717/02/20171

The words most present in the set of RFIs for large projects

WordsFrequency of wordsSimilar wordsRFIs concerned (%)Corresponding response time (%)
Confirm2,383Confirm, confirmation, confirmations, confirmed167
Connections2,325Connect, connected, connecting, connection, connections1510
Clarify2,305Clarifie, clarified, clarify44
Levels2,214Level, levels1418
Layout1,818Layout, layouts1215
Beams1,592Beam, beam@, beams104
Provide1,549Provide, provided, provides, providing105
Detail1,121Detail, detailed, detailing, details75
Zones978Zone, zones618
Elevator802Elev, elevation, elevation@, elevations, elevator, elevators55
Dimensions799Dimension, dimension@, dimensions52
Missing792Missed, missing53
Plates751Plate, plate@, plated, plates51
Lines739Line, lines53
Confirm or provide3,9322612

Words most frequent in the set of small project RFIs

WordsFrequency of wordsSimilar wordsRFIs concerned (%)Corresponding response time (%)
Provide148provide, provided1818
Connections119Connectant, connection, connections1714
Confirm118Confirm, confirmation, confirme, confirmed2016
Beam110Beam, beams1310
Detail80Detail, details1012
Location72Locate, location, locations89
Dimension69Dimension, dimensions89
Plate67Plate, plates98
Missing62Missing69
Column60Column, columns87
Elevation51Elevation, elevator79
Roof51Roof48
Complexe45Complexe54
Provide or confirm2663834

Words most present in the set of medium projects RFIs

WordsFrequency of wordsSimilar wordsRFIs concerned (%)Corresponding response time (%)
Confirm897Confirm, confirmation, confirmed, confirmer3820
Connections499Connect, connectant, connected, connection, connections2117
Provide440Provide, provided1925
Beam261Beam, beams99
Sketches245Sketch, sketched, sketches103
Dimension192Dimension, dimensions812
Column190Column, columns89
Location178Locate, located, locating, location, locational, locations813
Detail137Detail, detailed, detailing, details610
Plate134Plate, plates65
Lines128Line, lines64
Stair121Stair, stair#1, stair#2, stair#7, stairs510
Grids117Grid, grids54
Elevator114Elev, elevation, elevations, elevator, elevators47
Brace110Brace, braced, braces, bracing, bracings32
Confirm or provide13375745
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