Define the task and baseline
Choose a repeatable task with a known input, output and reviewer. Record how it is completed today and which quality failures matter. Use equivalent tasks for comparison so one attempt is not easier than the other. If a baseline does not exist, say so and collect one before making a savings claim. A workshop can establish a measurement method without promising an immediate business result.
Assess capability directly
Ask participants to complete a task independently and explain the checks they performed. Include missing information or a contradiction so the assessment tests judgment rather than prompt copying. Keep the rubric short enough for consistent review: source accuracy, completeness, handling of unknowns and appropriate ownership. A learner who stops and asks a valid question may demonstrate better capability than one who produces an unsupported answer quickly.
Count the whole effort
Measure source preparation, prompting, review, correction and handover, not only the time until the first response appears. For a small pilot, record observations rather than extrapolating them across the workforce. Differences in task difficulty, reviewer experience and tool access can affect results. Report the sample size and measurement period with any figures so readers understand what the comparison can and cannot establish.
Check transfer after the workshop
A manager can review one approved task in the following week and ask what the learner changed or rejected. Track whether a useful method is repeated and whether recurring errors decline. Adoption is more meaningful when connected to an appropriate workflow than when measured as raw tool usage. High activity with poor source checking is not a successful outcome.
Use evidence to decide the next step
Expand the learning path when the cohort demonstrates quality and the workflow owner can support continued practice. Revise the task if correction effort is high or permissions remain unclear. Keep unresolved issues visible and avoid converting a small learning exercise into a claimed return on investment. Financial ROI needs its own cost assumptions, attribution and review beyond a training attendance report.