The State of Practice of Prefabrication
Notice bibliographique
Résumé
In today?s construction industry, electrical contractors must think about adopting non-conventional construction methods such as prefab in order to improve their performance and to face the continuous challenges they encounter. Challenges facing electrical contractors today include: low labor productivity levels, low and fluctuating profit margins and frequent schedule compressions. \nMultiple studies conducted by other researchers revealed that the appropriate use of prefab for many trades has a positive impact on project performance. In general, prefab has the potential to positively impact the project in the following project factors: cost, quality, schedule, safety and productivity. In addition, these studies discussed some impediments for the use of prefab. Common impediments for the use of prefab include increased engineering requirements, transportation considerations and organizational requirements. However, there is a gap in the literature about prefab in the electrical contracting industry. No recent research exists that is specific to the electrical contracting industry. \nBased on the literature review, a comprehensive survey about prefab was prepared. The survey was generated online and emailed to electrical contractors using Qualtrics, which is a web-based survey service. 142 electrical contractors representing diverse regions of the United States and Canada responded to the survey. A substantial variety of electrical works conducted by electrical contractors are represented. In addition, small, medium and large size companies are well represented in these responses. \nOf the 142 electrical contractors who responded to the survey, this research showed that 74 percent currently use prefab. The majority of these current-users began adopting prefab in their companies over five years ago. However, 63 percent of users spend only 1 to 9 percent of their company?s labor hours on prefab. Electrical contractors reported that prefab can help in improving \n \nlabor productivity as they estimated that one productive hour in the shop equals (on average) 2.2 hours in the field. Finally, this study showed that electrical contractors will still have disparate use of prefab during the next two years. On average, users and non-users estimated prefab would be used on 37 percent of electrical construction projects during that time. However, electrical contractors currently using prefab are planning on using prefab on more than 75 percent of their projects during the next two years and 72 percent of electrical contractors that are not currently using prefab anticipate starting use in the next two years. This seems to indicate that as electrical contractors learn to use prefab they use it with increasing frequency which implies that the use of prefab will continue to grow.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».