Lean Onboarding Series – Flow and Pull

Fast Kids, Slow Kids, and a Hike That Never Came Together

There is a story in Eli Goldratt’s business classic The Goal about a group of kids on a hike. The fast kids naturally moved to the front, hiking at their own comfortable pace, while the slower kids fell behind. The fast kids would get far ahead, stop and rest, and by the time the slower kids finally caught up, the fast kids were already rested and ready to move again. There was never a real, shared rhythm, just constant disconnection and regrouping.

The fix was simple: put the slowest kids at the front of the line, and have everyone else match that pace. Suddenly, the whole group moved together, genuinely connected, rather than constantly splitting apart and reforming.

The Real Pain: Everyone Going a Different Speed, All Over the Building

The real pain shows up directly on a failing project. One superintendent, taking over a struggling job in Tucson, described standing on the site for a few minutes just watching before doing anything else. Trades were scattered everywhere, on different floors, moving at completely different speeds, with the previous superintendent simply pointing at people and assigning tasks on the fly. It looked, in his own words, like a bunch of ants scrambling in every direction.

The Failure Pattern: Push, Not Pull or Flow

The failure pattern here has a name worth knowing directly: push. Push means work happening in different areas at different speeds with no regulated pace or distance between trades and crews. It produces exactly what that Tucson project experienced: trade stacking, out-of-sequence work, unsafe conditions, and, despite everyone staying busy, no real, measurable progress.

A few specific costs of a push system show up consistently, and they are worth naming directly:

• Trades end up stacked on top of each other in the same physical space, with no meaningful spacing or sequence between them.
• Work gets performed out of sequence, since there is no shared pace connecting different trades to a common rhythm.
• Genuine progress stalls even though everyone appears busy, since scattered, ungoverned activity rarely adds up to real completion.

This Isn’t Just Semantics, It’s a Real Hierarchy Worth Understanding

Pull and flow can sound like interchangeable buzzwords, but they describe genuinely distinct approaches, and understanding the real difference matters. There is an actual hierarchy worth internalizing directly: flow is the real goal, pull is a legitimate fallback when true flow is not yet achievable, and push is never acceptable under any circumstances.

What Pull Actually Means

Pull means producing only based on actual demand, never getting ahead of what is genuinely needed next. In a sequence of connected tasks or trades, pull means moving at the pace of whoever or whatever sits directly ahead of you in that sequence, the pace-setter. If the pace-setter slows down, everyone behind them adjusts and slows down too. If the pace-setter speeds up, everyone behind speeds up to match. Materials, information, labor, and equipment all get pulled to the actual point of work exactly when needed, often signaled through a visual system like Kanban that indicates when a stock of materials or supplies genuinely needs to be replenished.

What Flow Actually Means, and How It’s Different

Flow goes a meaningful step further than pull. Rather than simply adjusting reactively to whatever pace a pace-setter happens to establish, flow means deliberately regulating both the speed and the distance between every trade or crew to a consistent, intentionally designed rhythm. In a genuinely flowing project, trades move through zones or sequence areas at a steady, consistent pace, spaced a consistent distance apart, rather than adapting moment to moment to whatever pace happens to emerge organically.

The distinction matters directly: pull adapts to whatever pace exists. Flow deliberately engineers the pace itself, along with the spacing between every trade, into something steady, sustainable, and genuinely designed rather than simply reacted to.

Why It Matters: The Turnaround Story

This matters because of exactly how that Tucson story actually ended. Rather than trying to manage the existing chaos in place, the new superintendent sent everyone home, built a genuine, coherent plan and schedule from scratch, and brought the team back into a properly regulated rhythm, consistent speed, consistent distance, real sequence. That project finished on time and finished well. The owner became a genuine, enthusiastic advocate, and that same company went on to win significantly more work from that same client afterward. That outcome was not an accident of better luck. It was the direct, measurable result of moving from push toward genuine flow.

Turning This Into Daily Practice

Aim first for real flow: regulated speed and regulated distance between every trade and crew, moving through the project in a consistent, designed rhythm. If genuine flow is not yet achievable on a given project, pull is a legitimate fallback, establishing a clear pace-setter that the rest of the team adjusts around consistently. What should never be accepted, under any circumstances, is push: scattered, ungoverned work happening at different speeds all over a project with no real sequence or spacing at all.

A few practical signs help distinguish where a project actually stands on this spectrum:

• If trades are scattered with no consistent spacing or shared pace, and work is being directed ad hoc, that project is operating in push, the state to avoid entirely.
• If trades maintain consistent spacing and adjust their pace based on a clear pace-setter ahead of them, that project has genuine pull.
• If trades move at a consistent, deliberately regulated speed and consistent distance apart, without needing constant reactive adjustment, that project has achieved genuine flow.

Connecting It Back to Building People, Not Just Projects

None of this happens without leaders willing to actually design a project’s pace and sequencing deliberately, rather than assuming trades will naturally organize themselves into a workable rhythm on their own. Building genuine flow, or at minimum genuine pull, into how a project actually runs is exactly what separates projects that finish on time and build lasting client relationships from projects that scramble chaotically and lose trust along the way.

If your project needs superintendent coaching, project support, or leadership development, Elevate Construction can help your field teams build the kind of genuine flow and pull that turns scattered activity into real, measurable progress.

The Challenge

So here is the challenge worth carrying onto your next project walk: honestly assess whether your trades are moving with real, regulated flow, adjusting to a clear pull, or simply scattered in push, and take the first real step toward genuine rhythm. As Jason put it plainly, “We want flow first, and if we can’t, we at least want pull, and we never want to push.” On we go.

FAQ

What is the basic difference between flow and pull in a construction context?

Pull means adjusting your pace to match whoever or whatever is directly ahead of you in a sequence, speeding up or slowing down as needed. Flow goes further, deliberately regulating both the speed and the distance between every trade or crew into a consistent, designed rhythm, rather than simply reacting to an existing pace.

Why is “push” considered unacceptable, even though trades are technically still working?

Push means trades operate at different speeds in different areas with no regulated pace or distance between them, which leads directly to trade stacking, out-of-sequence work, and unsafe conditions. Even though everyone may appear busy, this scattered, ungoverned activity rarely produces real, measurable progress.

What does the story of the hiking kids from The Goal teach about pull systems?

Putting the fastest people at the front of a line creates constant disconnection, since slower participants fall behind and never truly move together as one group. Placing the slowest participant at the front, and having everyone else match that pace, creates a genuine, connected rhythm instead.

How does a Kanban system relate to pull in construction?

Kanban is a visual signaling system that indicates when materials, tools, or supplies at the point of work need to be replenished, ensuring resources arrive just in time rather than being stockpiled in advance. This keeps material flow tied directly to actual demand, consistent with the broader principle of pull.

Why did sending everyone home and rebuilding the schedule actually help the failing Tucson project?

The project’s problems stemmed from a complete lack of regulated pace and spacing between trades, which meant simply managing the existing chaos in place would not have solved anything. Rebuilding a genuine plan and bringing the team back into a properly regulated rhythm addressed the actual root cause, allowing the project to finish on time and rebuild the owner’s trust.