چكيده به لاتين
Abstract:
Nowadays, with the development of science and technology in projects, the necessity of developing the concept of quality in order to assess, create, control, improve, and maintain it has been addressed more than ever. On the other hand, regarding the large volume of the required financing for investment and implement of the gas transmission projects in the world, the sensitivity of such projects in terms of safety, durability and environment, customers’ demands and expectations, the need for mobility, dynamicity and success of these projects are from the important purposes of the study in development of the concept of quality in the projects of gas transmission lines.
First, Iran’s projects of gas transmission lines were chosen as the target society in order for studying and collecting the required data. Hence, based on George Kelly’s Personal Construct theory and using the Treasury Network Technique, 20 managers and authorities involved in these projects were interviewed and it was developed by ladder method, which resulted in the extraction of 272 quality constructs. Then, these basic constructs were classified into 40 constructs using the content analysis technique and they formed the treasury matrix network. In this stage, t-test was used to investigate the conformity of the constructs with the concept of quality; and the experts were employed to examine and confirm the obtained constructs.
Next, the following measurements were taken in order to achieve the study’s purposes including five main outputs including 1) clustering the constructs and identifying the important quality constructs, 2) designing the integrated models of the role and importance of the constructs in the lifecycle of the project, 3) classifying the constructs in elements and identifying the important constructs in the floors, 4) prioritizing the elements, and finally, 5) presenting the conceptual model using structural equations:
In order to identify the important constructs (the output 1), the extracted constructs were classified using the cluster hierarchical analysis and the constructs’ clustering was fixed by obtaining the comments of experts. Then, the binomial test was used in order to examine the conformity among the constructs and Pareto statistical analysis was used in two stages in each cluster and between the clusters to determine the representatives of clusters. These constructs include conformity with standards, qualification, proper design and engineering, effective control and monitoring, proper implementation, desirability, convergence, accountability and integrity.
To design the integrated models (the output 2), first the importance of quality features in the stages of the lifecycle of the project, i.e. onset, planning, implementation, monitoring, and termination of the project were determined by designing questionnaires and obtaining the comments of 35 authorities of the projects of gas transmission lines. Then, the integrated models were designed with the aim of describing the role of these constructs in the matrix space consisted of the dimensions of a) quality aspects in construction projects, b) the project’s lifecycle, and c) the effective variables.
In order to classify the constructs in elements (the output 3), the constructs extracted from the study were classified into six elements of the highest quality project. The lowest quality project, the high quality project, the low quality project, the medium quality project, and the ideal quality project through using LISREL statistical analysis tool; and regarding the interpretation of the results of modeling the structural equations, and factor load, the floors’ representatives were selected including the requirements’ supply constructs, integrity, flexibility, expertise, cohesion, low-consumption, future prospect, adequacy of documents, technologicalism, compliance with standards, effective control and monitoring, and facilities’ architectural beauty.
In order to prioritize the elements (the output 4), they were prioritized using SPSS software and Friedman test. Given the study’s results, the element of the ideal quality project is the highest prioritized one; and the element of the lowest quality project is the lowest prioritized element.
In order to present the conceptual model (the output 5), the total compatibility of the conceptual model was fitted and regarding the obtained results from all fitting indices, the fitness of the collected data with the model was indicated and confirmed.
Since no study like this has been carried out in the oil industry, it can be considered as an innovation. In addition, the companies and especially project-based organizations can use the results of this research.
Keywords: Gas Transmission Projects, Construct, Element, Repertory Grid, Cluster, Structural Equations Modeling
