The verdict in three sentences
For a Berlin manufacturer with 4,000 pages of technical documentation and 1,500 service tickets a month, a retrieval-based AI assistant (RAG) costs 25,000 to 60,000 EUR to set up (15,000 to 40,000 EUR in a French regional city such as Grenoble), plus 200 to 1,500 EUR a month in API and EU hosting. Built well, it resolves 30 to 45% of level 1 tickets on its own, cites the exact manual page and escalates to a technician whenever it is unsure. The real issue is not the technology but security: document segregation, EU hosting and AI Act compliance from the specification stage.
What the assistant does, and what it must not do
The assistant indexes your manuals, technical notes, service bulletins and resolved tickets. For each question, it retrieves the relevant passages then drafts an answer citing the source (document, version, page). It never answers from memory: if no relevant passage is found, it says so and opens a ticket.
| Use case | Audience | 2026 autonomous resolution rate | Safeguard |
|---|---|---|---|
| Error codes and first-level diagnosis | Customers and technicians | 50 - 65% | Mandatory citation of the manual page |
| Preventive maintenance procedures | Customers | 40 - 55% | Safety warning taken from the manual |
| Spare part compatibility | Technicians and distributors | 35 - 50% | Check against the ERP bill of materials |
| Advanced machine configuration | Internal technicians only | 20 - 35% | Role-based access |
| Complex or intermittent faults | Technicians | 5 - 15% | Automatic escalation to level 2 |
| Commercial questions (prices, lead times) | Customers | 0% | Redirect to sales |
The weighted average for a typical industrial service desk falls between 30 and 45% of level 1 tickets. Work affecting personal safety (lockout, pressure, high voltage) is always routed to the official procedure and a human.
Detailed budget: setup and running costs
| Item | 2026 range Berlin | Comment |
|---|---|---|
| Documentation audit and preparation | 5,000 - 12,000 EUR | Cleanup, versions, metadata, scanned PDFs |
| Indexing pipeline (RAG) | 7,000 - 15,000 EUR | Chunking, embeddings, automatic updates |
| Interface (customer portal, widget, Teams) | 5,000 - 13,000 EUR | Authentication, history, user feedback |
| Ticketing tool integration | 3,500 - 9,000 EUR | Zendesk, Freshdesk, ServiceNow |
| Role-based permissions | 2,500 - 6,000 EUR | Customer, distributor, internal technician |
| Evaluation and testing (300 real questions) | 2,000 - 5,000 EUR | Accuracy measured before launch |
| Total setup | 25,000 - 60,000 EUR | 8 to 14 weeks |
| LLM API + vector database + EU hosting | 200 - 1,500 EUR / month | Depends on question volume and model |
In Germany, budgets also include works council (Betriebsrat) consultation, since any tool used by technicians that logs activity may require a co-determination agreement. Plan 2 to 4 extra weeks.
Security, confidentiality and the AI Act
Your manuals contain know-how. Four rules apply. EU hosting of models and data, with a provider contractually committed not to train on your content. Role-based segregation: a customer must never receive a passage from internal documentation. Logging of questions and answers, retained 12 months for audit. AI Act transparency: since August 2026, users must be told they are interacting with an AI system. A service assistant is not a high-risk system, but technical documentation of the system and an error-correction procedure are recommended.
Mini case study
Jonas, head of service at a packaging machinery manufacturer in Berlin, receives 1,500 tickets a month, 60% of them level 1 (900 tickets). The assistant resolves 35%, or 315 tickets, each of which took 20 minutes of technician time: 105 hours a month freed up. Valued at 55 EUR an hour fully loaded, that is 5,775 EUR a month. For a 42,000 EUR project and 800 EUR monthly running costs, the net gain reaches 4,975 EUR a month and payback comes in under 9 months. Technicians move that time to billable on-site work.
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FAQ
Can the assistant invent a procedure?
The risk exists with a generic chatbot, not with a well-tuned RAG that only uses retrieved passages. On our test sets, the rate of unsourced answers falls below 2%, and they are blocked automatically.
How do we handle several versions of the same manual?
Each document is indexed with its version number and the machine models it covers. The assistant filters by the serial number entered, which avoids citing an outdated procedure.
Do we need manuals in several languages?
No, current models answer in German, English, French or Italian from documentation in a single language. Accuracy drops by 3 to 5 points, acceptable for level 1.
Which language model should we use?
We compare 2 to 3 EU-hosted models on your 300 test questions. Cost varies by a factor of 1 to 6 depending on the model, hence the 200 to 1,500 EUR monthly range.
How long before opening the assistant to customers?
Plan 4 to 6 weeks internally with technicians, then a gradual customer rollout. The usual launch threshold is 90% of answers rated correct.
Let's scope your project. Tell us your documentation volume, ticketing tool and confidentiality constraints, and we will price an assistant between 25,000 and 60,000 EUR, delivered in 8 to 14 weeks. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
