AI agent investment evaluation: capacity, full cost and payback conditions

Start an agent investment decision with the work to improve, its eligible users and the result that counts as completion. Compare benefits and spending over the same period. A demonstration needs operating evidence to establish quality, use and actual cost.

Define the return being measured

Record the horizon, currency, eligible task volume, labour valuation and cost scope. Separate redeployable work capacity, spending actually removed and other independently evidenced outcomes. Released time may leave payroll unchanged; an owner needs to identify useful work that can absorb it.

The UK Government Efficiency Framework, updated November 24, 2025, distinguishes monetizable non-cash efficiency from spending reductions. Its measurement approach can inform a worksheet; it is not a Taiwan corporate accounting rule.

Fill all four cost layers

Cost shares depend on scope. An infrequent task may still merit investment because of its value per case. Frequent work can remain unsuitable for expansion because of quality or review burden.

Keep units and conditions in the calculation

When the value of time released by a quality-accepted task is defined, estimate gross work-capacity value as:

Eligible annual tasks × releasable hours per task × hourly valuation × use share × quality-pass share among used tasks.

Quality is conditional on the used-task population. If volume already contains only used, accepted tasks, do not multiply those shares again. Deduct additional review, failure handling and training once in the same model; check whether the per-task time difference already includes them.

For example, suppose full use with acceptable quality represents NT$5 million in annual work-time value. With 30% use and 80% quality acceptance among used tasks, 500 × 0.30 × 0.80 = NT$1.2 million, with amounts expressed in ten-thousand New Taiwan dollars. This is conditional gross capacity value before applicable costs, rather than cash received or removed positions. The existing work-time calculator explores gross capacity assumptions; a full investment analysis still needs cost evidence.

Separate annual return from cash payback

If annual net benefit divided by invested capital is the chosen accounting-return measure, explain its numerator, denominator and valuation convention. Annual expenses can include applicable amortization. Do not also expense the same full build outlay in that expense flow. Include adoption and change work.

Cash payback requires dated cash flows: initial payments, recurring spending, benefits that can actually be realized and their timing. An annual return percentage does not determine the payback month. Capacity value cannot simply be recorded as cash receipts.

Ask three investment questions

1. Which tasks, volumes and per-case values support the investment? Compare lower, central and higher use and quality assumptions, including model and integration limitations.
2. How will errors, review and exceptions be handled? Include takeover time, responsibility and acceptable risk in cost and acceptance criteria.
3. Who will use the workflow and track results? Confirm access, training and operating ownership, then update estimates with actual evidence.

The GAO Cost Estimating and Assessment Guide, published March 12, 2020, supports scope, assumptions, sensitivity analysis and updates with actual costs. Bring that worksheet to an agentic workflow scope discussion, and decide whether to continue, adjust or stop under agreed acceptance and operating responsibilities.