This guide explains how sub-contractors can actively be involved in the construction process and how planning and coordination can support collaboration among contractors at the production stage, where the skills of the sub-contractors make an active contribution to value creation in the process.
2013
22
Early and systematic involvement of sub-contractors creates better coordination, improved work environment and more efficient construction processes. This guide offers tools to integrate sub-contractors’ expertise and competencies into the value-creating construction process.
Sub-contractors often enter projects at a late stage
There are often the best intentions to involve contractors and sub-contractors early in the construction process. However, sub-contractors in particular frequently enter projects at such a late stage that their competencies and expertise cannot enrich the project. This represents a significant lost opportunity for value creation in construction.
The benefits of involving sub-contractors early
By involving sub-contractors either early or during the construction process, contractors can optimize planning, work environment and resource utilization while simultaneously creating ownership and a better construction process. Closer collaboration between contractor and sub-contractors, where sub-contractors become part of the executing team (possibly already in the tender phase), can truly deliver benefits – both in the process, for the work environment and economically.
The guide demonstrates how structured involvement ensures that interfaces, agreements and collaboration are in place before work on the construction site begins. This proactive approach transforms sub-contractors from mere suppliers into active partners in the value creation process, utilizing their specialized knowledge to improve constructability, identify potential issues early, and optimize production sequences.
Summary
The guide provides the construction industry with practical methods for involving sub-contractors as active partners in the construction process. It offers structured approaches to planning and coordination that enable contractors to leverage sub-contractors’ specialized competencies for improved project outcomes and smoother execution. Many of the tools and methods presented are based on Lean Construction-tools – and especially The Last Planner System.
The guide contains:
- Methods for early sub-contractor involvement in project planning
- Tools for conducting joint workshops and coordination meetings
- Risk management strategies involving all executing parties
- Planning methods including phase-scheduling and weekly work planning
- Communication structures for construction site coordination
- Case studies demonstrating successful sub-contractor integration
Facts about this guide
The guide was prepared by Værdibyg in 2013 with support from industry organizations and Realdania. It was developed through active involvement of a competence group including representatives from contractor associations, building owner organizations, and trade associations. The guide draws on experiences from Danish construction projects and includes contributions from contractors and sub-contractors who have successfully implemented collaborative approaches. The guide is supplemented by case studies and video materials available on the Værdibyg website.
Who is the guide aimed at?
The guide is primarily targeted at contractors and sub-contractors who want to improve their mutual collaboration. It is also relevant for main and general contractors seeking to optimize their project execution through better sub-contractor integration. Project managers, site managers and foremen responsible for coordinating multiple trades will find particular value in the systematic approaches presented.
What you get from the guide
By implementing the guide’s recommendations, you achieve better coordinated construction sites with fewer conflicts between trades. You gain tools to tap into sub-contractors’ specialized knowledge early enough to influence project solutions, improve work sequences, and prevent problems before they arise. This results in improved safety performance, better quality outcomes, and more predictable project delivery.
Background
Sub-contractors perform the majority of work on modern construction sites, yet they are often treated as peripheral players who simply execute predetermined solutions. This approach wastes valuable expertise and creates coordination challenges that lead to delays, rework and safety issues. As construction projects become more complex and specialized, the need for effective sub-contractor integration has become critical. This guide addresses these challenges by offering proven methods for transforming sub-contractors into active partners in the construction process.
Supporting expert group
This guide has been produced and published by the industry initiative Værdiskabende Byggeproces (Værdibyg) with assistance from the industry organisations behind Værdibyg and from Realdania.
The authors have been actively supported by the following expert group:
The Danish Building Trade (BAT): Lars Knudsen (NCC), Christian Korsgaard Sørensen
Danish Association of Construction Clients: Knud Erik Busk (Kuben Byg), Claus Dewulff (Hvidovre Hospital)
Danish Construction Association: Ask Hesselager (Enemærke & Petersen a/s), Martin Profit Jakobsen (BASIT), Martin van der Watt (Hoffmann),
Shoukat Naeimi (Hoffmann), Jens Thamdrup (NCC)
DI Byg: Amer H. Kamal (MT Højgaard), Morten Walbeck (Jakon)
Danish Association of Consulting Engineers: Ib Stejlborg (Strunge Jensen A/S)
TEKNIQ (The Danish Mechanical and Electrical Contractors’ association): Allan Løvgreen (Kemp & Lauritzen A/S)
Værdibyg: Rolf Simonsen (Værdibyg), Nina Koch-Ørvad (Værdibyg), Jan Eske Schmidt (TEKNIQ – the Danish mechanical and electrical contractors’ association)
Consultant and author Rolf Simonsen (Værdibyg)
Layout: Larsendesign.dk
