https://ki-xellenz.com/en/knowledge/ Articles on AI-supported processes in design, construction and existing buildings (Germany). en-GB Sun, 08 Nov 2026 12:00:00 GMT https://ki-xellenz.com/en/knowledge/local-language-models-own-ai-server/ https://ki-xellenz.com/en/knowledge/local-language-models-own-ai-server/ Sun, 08 Nov 2026 12:00:00 GMT Data protection and rules What your own AI server in the office can do, where it falls behind large cloud models, and what it costs in the first year in an example calculation. https://ki-xellenz.com/en/knowledge/e-invoice-receipt-construction-company/ https://ki-xellenz.com/en/knowledge/e-invoice-receipt-construction-company/ Sat, 07 Nov 2026 12:00:00 GMT E-invoicing How an e-invoice gets from the mailbox to the archive via allocation to the building project and site management approval, and who clarifies what. https://ki-xellenz.com/en/knowledge/cost-estimate-din-276-benchmark-figures/ https://ki-xellenz.com/en/knowledge/cost-estimate-din-276-benchmark-figures/ Sun, 01 Nov 2026 12:00:00 GMT Costs and bills of quantities How a DIN 276 cost estimate is built from your own benchmark figures: cost groups, price level, construction price index, assumptions list and range. https://ki-xellenz.com/en/knowledge/interim-invoice-e-invoice-construction/ https://ki-xellenz.com/en/knowledge/interim-invoice-e-invoice-construction/ Sat, 31 Oct 2026 12:00:00 GMT E-invoicing What the BMF letters say on interim invoices, final accounts, the bill of quantities and site measurement as an attachment, and the relief until 2030. https://ki-xellenz.com/en/knowledge/ai-gdpr-office-three-options/ https://ki-xellenz.com/en/knowledge/ai-gdpr-office-three-options/ Sun, 25 Oct 2026 12:00:00 GMT Data protection and rules Cloud in the EU, a German provider or your own server: what data processing agreements, place of processing and training mean, and what risk remains. https://ki-xellenz.com/en/knowledge/xrechnung-zugferd-data-set/ https://ki-xellenz.com/en/knowledge/xrechnung-zugferd-data-set/ Sat, 24 Oct 2026 12:00:00 GMT E-invoicing XRechnung is an XML file, ZUGFeRD a PDF with embedded XML. What the data set contains, what validation checks and how to view it for free. https://ki-xellenz.com/en/knowledge/check-bill-of-quantities-errors/ https://ki-xellenz.com/en/knowledge/check-bill-of-quantities-errors/ Sun, 18 Oct 2026 12:00:00 GMT Costs and bills of quantities Common errors in a bill of quantities and what an AI-assisted check finds: notes rather than an expert opinion, with calculation done in a fixed program. https://ki-xellenz.com/en/knowledge/e-invoice-deadlines-construction/ https://ki-xellenz.com/en/knowledge/e-invoice-deadlines-construction/ Sat, 17 Oct 2026 12:00:00 GMT E-invoicing You must be able to receive e-invoices since 2025 and issue them from 2027 or 2028. Which deadline applies and why a PDF by email is not enough. https://ki-xellenz.com/en/knowledge/retain-e-invoices-archive/ https://ki-xellenz.com/en/knowledge/retain-e-invoices-archive/ Sun, 11 Oct 2026 12:00:00 GMT E-invoicing The data set is the original: what to archive for e-invoices, for how long, what the GoBD require and how to assign invoices to a building project. https://ki-xellenz.com/en/knowledge/issue-e-invoices-design-practice/ https://ki-xellenz.com/en/knowledge/issue-e-invoices-design-practice/ Sat, 10 Oct 2026 12:00:00 GMT E-invoicing What design practices and small firms should settle before the deadline: routes to an e-invoice, master data, fee and interim invoices, test run, sign-off. https://ki-xellenz.com/en/knowledge/introduce-ai-small-office-90-days/ https://ki-xellenz.com/en/knowledge/introduce-ai-small-office-90-days/ Sun, 04 Oct 2026 12:00:00 GMT Getting started Introducing AI in a small office in 90 days: measure first, then pilot one construction process with a contact person, training per role and re-measuring. https://ki-xellenz.com/en/knowledge/is-ai-worth-it-small-office-calculation/ https://ki-xellenz.com/en/knowledge/is-ai-worth-it-small-office-calculation/ Sat, 03 Oct 2026 12:00:00 GMT Getting started Is AI worth it in a small office? Costs set against hours gained, with invented example data, open assumptions and the checking time included. https://ki-xellenz.com/en/knowledge/ai-act-deadlines-for-offices/ https://ki-xellenz.com/en/knowledge/ai-act-deadlines-for-offices/ Sun, 27 Sep 2026 12:00:00 GMT Data protection and rules Which stages of the EU AI Act affect an office that only uses AI: AI literacy, transparency and high risk, with the status of the Digital Omnibus. https://ki-xellenz.com/en/knowledge/prepare-acceptance-defects-list-minutes/ https://ki-xellenz.com/en/knowledge/prepare-acceptance-defects-list-minutes/ Sat, 26 Sep 2026 12:00:00 GMT Minutes and reports Preparing acceptance in a building firm: what to assemble before the date, how defects are recorded by voice and photo, and what the minutes record. https://ki-xellenz.com/en/knowledge/searchable-building-file-asset-management/ https://ki-xellenz.com/en/knowledge/searchable-building-file-asset-management/ Sun, 20 Sep 2026 12:00:00 GMT Knowledge base Find maintenance contracts, inspection reports and as-built records with a source reference, prepare a deadline list. What stays out, such as tenant data. https://ki-xellenz.com/en/knowledge/check-construction-variations-boq-contract/ https://ki-xellenz.com/en/knowledge/check-construction-variations-boq-contract/ Sat, 19 Sep 2026 12:00:00 GMT Costs and bills of quantities Checking a variation means comparing it with the bill of quantities and the contract. How a deviation list prepares the check and what stays with you. https://ki-xellenz.com/en/knowledge/project-mailbox-sort-emails-ai/ https://ki-xellenz.com/en/knowledge/project-mailbox-sort-emails-ai/ Sun, 13 Sep 2026 12:00:00 GMT Minutes and reports What an AI can prepare in a project mailbox: classify, summarise threads, draft replies. And what you should not let happen automatically. https://ki-xellenz.com/en/knowledge/cost-monitoring-din-276-overview/ https://ki-xellenz.com/en/knowledge/cost-monitoring-din-276-overview/ Sat, 12 Sep 2026 12:00:00 GMT Costs and bills of quantities Cost monitoring under DIN 276: budget, orders, variations and forecast per cost group in one overview. Who calculates, who matches and who decides. https://ki-xellenz.com/en/knowledge/contract-deadlines-obligations-list-ai/ https://ki-xellenz.com/en/knowledge/contract-deadlines-obligations-list-ai/ Sun, 06 Sep 2026 12:00:00 GMT Knowledge base A list of deadlines and duties with source references from a design or construction contract: what AI finds, what stays with you, how sampling helps. https://ki-xellenz.com/en/knowledge/shadow-ai-private-chat-services/ https://ki-xellenz.com/en/knowledge/shadow-ai-private-chat-services/ Sat, 05 Sep 2026 12:00:00 GMT Data protection and rules What shadow AI is, how widespread it is per Bitkom and the IW, which risks it poses for project data and what a company can offer instead of a ban. https://ki-xellenz.com/en/knowledge/knowledge-loss-old-projects-reference-library/ https://ki-xellenz.com/en/knowledge/knowledge-loss-old-projects-reference-library/ Sun, 30 Aug 2026 12:00:00 GMT Knowledge base Preventing knowledge loss in construction: which old-project records suit a searchable reference library, which do not, and what retention periods mean. https://ki-xellenz.com/en/knowledge/delay-and-concern-notices-prepare/ https://ki-xellenz.com/en/knowledge/delay-and-concern-notices-prepare/ Sat, 29 Aug 2026 12:00:00 GMT Minutes and reports Preparing a delay notice and a notice of concerns in a building firm: what sections 6 and 4 VOB/B provide and how AI drafts from your records. https://ki-xellenz.com/en/knowledge/check-interim-payment-application-boq-measurement/ https://ki-xellenz.com/en/knowledge/check-interim-payment-application-boq-measurement/ Sun, 23 Aug 2026 12:00:00 GMT Costs and bills of quantities Checking an interim payment application means comparing invoice, BoQ and measurement. A deviation list with source references prepares it. https://ki-xellenz.com/en/knowledge/monthly-client-report-project-management-ai/ https://ki-xellenz.com/en/knowledge/monthly-client-report-project-management-ai/ Sat, 22 Aug 2026 12:00:00 GMT Minutes and reports Prepare the monthly report to the client with AI: structure, sources per chapter, checking steps and what stays with the project lead. https://ki-xellenz.com/en/knowledge/ai-training-by-role-office/ https://ki-xellenz.com/en/knowledge/ai-training-by-role-office/ Sun, 16 Aug 2026 12:00:00 GMT Getting started What managing directors, project leads, site managers and office assistants should know about AI: content by role, exercises, duration, record. https://ki-xellenz.com/en/knowledge/ai-policy-for-company-office/ https://ki-xellenz.com/en/knowledge/ai-policy-for-company-office/ Sat, 15 Aug 2026 12:00:00 GMT Data protection and rules An AI policy for the office in five steps: approve tools, classify data, check results, label use, train staff. With the current position on Art. 4 AI Act. https://ki-xellenz.com/en/knowledge/ai-answers-source-reference/ https://ki-xellenz.com/en/knowledge/ai-answers-source-reference/ Sun, 09 Aug 2026 12:00:00 GMT Knowledge base Language models invent answers when they guess. How source references, spot checks and review steps keep wrong statements out of your contracts. https://ki-xellenz.com/en/knowledge/price-comparison-tenders-side-by-side/ https://ki-xellenz.com/en/knowledge/price-comparison-tenders-side-by-side/ Sat, 08 Aug 2026 12:00:00 GMT Costs and bills of quantities Preparing a price comparison: a fixed program checks sums and compares prices, the AI flags text anomalies, and the assessment stays with you. https://ki-xellenz.com/en/knowledge/data-processing-agreement-ai-services/ https://ki-xellenz.com/en/knowledge/data-processing-agreement-ai-services/ Sun, 02 Aug 2026 12:00:00 GMT Data protection and rules Using a cloud AI service usually calls for a contract under Art. 28 GDPR. What to look for in it, plus a list of questions to put to the provider. https://ki-xellenz.com/en/knowledge/site-diary-defects-voice-photo/ https://ki-xellenz.com/en/knowledge/site-diary-defects-voice-photo/ Sat, 01 Aug 2026 12:00:00 GMT Minutes and reports Record the site diary and defects list on site by voice note and photo, check in the evening instead of typing. What the AI prepares, what stays with you. https://ki-xellenz.com/en/knowledge/gaeb-file-exchange-phases-explained/ https://ki-xellenz.com/en/knowledge/gaeb-file-exchange-phases-explained/ Sun, 26 Jul 2026 12:00:00 GMT Costs and bills of quantities What a GAEB file contains, what the exchange phases X81, X83, X84 and X86 mean, and why structured data makes checking bills of quantities easier. https://ki-xellenz.com/en/knowledge/ocr-old-plans-poor-scans/ https://ki-xellenz.com/en/knowledge/ocr-old-plans-poor-scans/ Sat, 25 Jul 2026 12:00:00 GMT Knowledge base What OCR achieves on scans: my own invoice test (99.85 per cent against 64.2 per cent) and limits with handwriting, title blocks, tables, dimension chains. https://ki-xellenz.com/en/knowledge/open-items-list-from-meeting-minutes/ https://ki-xellenz.com/en/knowledge/open-items-list-from-meeting-minutes/ Sun, 19 Jul 2026 12:00:00 GMT Minutes and reports How meeting minutes become a list of open items with owner and date, what the AI proposes and what the project lead confirms. https://ki-xellenz.com/en/knowledge/recording-meetings-consent-gdpr/ https://ki-xellenz.com/en/knowledge/recording-meetings-consent-gdpr/ Sat, 18 Jul 2026 12:00:00 GMT Data protection and rules Recording meetings for AI minutes: consent of all, section 201 StGB, GDPR, notice in the invitation, deletion period and works council at a glance. https://ki-xellenz.com/en/knowledge/writing-ai-work-instructions-prompts/ https://ki-xellenz.com/en/knowledge/writing-ai-work-instructions-prompts/ Sun, 12 Jul 2026 12:00:00 GMT Getting started How to give an AI a work instruction: role, documents, task, form and a check step, with one running example and the typical mistakes to avoid. https://ki-xellenz.com/en/knowledge/project-folder-structure-file-names/ https://ki-xellenz.com/en/knowledge/project-folder-structure-file-names/ Sat, 11 Jul 2026 12:00:00 GMT Knowledge base Consistent folders, file names with date and drawing revision, clear versions: why search and an AI knowledge base depend on them and how to begin. https://ki-xellenz.com/en/knowledge/searchable-project-files-knowledge-base/ https://ki-xellenz.com/en/knowledge/searchable-project-files-knowledge-base/ Sun, 05 Jul 2026 12:00:00 GMT Knowledge base How an AI knowledge base searches your project documents: find passages first, then answer with a source. And why order comes before technology. https://ki-xellenz.com/en/knowledge/meeting-minutes-with-ai/ https://ki-xellenz.com/en/knowledge/meeting-minutes-with-ai/ Sat, 04 Jul 2026 12:00:00 GMT Minutes and reports How a recording becomes signed-off minutes, where AI saves time, where it does not, and why responsibility stays with the person who writes them. https://ki-xellenz.com/en/knowledge/measure-office-workflows-before-ai/ https://ki-xellenz.com/en/knowledge/measure-office-workflows-before-ai/ Sun, 28 Jun 2026 12:00:00 GMT Getting started Where the time goes in an office shows after one week of logging: frequency times minutes per workflow. How to spot a workflow that suits AI. https://ki-xellenz.com/en/knowledge/what-language-models-can-and-cannot-do/ https://ki-xellenz.com/en/knowledge/what-language-models-can-and-cannot-do/ Sat, 27 Jun 2026 12:00:00 GMT Getting started A language model reads, sorts and drafts text, but it does not calculate reliably and can invent facts. What that means for who does what. https://ki-xellenz.com/en/knowledge/mcp-ai-agents-explained/ https://ki-xellenz.com/en/knowledge/mcp-ai-agents-explained/ Sun, 21 Jun 2026 12:00:00 GMT Automation An AI agent chooses its own steps, and MCP is the standard for its tools. What an agent may do in a small business and what needs approval first. https://ki-xellenz.com/en/knowledge/e-invoice-trades-intake-automation/ https://ki-xellenz.com/en/knowledge/e-invoice-trades-intake-automation/ Sat, 20 Jun 2026 12:00:00 GMT Automation Trades businesses have had to receive e-invoices since 2025. How intake, checking, matching and filing can run as a workflow, and what people still decide. https://ki-xellenz.com/en/knowledge/knowledge-assistant-local-or-eu-cloud/ https://ki-xellenz.com/en/knowledge/knowledge-assistant-local-or-eu-cloud/ Sun, 14 Jun 2026 12:00:00 GMT Automation A knowledge assistant answers questions from your own documents and names the source. What vendors say about local and EU-cloud processing. https://ki-xellenz.com/en/knowledge/quote-follow-up-appointment-requests/ https://ki-xellenz.com/en/knowledge/quote-follow-up-appointment-requests/ Sat, 13 Jun 2026 12:00:00 GMT Automation Following up quotes and appointment requests in a trades office: a workflow with a list and a draft, section 7 UWG in its wording, and a worked example. https://ki-xellenz.com/en/knowledge/automation-project-cost-germany/ https://ki-xellenz.com/en/knowledge/automation-project-cost-germany/ Sun, 07 Jun 2026 12:00:00 GMT Automation What does an automation project cost? Published fixed prices and day rates with source and date, November 2026, plus cost types and funding. https://ki-xellenz.com/en/knowledge/automation-handover-documentation-checklist/ https://ki-xellenz.com/en/knowledge/automation-handover-documentation-checklist/ Sat, 06 Jun 2026 12:00:00 GMT Automation What a business must own after an automation project: workflows, access, key and documentation, based on n8n docs and the BSI, with a checklist. https://ki-xellenz.com/en/knowledge/ai-texts-people-like-to-read/ https://ki-xellenz.com/en/knowledge/ai-texts-people-like-to-read/ Sun, 31 May 2026 12:00:00 GMT Minutes and reports How to use AI for minutes, reports and emails that people enjoy reading: write the brief, cut the draft, name who does what by when and read it aloud. https://ki-xellenz.com/en/knowledge/n8n-updates-backups-who-is-responsible/ https://ki-xellenz.com/en/knowledge/n8n-updates-backups-who-is-responsible/ Sat, 30 May 2026 12:00:00 GMT Automation Who updates n8n and backs up the credentials? Security advisories read at the source, what a complete backup contains, and a simple rule to adopt. https://ki-xellenz.com/en/knowledge/automation-silent-failures-monitoring/ https://ki-xellenz.com/en/knowledge/automation-silent-failures-monitoring/ Sun, 24 May 2026 12:00:00 GMT Automation How a business notices that an automated workflow has failed: error alert, sign of life, count check, and the question of who reads it. https://ki-xellenz.com/en/knowledge/data-zones-which-data-which-tool/ https://ki-xellenz.com/en/knowledge/data-zones-which-data-which-tool/ Sat, 23 May 2026 12:00:00 GMT Automation Data zones for automation: which data may go into which tool, when Article 28 GDPR requires a contract, and what the n8n contract does not cover. https://ki-xellenz.com/en/knowledge/enquiries-inbox-trades-office/ https://ki-xellenz.com/en/knowledge/enquiries-inbox-trades-office/ Sun, 17 May 2026 12:00:00 GMT Automation Sort enquiries from form, email and phone note in advance: what a workflow takes over, what the office decides and why emails are untrusted text. https://ki-xellenz.com/en/knowledge/workflow-ai-step-human-approval/ https://ki-xellenz.com/en/knowledge/workflow-ai-step-human-approval/ Sat, 16 May 2026 12:00:00 GMT Automation How do you keep AI under control in an automated process? A fixed workflow, a single AI step and human approval: the pattern, with an invented example. https://ki-xellenz.com/en/knowledge/n8n-licence-what-is-allowed/ https://ki-xellenz.com/en/knowledge/n8n-licence-what-is-allowed/ Sun, 10 May 2026 12:00:00 GMT Automation The n8n licence against its wording: what a business and a service provider may do with self-hosted n8n, what the vendor FAQ says and what stays open. https://ki-xellenz.com/en/knowledge/automation-cloud-or-self-hosted-cost/ https://ki-xellenz.com/en/knowledge/automation-cloud-or-self-hosted-cost/ Sat, 09 May 2026 12:00:00 GMT Automation Run automation in the cloud or host it yourself? Prices of n8n, Zapier, Make and Power Automate with date, billing units and the effort of running it. https://ki-xellenz.com/en/knowledge/incoming-invoice-time-per-invoice/ https://ki-xellenz.com/en/knowledge/incoming-invoice-time-per-invoice/ Sun, 03 May 2026 12:00:00 GMT Automation An incoming invoice takes 6 to 9 minutes to book, says an IW survey. Why capturing it saves little and where the real lever lies in checking the invoice. https://ki-xellenz.com/en/knowledge/skilled-trades-ai-state/ https://ki-xellenz.com/en/knowledge/skilled-trades-ai-state/ Sat, 02 May 2026 12:00:00 GMT Automation AI in the German skilled trades per Bitkom 2025: 4 per cent use it, 85 per cent offer digital services. What the figures measure and what follows. https://ki-xellenz.com/en/knowledge/measure-time-savings/ https://ki-xellenz.com/en/knowledge/measure-time-savings/ Sun, 26 Apr 2026 12:00:00 GMT Automation How much time does automation really save? Calculate cases times minutes, measure before and after, and read two studies correctly. https://ki-xellenz.com/en/knowledge/bureaucracy-working-time-figures/ https://ki-xellenz.com/en/knowledge/bureaucracy-working-time-figures/ Sat, 25 Apr 2026 12:00:00 GMT Automation Depending on the study, red tape eats 3, 7 or 23 percent of working time. What KfW and IW each asked, and why the figures should not be mixed. https://ki-xellenz.com/en/knowledge/when-not-to-automate/ https://ki-xellenz.com/en/knowledge/when-not-to-automate/ Sun, 19 Apr 2026 12:00:00 GMT Automation Rare, judgement-based or legally sensitive tasks, and tasks full of exceptions, are better left to people. With a worked calculation and check questions. https://ki-xellenz.com/en/knowledge/process-automation-small-business-basics/ https://ki-xellenz.com/en/knowledge/process-automation-small-business-basics/ Sat, 18 Apr 2026 12:00:00 GMT Automation What process automation means in a small business: trigger, steps and connections, four tools described neutrally, and how to recognise a suitable process.