Study on the factors of delay in construction works

Abstract

The delay in civil construction works is observed globally and affects the economy of countries. Therefore, identifying the causes of delays is of paramount importance to minimize their consequences. This paper aims at identifying the causes of delay in construction works and their analysis and existing correlations through statistical factor analysis. The research methodology included a Systematic Literature Review (SLR), a Survey Research through questionnaires and interviews was conducted, as well as the identification of the main causes of delay through the Relative Importance Index (RIL) and the ABC Curve. Finally, factor analysis of the causes of delay was performed, not limiting only to their identification. The results showed that the 12 identified causes are correlated to 4 delay factors, which account for 69.18% of the sample variance: supply management (21.41%); workforce management (20,79%); project management (17.64%) and management of climatic conditions (9.34%). It is concluded hereby that the delay factors mentioned herein can be considered management deficiencies in the projects and that the research has expanded the knowledge on construction delays, thus contributing to the frontier of knowledge to mitigate this problem in several countries, especially developing ones.

Desvio de custo em obras de pequeno porte

“…acontecer por vários motivos, como questões técnicas, circunstâncias econômicas e até mesmo a pedido do cliente [30]. Em seguida, tem-se PR3 "falta de detalhamento do projeto na elaboração do orçamento" e PR4 "falhas em projetos".…”

Desvio de prazo em obras de pequeno porte

“…Escopo do projeto EP1 Aditivos no escopo [13,21,22] EP2 Mudanças frequentes no projeto [1,4,10,11,12,13,14,15,19,22,23] Qualidade do projeto QP1 Falta de detalhamento do projeto na elaboração do orçamento [20,21,23] QP2 Falhas em projetos [1,5,10,13,15,19,20] Planejamento do custo PC1 Serviços não previstos no orçamento [3] PC2 Falta de conhecimento da produtividade real na elaboração das composições [5,10] PC3 Levantamento de quantitativos de serviços subestimados [16] PC4 Custo unitário incorreto dos materiais [10,13,15,19] Planejamento do tempo PT1 Planejamento insuficiente [3,4,5,10,12,13,16,19,20] PT2 Alto custo indireto em períodos de baixa produtividade [21] Execução do Serviço ES1 Retrabalho devido a erro [1,3,5,10,…”

“…Atraso em obra ainda é um desafio recorrentes na construção civil [1,2]. Por exemplo, De Filippi e Melhado verificaram um desvio de prazo médio de 22% em 32 empreendimentos na capital paulista [3].…”

“…Essa problemática tem sido alvo de diversos estudos que buscam compreender as causas desses desvios [1,4,5,6,7]. Esses estudos, entretanto, não distinguem a influência do porte da obra ou da empresa.…”

Dynamics of Pertinent Project Delay Variables in the Thai Construction Sector: Mathematical Analysis

“…Construction delays are a global phenomenon affecting national economies. Delays in construction project delivery, which is one of the biggest problems in construction management, remain a recurring phenomenon common in developed and emerging economies, often occurring from the design stage to the closeout stage (Carvalho et al, 2021;Jayaraman, 2021;Zhang, 2020). This extension in the time scheduled for project completion is usually a major loss to any construction project, and it decreases the country's GDP (Vishal & Myneni, 2021).…”