Does the agent save time once someone checks its work?

The agent prepares an account brief in four minutes. The account owner spends twelve minutes checking the numbers, another six finding the source of a recommendation, and five rewriting a promise the company cannot make. The old process took thirty minutes. The four-minute headline misses the benefit.

Treat review as part of delivering the work. Ask how much human effort reaches an accepted result, who supplies it, and when it arrives. A saving spread across ten interruptions is worth less than one uninterrupted half hour.

Practitioners have asked whether human approval works in production with LangGraph. A workflow can resume correctly and still make its reviewer the busiest person in the process.

Separate effort from elapsed time#

Measure three clocks:

• Agent duration: waiting for computation.
• Human effort: time spent instructing, checking, correcting, approving, and recovering.
• Business elapsed time: when the accepted result reaches its destination.

Suppose an agent takes ten minutes while the reviewer is in meetings for three hours. It can still save labor, but it has not delivered a ten-minute service. A slower overnight task can remove morning preparation work without delaying anyone.

Use the same completion rule for the manual and assisted process. If the manual baseline ends at an approved brief, the assisted baseline must end there too. Comparing a final document with an unchecked draft credits the agent with work that somebody still has to do.

Work through the labor arithmetic#

Take twenty account briefs. Manual preparation takes thirty minutes each, or ten hours. With an agent, each brief needs three minutes of instruction, eight minutes of review, and four minutes of correction, fifteen minutes in all, or five hours. Add one hour of maintaining source material and one hour resolving two failed attempts. Net human effort is seven hours, which releases three hours.

That is a 30% reduction in this example, before software and model charges. If the reviewer is more expensive or scarcer than the original preparer, calculate the labor mix separately instead of applying a single hourly rate.

The financial value depends on what happens to the released time. Do not count a salary reduction when nobody's paid hours change. The benefit shows up as extra accounts served, faster decisions, less overtime, or room for neglected work, so record which of those occurs.

Find the review that should disappear#

Classify corrections by cause. A missing citation needs a better output requirement. A stale price needs a fix to the source. A subtle commercial judgment can stay with a person indefinitely.

Keep a correction only after deciding where it applies. A rule about one account's unusual contract should not become a default for every customer. The guide to evaluating agents provides a broader acceptance framework.

Check the result on fresh work. If the revised method lowers review time but makes reviewers less likely to notice errors, the saving is not established. Include a few known difficult cases and compare both missed defects and unnecessary corrections.

Decide what the next purchase buys#

A larger plan is justified when it removes a measured constraint. If generation is cheap and review is overloaded, buying more generation grows the queue. Better evidence presentation, narrower tasks, or a dedicated reviewer is the useful investment.

Keep the existing agent in the trial when it already does the job well. Bringing your own agent keeps the buying discussion on company knowledge and controls, with no replacement assumed. Deixic shows month-to-date model spend by agent, and the spend instructions cover that view.

End the review with one decision: expand the workflow, improve one repeated correction, or stop because accepted work costs too much effort.