Enhancing design–bid–build project delivery: A comprehensive review and framework for contractor selection and project optimisation in the construction industry

The construction industry is one of the fastest growing and most profitable in the world. The industry is vital, especially in Qatar where infrastructure is growing. In the construction industry in Qatar, design–bid–build (DBB) is the most common project delivery technique; nonetheless, it has several drawbacks. Through a thorough assessment of the literature, this study attempts to investigate the DBB project delivery technique in the construction sector. A total of 10 studies met the inclusion criteria. The findings demonstrated that in comparison to DB, CM, CMAR and PPP project delivery methods, the DBB project delivery technique has some advantages and disadvantages. Project delivery techniques are crucial to the construction sector, which is essential to the growth of the national economy. The present study examines the design–bid–build (DBB) methodology, which is a traditional paradigm that presents ongoing difficulties in terms of contractor selection and project delivery effectiveness. A thorough examination of the existing studies was carried out using PRISMA guidelines. The study found that there was a substantial knowledge gap, as previous studies have mostly highlighted problems without providing a systematic foundation for remedies. The correct framework should be chosen based on factors including cost, time and location. In Qatar, low-bid projects that have well-defined objectives and well-defined contractor pre-qualification might benefit greatly from the application of the DBB project delivery approach. A few of shortcomings of the research are the researcher’s prejudice, the incompleteness of the material gathered and the analysis of the findings. To replicate better findings, a comparable study can be undertaken in similar geographic places in the future. Robust pre-qualification procedures for contractors, improved designer–contractor communication, incorporation of cutting-edge project management systems and efficient risk management techniques were among the useful suggestions that surfaced. The study emphasises how crucial it is to maximise the DBB approach in the building sector. Subsequent research should corroborate these suggestions, investigate the incorporation of technology, evaluate the extended-term efficacy of undertakings and promote interdisciplinary cooperation. Through this activity, the construction industry may contribute to the sustainable growth and development of the industry by improving project results and the overall efficiency of the DBB model.