When a hire goes wrong, the post-mortem almost always lands on the person. Bad interview. Bad fit. A candidate who interviewed well and worked out poorly. I've sat in enough of those debriefs to know the conclusion is comfortable precisely because it points away from the leader. But the more I watch hiring fail inside construction firms, the more convinced I am that the person was rarely the variable. The system the leader built around that person was. The quality of a hire is principally driven by the leader, and the leader's first responsibility is the system, not the candidate.

There's a tool that makes this hard to unsee: the Six Boxes Model, developed by Thomas F. Gilbert. It reframes performance as a systems problem rather than a people problem, and it is one of the most overlooked leadership frameworks in construction today. If you're a hiring authority frustrated by inconsistent team performance and unpredictable hiring outcomes, it will change where you look first.

Gilbert's Six Boxes

Gilbert sorted the factors that drive performance into two buckets. The split is the whole point.

Environmental factors account for roughly 75% of performance issues:

  • Information, Are expectations and feedback clear?
  • Resources, Do people have the tools they need?
  • Incentives, Are there consequences or rewards that actually matter?

Individual factors account for the other 25%:

  • Knowledge and skills, Have they been properly trained?
  • Capacity, Are they personally capable of the work?
  • Motivation, Do they care about doing it well?

Three-quarters of underperformance traces to the environment. Yet most leaders instinctively reach to fix the person. That reflex is not just ineffective. It's expensive, because it spends money and goodwill on the wrong quarter of the problem.

Why the model holds up

Gilbert was a behavioral psychologist and performance engineer, often called the father of Human Performance Technology. A protégé of B.F. Skinner, he applied behavioral science to practical workplace problems and, in 1978, published Human Competence, a book that reshaped how organizations think about performance.

He built the model through behavioral analysis across industries including construction, education, government, and manufacturing; through cost-benefit modeling of different interventions; and through real-world diagnostics that isolated whether failure came from the system or the individual.

If you want people to perform, you must engineer the environment in which they perform., T.F. Gilbert

The weightings inside the model, Information at 35% and Resources at 26%, aren't a thought experiment. They come from decades of applied data showing that environmental fixes carry the highest return when you're trying to improve performance.

What the boxes mean for hiring

If you want hiring and team performance to improve, stop treating a hire as a one-off decision and start designing a repeatable system. This is how each box maps onto the way a firm actually hires.

Information (35%)

"I would perform better with clear expectations, feedback, and access to information." Are your interviewers aligned on what good looks like? Are candidates clear on the role and the path to success in it? Is there a feedback loop after every interview, or does it evaporate?

The fix: build structured interview strategies tied to real role outcomes, debrief consistently, and equip the people interviewing with prep materials and a decision framework.

Resources (26%)

"I would perform better with the right tools." Most interviewers are set up to fail. They're handed a resume and a calendar invite, with no guide, no tools, no context.

The fix: give them interview guides, feedback forms, and role scorecards. Hand over prior hiring data or assessment insight so the conversation can be rigorous instead of improvised.

Incentives (14%)

"I would perform better if the consequences or rewards were real." Hiring well is rarely incentivized. When no one owns the quality of a hire, it becomes a shared blind spot, and shared blind spots are nobody's emergency.

The fix: make hiring quality visible. Celebrate the great hires out loud. Examine the bad ones honestly. Build hiring outcomes into the performance reviews of the managers who own them.

Knowledge (11%)

"I would perform better with training." Interviewing gets treated like an instinct, but it's a learned skill. Untrained interviewers default to vague impressions and gut reactions, which is exactly how a confident hire becomes a costly one.

The fix: train your people on structured interviewing, behavioral questioning, and candidate assessment. Treat it as a core leadership skill, not a soft one.

Capacity (8%)

"I would perform better if my own capabilities matched the job." Some team members aren't suited to interviewing, whether from bandwidth, communication style, or genuine discomfort evaluating other people.

The fix: be deliberate about who interviews. Don't overload your best performers by default, and protect the time it takes to prepare and evaluate well.

Motivation (6%)

"I would perform better if I actually cared." Hiring can feel like a chore, or worse, a risk to be dodged. If your team doesn't see it as vital, they'll treat it as a side task.

The fix: connect hiring to the mission. Show how the right person lifts the whole crew. Make it a point of pride rather than a burden to survive.

Fix the system, not the person

Gilbert's model holds a mirror up to the leader: performance is predictable once you're willing to examine the full system. Hiring is no different. If you keep getting mediocre results, the cause usually isn't bad luck or people "not being what they used to be." It's an environment you designed and can redesign.

That's the part worth sitting with. The seventy-five percent of the problem that lives in the environment is the seventy-five percent you control.

You can't outsource the system to the candidates. You built it, which means you're the one who can rebuild it.