Custom MES on SQL Server Private AI Layer Blueprint Generator
This generator turns a few facts about your Custom MES on SQL Server environment into an architecture plan for a private AI layer that stays on your servers. It produces a document you can hand to IT, security and the system owner.
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Custom MES on SQL Server Private AI Layer Blueprint Generator
Private AI Layer Architecture Plan: Custom MES on SQL Server
Prepared for: Acme Precision Ltd System: Custom MES on SQL Server, SQL Server 2022 Data store: SQL Server Enterprise with readable secondary Hosting: On-prem server Named users: 250 across 1 site(s) Target go-live: 2027-03-01
1. Context and scope
Acme Precision Ltd wants an AI assistant that works on data held in Custom MES on SQL Server without moving that data off its own infrastructure. The assistant is read-only by default. Any change to a system of record is proposed by the assistant and executed only after a named person approves it, through the system's supported interface.
Main use cases: Work order status by line; scrap and downtime analysis; lot genealogy questions; draft shift handover reports; explain why a lot is on hold.
2. Components
| Component | Design for Custom MES on SQL Server | Notes |
|---|---|---|
| Data access path | Read-only SQL user on a reporting copy with an ai schema of curated views, row-level security and session context set to the end user | Read-only identity, reporting copy where possible |
| Retrieval index | Retrieval index over operator comments, quality notes, work instructions and engineering change text, refreshed through Change Data Capture | Local vector store, metadata filters mirror permissions |
| Model serving | Open-weight model served with vLLM or Ollama on None yet in On-prem server | Size from users and questions per day |
| Tool server | Tool server with fixed parameterised queries for common questions and a guarded SELECT-only tool with row limits and timeouts | Approved read actions only, parameterised |
| Identity and permissions | MES application roles mapped to row-level security policies and tool server scopes | Checked before every query and retrieval |
| Audit | Append-only log of user, question, tool calls, query text, rows returned and answer | Retained per your records policy |
3. Security controls mapped to your constraints
Data that must never leave the site: Customer-restricted part numbers, pricing and cost fields, export-controlled drawings, personal data of operators.
Hosting mode: On-prem server. All components run inside your network boundary. No model, index or log leaves it. For air-gapped hosting, model files, container images and updates enter through your controlled media process, and outbound telemetry in the serving stack is disabled.
Least privilege: a dedicated read-only service identity, no shared accounts, and per-user scope enforced in the tool server. Every answer shows its source records or query so a user can verify it.
4. Three-phase rollout
| Phase | Scope | Exit criteria |
|---|---|---|
| Phase 1: Read-only questions | Cited answers on one site or line for a pilot group | Accuracy on a known question set accepted by the system owner |
| Phase 2: Drafts | Summaries, reports and proposed records for human editing | Edit rate and error types reviewed, no policy breaches in audit |
| Phase 3: Approved actions | Writes through the supported API or interface after named approval | Approval and rollback procedure tested, audit trail complete |
5. Open questions for IT and the system owner
1. Which interface does the vendor support for read access in SQL Server 2022, and are there contractual limits on direct database reads? 2. Can we take a reporting copy of SQL Server Enterprise with readable secondary, and who owns refresh and retention? 3. Which user groups map to which scopes, and who maintains the mapping? 4. What is the approved model list and the process for bringing in model updates? 5. What logging retention and review cadence does our policy require? 6. Who is the accountable owner for answer quality after go-live?
This is a planning starting point, not a design guarantee. Confirm interface names, versions and vendor support terms with your vendor before building. The ai schema is the contract: only reviewed views are visible, columns that hold sensitive data are left out or masked, and every query runs with the end user's identity in the session context so row-level security applies. Write actions go only through the MES service layer with human approval, never through direct updates.
Architecture review of your plan
Optional: a short review of your exported blueprint by an engineer who has built private AI layers on this kind of system.
Optional. The tool and every export work without this. No spam.
How to use the generator
Fill in company name, version, data store and hosting mode, then describe the use cases and the data that must never leave the site. Choose the GPU line that matches what you have or expect to buy. The document updates as you type and exports to PDF or Word. Share the first draft with the system owner and IT security, and use the open questions section as the agenda for your next meeting. Expect to edit the components table once you learn what your vendor supports.
- Start with one site or line
- Name an owner for answer quality
- List the data that must stay on site before you pick models
- Use the exported file as the basis for a change request
Method behind the plan
The ai schema is the contract: only reviewed views are visible, columns that hold sensitive data are left out or masked, and every query runs with the end user's identity in the session context so row-level security applies. Write actions go only through the MES service layer with human approval, never through direct updates.
What the plan covers
The plan has five parts: context and scope, a component table, security controls tied to your inputs, a three-phase rollout and open questions. The rollout moves from read-only questions to drafted outputs to approved actions, with exit criteria between phases. Each component is described for Custom MES on SQL Server specifically, including the data access path and the permission model.
- Data access path and identity
- Retrieval index and tool server
- Model serving on local GPUs
- Audit log and retention
Common mistakes
Most failed pilots skip the permission model or the audit trail, then cannot get approval to widen use. Check the points below before you take the plan to a steering group.
- Pointing the assistant at the primary database and blocking production transactions with a long query.
- Using one shared SQL login so row-level security cannot reflect the person asking.
- Granting base table access instead of curated views.
Frequently Asked Questions
Does this plan require a cloud service?
No. Every component in the plan runs inside your network: the data access path, the retrieval index, the model serving on your GPUs, the tool server and the audit log. Air-gapped hosting is a supported option.
Is the assistant able to change data?
Not by default. The plan is read-only. Writes are proposed by the assistant and executed only after a named person approves, through the system's supported interface, and the audit log records the proposal and the approval.
How do I pick the GPU line?
Pick what you have or plan to buy, then check it with the sizing calculator for this system. A 24 GB class GPU suits small models and few users. More users or larger models need more memory or more GPUs.
Can I edit the document?
Yes. Edit the fields and export to Word. The component table and the open questions are the parts most worth tailoring once your vendor confirms which interfaces it supports for your version.
If you want a second pair of eyes on this plan, Netray designs and builds private, on-prem AI layers over systems like this, read-only by default.
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