A discipline that ends with “someone should read the transcripts” has not ended anywhere at all. Someone is the least accountable word in management. So this station asks the walk’s last practical question — who, exactly, stands in the circle — and the answer transfers from Womack so cleanly it barely needs translating: line managers walk. Not staff specialists. The people accountable for the work stand in the work.
The reasoning was never mystical. The walk is how a manager learns the work they are responsible for — there is no other channel with the same bandwidth, and everything else on the manager’s desk is a summary prepared by someone with a stake in how it reads. Toyota spent fifty years dismantling the alternative: the industrial-engineering department, the staff function that studied the work on management’s behalf and delivered its findings as reports, keeping the managers comfortably upstairs and reliably wrong. Packard’s practice at HP was the same instinct at executive altitude — the whole point of walking around was to bypass the report chain and meet the frontline fact before it was formatted. Delegate the walking, and you have rebuilt the thing lean exists to tear down; you have outsourced your own eyes.
Concretely, on the fragmented gemba of Station 5, the answer has three parts.
Tech leads and engineering managers read transcripts weekly, as part of the job. Five sessions, end to end, the calendar defending the hour. Not as quality assurance, not as audit — as the successor to walking the floor they are paid to understand. A manager who has read this week’s transcripts knows where the agent thrashes, where context gets rebuilt, where their people have stopped delegating; a manager who has not is managing a rumor of the floor.
Harness owners walk constantly, because the transcripts are their voice of customer. The harness is a product; its users are developer–agent pairs; every session is a usage report. A harness rule written from theory and never traced through real sessions is inventory — work sitting between steps, value unconfirmed. The Station 5 exercise (take one rule, trace it through five transcripts, ask whether it was ever load-bearing) is not an occasional health check for these people. It is the job.
And the Center of Excellence gets exactly one walking role: teach the walk, then get out of the way. A CoE that trains managers to read transcripts, seeds the first harness reviews, and then dissolves into the line has done its work. A CoE that becomes the place where transcript-reading happens has become the industrial-engineering department with a better name — a staff function seeing on behalf of managers who no longer see. The test is blunt: if the CoE is the only one walking, the organization has already failed — failed in the precise sense that the knowledge of what is actually happening once again lives where no decision is made.
Which leaves accountability. Station 5 quoted Böckeler’s observation that the human developer works inside an implicit harness the agent lacks: “we know that our name is on the commit.” Notice what that sentence locates — accountability living in a person, socially, not in the machinery around them. No harness rule signs a commit. No dashboard has ever stood in front of a customer, or a regulator, or a postmortem, and answered for what shipped. The harness can shape the work and the metrics can summarize it, but when something must be answered for, the answering is done by a person — and the only person who can answer honestly for work is one who has actually stood in it.
That is the real reason the walker must be the line manager and not a delegate: accountability without observation is signature without knowledge. An organization whose managers sign for work they have never watched happen is running on borrowed sight, and the loan gets called at the worst possible moment.
One station remains. So far the argument has stayed politely inside software development. The last stretch of the street asks what happens when it stops staying there.