Contracts vs Trust: Finding the Sweet Spot in Construction Project Delivery.

In most cases, success in construction can’t be measured by the finished build, the budget or the awards. A successful project is one where people continue to work well together under pressure. At the 2025 Civil Contractors New Zealand Conference, Stuart Bailey introduced a framework to capture this truth: the Contracts vs Trust matrix – unofficially known as the Bailey Theory. 

Why Contracts and Trust Matter Together 

Too often, contracts and trust are treated as mutually exclusive. In reality, they are not competing forces, but interdependent ones. The Bailey Theory shows how projects thrive only when both the contract and trust between stakeholders are strong. 

• High Trust + High Contract Quality: This is the sweet spot. Clear contracts, properly administered, combined with genuine trust between client and contractor teams. Projects move forward smoothly, risks are managed, and value is delivered to communities. 
• High Trust + Low Contract Quality: At first, it feels easy. Strong relationships mask weak documentation. But when disputes arise, scope changes, or quality issues emerge, trust begins to slip.   
• Low Trust + High Contract Quality: Projects can still be delivered. Well-written contracts carry the load, but progress is adversarial, and relationships suffer. 
• Low Trust + Low Contract Quality: The danger zone. No safeguards, no collaboration. Projects stall, costs escalate, and reputations are damaged.
  
   

“Well-written contracts on their own are not enough, and trust on its own will not hold when pressure comes on. Projects are most resilient when strong contracts are matched with genuine trust between client and contractor teams.”
– Stuart Bailey 

How Projects Drift Across the Matrix 

The matrix is not static. Projects can move between quadrants as circumstances change. When trust is high, it is tempting for teams to ease off on contract administration. 

Over time, weak documentation undermines delivery, and the very trust that once carried the project begins to fracture. Once the project drifts into the low-contract space, disputes and frustrations erode trust further, pulling it toward the danger zone. The only way to restore stability is to re-establish strong contract administration, which gradually rebuilds confidence and allows trust to grow again. 

This dynamic nature of the matrix is a reminder that leaders must actively maintain both trust and contract quality throughout the life of a project. Neglecting either dimension will inevitably push a project off balance. 

Why Contracts Alone Cannot Carry a Project 

Strong contracts can keep a project moving even when trust is low, but this approach comes at a cost. The work becomes transactional, dominated by claims, disputes, and formal processes rather than collaboration. Projects delivered in this environment may meet their technical objectives, but inefficiency increases, reputations suffer, and the spirit of partnership is lost. It delivers outputs, but not always the outcomes that communities deserve. 

Why Trust Without Contracts Will Break Down 

Trust is equally fragile when it stands alone. Handshake agreements and goodwill can work in small projects, but at scale, they fail time and time again. Costs rise, scope shifts, and deadlines slip. Without robust documentation, trust erodes under pressure. 

The lesson is clear: trust must be underpinned by contracts, just as contracts must be supported by trust. 

The Industry’s Challenge in Aotearoa 

With the release of NZS 3910:2023, New Zealand now has a refreshed standard form contract designed to strengthen governance and reduce the need for extensive special conditions. Yet the Bailey Theory reminds us that contracts and standards are only part of the picture. Too many projects still lean heavily in one direction – either on rigid documentation or on informal trust. Neither approach is sustainable. Resilient delivery requires both. 

Where EQ Training Fits 

The Bailey Theory also highlights something many technical professionals overlook: contracts are managed by people. People bring politics, pressure, personalities and unconscious bias to every conversation, which is why contract administration is as much about managing relationships as it is about managing clauses. 

This is why we are working on a new EQ (Emotional Intelligence) training module in 2026. The programme will focus on building stronger working relationships, equipping professionals to handle difficult conversations about money and time, and supporting them to negotiate with integrity while meeting contractual obligations. It will also provide tools for managing conflict and maintaining respect under pressure. These skills are not optional extras. They directly influence contract compliance, dispute resolution, and stakeholder confidence. 

They are what help keep projects in the high-trust, high-contract quadrant. 

How Seven Rivers Applies the Bailey Theory 

At Seven Rivers, we work to keep projects in the sweet spot. That means ensuring contracts are structured and administered clearly, in line with NZS 3910:2023 and the Construction Contracts Act. It means supporting project teams to build trust through open communication, collaborative problem-solving, and ethical leadership. And it means training leaders not only in the technical aspects of contract admin, but also in the interpersonal skills required to navigate complex relationships under pressure. 

A Call to Lift Standards 

To deliver infrastructure that lasts, and partnerships that endure, we must insist on both clear contracts and genuine trust. 

Seven Rivers is committed to helping project leaders across New Zealand achieve this balance. Through training, mentoring, and independent project leadership, we help guide teams to the sweet spot where collaboration is backed by clarity. 

If you want to equip your team with the tools to thrive in both contract administration and relationship management, talk to us about our upcoming EQ training and NZS 3910 programmes. 

Call us on 0800 7Rivers or email us at admin@sevenrivers.co.nz. 

Where does your team sit?

Strong contracts and strong relationships do not happen by accident. They are built through clear processes, confident communication and a shared understanding of how NZS 3910 works in practice.

Take our quick NZS 3910 Team Confidence Check to see whether your team is contract-ready, needs a refresher, or could benefit from practical training.

Complete the NZS 3910 Confidence Check here.