Oracle PeopleSoft AI Assistant Sizing and Value Calculator
This calculator sizes an on-prem AI assistant for Oracle PeopleSoft and turns the numbers into a monthly value and a simple payback. Enter users, usage, document volume and GPU cost and read off peak load, GPU count and index size.
Your numbers
Users with a login to Oracle PeopleSoft who could use the assistant.
Share of named users who ask at least one question on a typical day. 10 to 30 percent is common after launch.
Includes retrieved context sent to the model. 2,000 to 6,000 is typical with retrieval.
For PeopleSoft, count file attachments (invoices, contracts, drawings) and shared documents you will index. Exclude HCM attachments unless approved.
Be conservative. Count only time that would otherwise be spent searching or running a report.
Hardware amortised over 36 months plus power, hosting and support for one data-centre GPU.
Aggregate batched throughput for your model and GPU. Measure it; 500 to 3,000 is a wide range.
Your results
Planning model. Peak hour share (20 percent) and 20 seconds per answer are fixed assumptions. Hours saved is the most uncertain input: measure it in a pilot before relying on the value figures. Excludes implementation, licences, staff and storage costs.
Monthly value and GPU cost vs named users
Sweeps Named users from 50 to 5000, holding your other inputs fixed.
Optional: validate these numbers in a pilot
We can run a small pilot on your hardware to measure real questions per user, tokens per answer and minutes saved for Oracle PeopleSoft.
Optional. The tool and every export work without this. No spam.
How to use it
Start with named users and the share who will ask questions on a typical day. Then estimate questions per active user and tokens per question (a retrieval-based answer often uses 2,000 to 6,000 tokens including context). Enter the number of documents and average pages to be indexed, the minutes saved per question and a loaded hourly cost. Adjust the tokens per second per GPU to match a benchmark of your own model on your own hardware.
- Use pilot data for questions per user as soon as you have it
- Keep minutes saved conservative, 2 to 5 for most lookups
- For PeopleSoft, count file attachments (invoices, contracts, drawings) and shared documents you will index. Exclude HCM attachments unless approved.
The formulas
Questions per day = users x daily active share x questions per user. Tokens per day = questions x tokens per question. Peak tokens per second = tokens per day x 0.2 / 3,600, assuming 20 percent of traffic in the busiest hour. GPUs = peak tokens per second / tokens per second per GPU, rounded up with a minimum of one. Index size = documents x pages x 1.2 chunks x 6 KB. Hours saved per month = questions per day x 22 x minutes saved / 60. Value = hours x loaded rate. Payback = 36 x monthly GPU cost / net monthly value.
Reading the result
A single GPU often covers a few hundred users because traffic is bursty and answers are short, so the GPU count is usually driven by availability and model size more than throughput. The sweep chart shows value rising linearly with users while GPU cost rises in steps, which is why value per GPU improves as you add users. If net value is negative, check whether minutes saved is realistic or whether the use cases are too narrow.
Common mistakes
People often assume every named user will ask questions daily; real adoption is lower. Others count the cheap tokens of a short question but forget the retrieved context that is sent with it. Do not forget implementation effort, staff time, licensing and storage, which this model excludes, and measure savings with a pilot rather than trusting a guess.
Frequently Asked Questions
Why only 20 percent of traffic in the busiest hour?
It is a common planning rule for office workloads, where use clusters in a few hours. If your usage is more concentrated, such as shift starts or month-end close, increase the factor by scaling questions per day or the tokens per second margin.
How do I get tokens per second per GPU?
Run your chosen model on your GPU under a serving stack such as vLLM with realistic concurrency, and record aggregate output plus input tokens per second. Published figures vary widely with model size, quantisation and batch size, so measure.
Does the model include licences and staff?
No. It covers GPU cost and time saved only. Add implementation, database licensing, storage, security review and support staff to get a full business case. Use the TCO and ROI calculators for a broader view.
What does a zero payback mean?
It means net monthly value is zero or negative with your inputs, so the hardware never pays back in this model. Raise realistic adoption or time saved, narrow the scope, or reconsider whether the use case justifies a dedicated GPU.
If you want these numbers validated against your Oracle PeopleSoft environment, Netray can run a short sizing review and a pilot on your own hardware.
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