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It is thought that there is a low level of awareness of key competencies that drive material waste reduction at the construction stage of a project which has led to the low impact of waste minimization in the construction industry. The awareness and the implementation of the various competencies that drive waste minimization shall ensure proper collaboration among construction stakeholders as well as a positive attitude towards waste minimization to enhance high productivity.
No | Competency | Brief Explanation | Component | Reference |
---|---|---|---|---|
1 | Leadership | In managing construction waste, the construction manager must be able to provide direction to inspire others, track his weaknesses and strengths, and show personal commitment to pursuing waste minimization. | Skill | Geoghegan and Dulewiz [34] |
2 | Effective Communication | The construction manager or the head in charge of waste minimization at the construction site should be able to efficiently communicate with all parties involved in construction waste reduction on policies governing waste management to fulfill sustainability goals. Effective communication of organizational waste management policy mobilizes support for the minimization objectives. | Skill | Li et al. [41] |
3 | Waste Management Plan Implementation | Developing and implementing a waste management plan contribute immensely to construction waste reduction at the construction stage of a project. It helps identify the forms of waste and their sources and specifies mitigating measures for them. The plan reflects the peculiarities of the project in terms of the nature and amount of waste anticipated and prescribes ways of managing them. | Skill | Alvanchi et al. [39] |
4 | Supply Chain Management (SCM) Skills | Supply chain management skills involve the capacity to obtain suppliers’ highest commitment, achieve just-in-time delivery, and enable lean construction in order to avoid waste due to long storage or ordering unneeded materials. The just-in-time delivery approach enables the usage of material as and when needed. This reduces double handling and damage that erupts from long storage. | Skill | Al-Hajj and Hamani [42] and Tatham [38] |
5 | Material Logistic Plan Implementation | Logistics management involves effective planning of materials ordering and purchase, inbound and on-site materials movement, and materials storage. Bearing skills in logistics management ensures efficient waste reduction. | Skill | Alvanchi et al. [39] |
6 | Teamwork | Working cooperatively with others as opposed to separately or competitively is a prerequisite for influencing a team to perform in a desirable manner. This, therefore, means teamwork is an important factor when talking about key competencies that drive waste minimization at the construction stage of a project. The construction manager should ensure that effective coordination exists among all project stakeholders (i.e., clients, consultants, and suppliers) in the drive to waste minimization at a construction site. Effective communication, information sharing, early warning systems, and early contribution of expertise on construction waste need to be enhanced to prevent construction errors, reworks, and waste. | Skill | Hwang and Ng [43] |
7 | Delegation | Delegating decision-making power to employees can lead to more innovative ideas and solutions for waste minimization. Employees who are closer to the work processes are often better placed to identify opportunities for reducing waste and can implement changes more effectively. Delegation can ensure that the responsibility, decision-making, training, and accountability are distributed across the organization, resulting in more effective waste reduction strategies and a culture of sustainability. | Skill | Shi et al. [44] |
8 | Problem solving skills | By using problem-solving skills to identify potential sources of waste, analyze the root cause of waste, develop and implement waste reduction strategies, and monitor and adjust waste reduction efforts, the project team can significantly reduce waste and improve project efficiency. | Skill | Shi et al. [44] |
9 | Onsite practical skill | Skilled workers can use their expertise to cut and shape materials in the most efficient way possible, minimizing waste by avoiding unnecessary cuts or shaping. By implementing efficient material selection, cutting and shaping, reuse and recycling, lean construction techniques, and minimizing errors, skilled workers can help to reduce waste and improve the sustainability of the construction industry. |
Skill | Shi et al. [44] |
10 | Personnel quality | High-quality personnel can drive waste minimization by implementing and monitoring waste reduction practices, continuously improving processes, and ensuring that products are manufactured with minimal waste. This can help organizations reduce costs, improve efficiency, and enhance their environmental sustainability. | Skill | Shi et al. [44] |
11 | Professional learning | By providing education and training on waste reduction practices and promoting the use of sustainable materials and lean construction practices, construction professionals can help reduce the amount of waste generated during construction and improve the environmental sustainability of buildings. | Skill | Shi et al. [44] |
12 | Creative thinking | Creative thinking is a key ingredient in driving waste minimization during the construction phase of a building project. By thinking outside the box, it is possible to identify new opportunities to reduce waste, optimize processes, and create sustainable buildings that minimize their environmental impact. | Skill | Shi et al. [44] |
13 | Personnel commitment to pursuing an ethical solution to waste minimization | By fostering a culture of waste minimization, identifying opportunities for waste reduction, implementing waste reduction strategies, monitoring progress, and encouraging collaboration and communication, project leaders can help minimize waste and create sustainable buildings that have a minimal impact on the environment. | Skill | Ajayi [37] |
14 | Provision of direction to inspire others | Providing direction involves setting clear goals and targets for waste minimization. By articulating specific waste reduction targets and communicating them clearly to the construction team, project leaders can inspire others to take action and prioritize waste minimization in their work. | Skill | Geoghegan and Dulewiz [34] |
15 | Awareness of CW minimization practices | Awareness of CW minimization practices is necessary for waste minimization during the construction phase of a building project since professionals will only indulge in practices they are conversant or knowledgeable of. | Knowledge | Pittri et al. [45] |
16 | Construction Sequencing and Planning | Most waste on construction sites happens due to a lack of planning and sequencing of construction activities. Planning and scheduling is a critical factor in the quest to achieve sustainability; hence, it needs to be well addressed and reflected in construction schedules to avoid any delays and wastage of materials. | Knowledge | Hwang and Ng [43] |
17 | Health and Safety Management | The construction manager needs to understand the health impact of construction waste on site workers and the danger improper management of construction waste brings. Accidents that normally happen from poor site waste management could be reduced through proper health and safety management. | Knowledge | Hwang and Ng [43] |
18 | Human Resource Management | In human resource management, practices such as organizing waste management and materials handling vocational training for operatives, having a dedicated site team or specialist sub-contract package for on-site waste management, the appointment of labor solely for waste management, etc., could enhance the minimization of waste. | Knowledge | Ajayi [37] |
19 | Modern Construction Methods | Modern construction methods, such as the use of prefabricated construction products and modular construction, contribute to construction waste minimization at the construction stage of a project. Prefabrication makes use of precast components and modules, modular construction techniques, and other offsite technologies. Modular construction also refers to factory-produced building units that are delivered and assembled on-site as building elements or volumetric components. The use of precast materials has the potential to reduce the amount of on-site damage and rework, thereby contributing to waste reduction output by up to 84%. | Knowledge | Ajayi [37] |
20 | Reuse and Recycling of Waste | The recycled content as well, as the recyclability of construction material, enhances sustainability which eventually contributes to waste reduction as the recycled content of ready-mixed concrete makes it sustainable. Using materials that can be recycled reduces the use of raw materials and embodied energy. Additionally, recycling takes less energy than producing whole new material. | Knowledge | Kabirifar et al. [46] |
21 | Standardization and the Implementation of Sustainable Construction Practices | In the construction phase of a project, standard material sizes could be opted for to reduce waste during trimming processes. Mixing of concrete can also be done on-site to readily control the amount needed. Minimal construction waste during installation reduces the need for landfill space and also provides cost savings. Knowledge of sustainable construction practices ensures effective waste reduction. | Knowledge | Kabirifar et al. [46] |
22 | Adherence to Project Design/Drawings | This includes ensuring that materials, equipment, and construction methods are in line with the design, as well as implementing any necessary changes or modifications in a way that maintains the integrity of the overall project design. Adherence to project design/drawings is essential for ensuring waste minimization. | Knowledge | Osmani et al. [47] |
23 | Waste Auditing to Monitor Environmental Performance | A waste audit is a systematic process of quantifying and characterizing the types and amounts of waste generated by an organization or community. The goal of a waste audit is to identify opportunities for waste reduction, reuse, and recycling, as well as to assess the effectiveness of current waste management practices. This helps to monitor the environmental performance of any project. | Knowledge | Osmani et al. [47] |
24 | Thorough review of the project specifications by contractors at the construction stage | The contractors responsible for carrying out the construction work should carefully examine and analyze the project specifications before beginning any construction activities. This review is important to ensure that the contractors fully understand the project requirements, such as design plans, building codes, safety regulations, sustainable plans for waste reduction, and other relevant specifications. | Knowledge | Osmani et al. [47] |