Custom AI
Custom AI Development
We build AI that understands your operations and data and works in practice inside your organization.
Every organization has a different data structure, business process, security policy, and reason for adopting AI. YEJIN does not simply supply off-the-shelf solutions; we analyze the requirements of enterprises and institutions and design AI models, internal data, business systems, and specialized agents as a single architecture.
We combine AI Orchestration, RAG Knowledge Retrieval, data analysis and forecasting, Workflow Automation, and On-Premises and sLM technologies with automated estimation, drawing and design support, 2D, 3D, and VR simulation, digital mockups, and industry-specific video generation to build custom AI systems optimized for each organization and industry.
- Requirement-based AI design
- Internal data and business system integration
- Custom RAG Knowledge Retrieval
- AI Agents and Workflow Automation
- Automated estimation and cost calculation
- Drawing and design support
- 2D, 3D, and VR simulation
- Digital mockups and video generation
- On-Premises and sLM deployment
Why Custom AI
General-purpose AI alone struggles to complete an organization’s real work
General-purpose generative AI is useful for common questions and document drafting, but it does not know an enterprise's internal data, business rules, approval procedures, or existing systems. Applying it to real work requires a dedicated AI design that understands the organization's data and processes and accounts for security and permission structures.
It does not understand internal data
General-purpose AI does not know the documents, rules, customer information, and operational data an enterprise holds, so it struggles to deliver results that meet the organization's standards.
It does not connect to business processes
It can search for information and answer questions, but it cannot automatically carry out follow-up work such as review, approval, reporting, and system entry.
Requirements differ across organizations
Even within the same industry, data structures, systems, workflows, and security levels differ, so a standardized AI solution cannot be applied as-is.
Security and permission controls are required
The data and AI functions a user can access must be differentiated by their role, department, and scope of work.
Continuous improvement is required
AI is not a system that is built once and finished; it must continuously reflect new data, policy changes, and user feedback.
Performance measurement is required
Beyond simply adopting AI, you must be able to measure the impact through metrics such as work time, accuracy, throughput, and user satisfaction.
Scope
We design the AI system you need to fit your organization and industry
AI Chatbot and Support Systems
We build custom conversational AI that answers questions from customers, employees, or the public based on internal data and business standards.
RAG Knowledge Retrieval System
We vectorize internal documents, rules, manuals, reports, and databases to retrieve information that matches the meaning and context of a question.
Document Intelligence
We classify, summarize, and compare contracts, proposals, reports, applications, and other business documents, and extract key information and risk factors.
AI Agents and Workflow Automation
We build task-specialized AI agents that carry out information gathering, analysis, drafting, review, reporting, and follow-up work step by step.
Data Analysis and Forecasting Pipeline
We analyze structured and unstructured data together to forecast demand, sales, inventory, quality, operational risk, and changes in key indicators.
Automated Estimation and Cost Calculation AI
We analyze drawings, materials, quantities, specifications, work processes, and unit-price data for construction, interior, industrial facility, manufacturing, and maintenance projects to support quotations and cost calculation.
Drawing and Design Support AI
We support floor plan composition, layout options, concept drawings, design drafts, and drawing review based on requirements, spatial information, specifications, and design standards.
2D, 3D, and VR Simulation
Based on design plans and spatial information, we generate 2D layouts, 3D models, virtual spaces, and VR simulations to help review outcomes before construction or fabrication.
Digital Mockup and Prototype Generation
We create digital mockups of buildings, interior spaces, industrial equipment, products, and facilities to help review design, structure, layout, usability, and interference factors in advance.
On-Premises and sLM Systems
We build secure AI environments that run on internal servers or dedicated infrastructure without sending sensitive data outside.
Design & Visualization AI
We connect ideas and requirements to estimation, design, and simulation
Construction, interior, manufacturing, and industrial facility projects require several specialized stages, from initial consultation through estimation, design, review, construction, and customer explanation. YEJIN uses AI to connect project requirements, site materials, drawings, materials, unit prices, design standards, and visual assets, building an industry-specialized AI environment that extends from cost estimation to design support, 2D, 3D, and VR simulation, digital mockups, and project video generation.
Automated Estimation and Cost Calculation
We analyze drawings, specifications, material lists, areas, quantities, and unit-price data to support quantities by trade, material costs, labor costs, expenses, and estimated quotations.
Quantity and Trade Analysis
We extract material, equipment, area, length, quantity, and trade information from drawings and design materials to support quantity takeoff and construction planning.
Drawing and Design Support
We analyze customer requirements, site and spatial conditions, design standards, and existing drawings to support layout options, floor plans, concept design, and drawing drafts.
Design Review and Error Detection
We compare drawings and design materials to detect specification mismatches, omissions, potential interference, design changes, and items requiring review.
2D and 3D Spatial Simulation
Based on floor plans and spatial information, we support reviewing spatial layout, interior composition, equipment placement, and circulation in 2D and 3D environments.
VR Virtual Experience
Before construction or fabrication, we support experiencing buildings, interior spaces, and industrial facilities in a virtual environment and reviewing circulation, sightlines, spatial feel, and facility layout.
Digital Mockup Generation
We generate digital mockups and prototypes that reflect the form, size, material, and layout conditions of products, equipment, spaces, and facilities to support decision-making and design validation.
Industry-Specific Project Video Generation
We use drawings, 3D models, process plans, images, and reference materials to generate project videos for design, construction, training, proposals, and promotion.
We turn design and project data into explainable video
We build AI systems that use a project's drawings, 3D models, images, process plans, and reference materials to generate video for each industry's purpose.
Architecture and Interior Presentation Video
We visualize design concepts, spatial composition, key finishes, and the anticipated finished appearance in video to support understanding by clients and customers.
Industrial Facility Simulation Video
We represent production lines, equipment layout, process flow, worker circulation, and safety procedures in video for design review and training.
Construction and Installation Process Video
We use process plans and 3D data to generate simulation video of construction sequences, equipment installation, and stage-by-stage completion.
Product and Technology Introduction Video
We visualize product structure, operating methods, core technology, and usage environments for proposals, sales, exhibitions, and technical explanation.
Safety and Training Video
Based on work manuals, incident cases, and safety rules, we produce training video covering work procedures, hazardous situations, and response methods.
Project Promotion Video
We combine project plans, drawings, renderings, and project information to generate content for bid proposals, investment briefings, sales, promotion, and exhibitions.
Estimates, drawings, designs, and simulation results generated or analyzed by AI are materials intended to support decision-making and work. Final design, construction cost, permitting, and structural and safety judgments must go through review against the relevant standards and by qualified professionals.
Architecture
From data to execution and visualization, connected in a single architecture
YEJIN's Custom AI is not about developing a single model or chatbot; we design the organization's data, operations, systems, security policy, and industry-specific generation engines as one integrated architecture.
User Touchpoints
- Web
- Mobile
- Internal Portal
- Business Systems
- Chatbot
- Admin Screens
AI Orchestration
- Query intent analysis
- Task type determination
- Security condition assessment
- Selection of model, RAG, agent, and generation engine
- Integrated control of the processing flow
AI Models, Agents, and Generation Engines
- Global LLMs
- Proprietary sLM
- RAG Knowledge Retrieval
- Task-specialized AI Agents
- Automated estimation and cost calculation engine
- Drawing and design generation and review engine
- Image, 3D, and video generation models
- Simulation and optimization engine
Data Layer
- Documents and databases
- ERP, CRM, and groupware
- CAD, BIM, and drawing data
- Material, trade, and unit-price DB
- Images, video, and 3D models
- Sensor, equipment, and process data
- GIS and spatial information
- Project history and design change data
Business Integration Layer
- API
- SDK
- Workflow
- Lookup, registration, and approval
- Notifications
- Follow-up task automation
Security and Operations Layer
- User authentication
- Role and permission management
- Data encryption
- Personal data masking
- Audit logs
- Performance monitoring
- Knowledge base updates
Deployment
Deployment models
Choose based on your organization's scale, infrastructure, and security environment.
Cloud SaaS
For organizations that need rapid adoption and scaling, we deliver custom AI functionality in a cloud environment.
Private Cloud
We operate each enterprise's data and AI systems in isolation within a dedicated cloud or VPC.
On-Premises
A secure architecture that runs AI models, data, and search engines directly on internal servers and the corporate network.
Hybrid AI
Sensitive data is processed on an internal sLM while general work connects to external LLMs, optimizing performance and cost.
Why Yejin
Not a single model, but your organization’s AI operating system
Model-independent architecture
Without being locked to a specific AI model, you can choose from a range of LLMs and sLMs based on purpose, performance, cost, and security conditions.
Multi-Brain Cross-Model Validation
We compare and analyze results from multiple AI models to check for common points, differences, and logical contradictions in the information.
Integration of RAG and business systems
We go beyond document search to connect ERP, CRM, groupware, and databases with actual business workflows.
Custom AI personas
We configure the AI's role, perspective, terminology, and output format according to job, department, specialty, and business purpose.
Industry generative AI expansion
We combine automated estimation, drawing and design, 2D, 3D, and VR, digital mockups, and video generation with industry data.
Modular expansion architecture
We start with a single task and then progressively expand data, departments, agents, generation engines, and System Integration.
Built-in security and operations
We design access control, audit logs, performance management, and knowledge base updates together from the build stage.
Industry-data-driven optimization
We analyze the organization's operational data and industry-specific domain data to continuously optimize model selection, search accuracy, automation flows, and generated results.
Industries
We reflect each industry’s specialized data and workflows
Architecture and Construction
We support drawing analysis, automated construction cost estimation, process planning, design change comparison, quantity takeoff, and construction simulation.
Interior and Spatial Design
Based on customer requirements and spatial dimensions, we generate layout options, design concepts, material combinations, estimates, and 3D spatial drafts.
Industrial Facilities and Plants
We analyze equipment layout, production circulation, maintenance space, safety zones, and process flow, and support digital mockups and operational simulation.
Manufacturing and Product Development
Based on product requirements, part information, and design materials, we support concept models, prototypes, assembly review, and technical explanation content.
Real Estate and Development
We combine business plans, spatial composition, projected development plans, sales materials, and finished-project images to generate feasibility reviews and visual proposals.
Exhibition, Retail, and Commercial Spaces
We simulate product placement, customer circulation, spatial staging, and operating scenarios for stores, exhibition halls, and commercial facilities.
Enterprises and Public Institutions
We build internal knowledge retrieval, document administration, support, data analysis and forecasting, and secure on-premises AI.
Agriculture, Livestock, and Smart Industries
We connect growth, breeding, environmental, sensor, and production data to support forecasting, anomaly detection, facility simulation, and training content generation.
Process
We work with you from defining the problem to operational enhancement
- 1
Operations and Requirements Diagnosis
We analyze current operations, project types, deliverables, repetitive tasks, data, and AI adoption goals.
- 2
Data and System Analysis
We review documents, databases, CAD and BIM, drawings, materials and unit prices, 3D models, video assets, and existing systems.
- 3
AI Architecture Design
We design the architecture for LLMs and sLMs, RAG, agents, automated estimation, design and visualization, and System Integration.
- 4
Data Standardization and Training
We refine documents, drawings, trades, materials, unit prices, design standards, and project history into a structure the AI can use.
- 5
PoC Development and Validation
Based on real projects, we validate accuracy, estimation and design suitability, generated results, and business impact.
- 6
Full System Build
We implement the AI models, data integration, estimation, design, and simulation engines, admin functions, and user screens.
- 7
Operations and Enhancement
We reflect actual project results and user feedback to continuously improve the models, data, and business workflows.
- 8
Performance Measurement and Rollout
Based on operational data, we evaluate key performance indicators such as accuracy, processing time, automation rate, and user satisfaction, and progressively roll out validated AI functionality to other departments and projects.
Operations
We manage the system so it stays reliable after deployment
Model Performance Monitoring
We continuously check response accuracy, processing speed, error rates, and system resource usage.
Knowledge Base Updates
We reflect new documents and revised rules to keep search information and AI answers current.
Industry Data Updates
We keep materials, unit prices, trades, design standards, project history, and generated assets up to date.
User and Permission Management
We manage access rights to data and AI functions by department, role, and scope of work.
Log and Audit Management
We record and review queries, referenced documents, generated results, approvals, and system activity history.
Security Policy Management
We update access control, masking, and data protection standards in response to new threats and internal policy changes.
Model and Workflow Improvement
We reflect operational data and user feedback to enhance prompts, search structures, and agent processing procedures.
Incident Response and Recovery Management
We detect service outages, model errors, and data processing anomalies, analyze root causes, and support rapid recovery and stable service continuity.
Cost and Resource Optimization
We analyze model call volume, GPU and server usage, and processing costs to balance performance and cost and improve infrastructure operating efficiency.
For You
Ideal for organizations that standard AI solutions cannot fully address
- Enterprises connecting internal documents and data to AI
- Organizations automating repetitive information search and document work
- Enterprises needing AI integration with ERP, CRM, and groupware
- Institutions needing their own AI support and knowledge retrieval system
- Architecture and construction firms
- Interior and spatial design companies
- Industrial facility and plant companies
- Manufacturing and product development companies
- Design and engineering firms
- Real estate development and sales companies
- Exhibition and commercial space planning companies
- Organizations needing automated estimation, design, and visualization systems
- Organizations handling personal data, technical materials, and trade secrets
- Public institutions needing On-Premises and air-gapped AI
Frequently Asked Questions
It is a service that analyzes an enterprise's or institution's operating environment, data, existing systems, and requirements to design, develop, and integrate dedicated software and AI systems. We build work that off-the-shelf solutions cannot address to fit the organization's processes.
Depending on an enterprise's operations and industry characteristics, we can build ERP, SCM, CRM, and HRM, groupware and electronic approval, document management (DMS, EDMS), knowledge management (KMS), customer support, reservation, and order systems, POS, inventory, and logistics management, internal work portals, RAG Knowledge Retrieval, AI Agents and Workflow Automation, data analysis and forecasting systems, and automated estimation, design, and visualization systems.
Yes. We can analyze your currently operating ERP, CRM, groupware, website, and databases to add only the features you need or integrate with new systems. We also support a phased improvement approach that does not require fully replacing the existing system.
Yes. We can combine RAG, generative AI, data analysis, forecasting models, and AI Agents with general business systems. We configure the AI features your actual work needs, such as document search, report writing, customer service, estimation and ordering, data analysis, and repetitive task automation, as custom solutions.
We proceed through current-state and requirements analysis, business process definition, feature, data, and security design, UI/UX and architecture design, development and System Integration, integration testing and user validation, training and transition to operations, and maintenance and enhancement. At each stage, we review deliverables with the client's contacts and develop based on the approved scope.
It varies by features, number of users, data, System Integration, and security requirements. A single task or small system may take about 2–4 months, a mid-size system covering several tasks about 4–8 months, an enterprise-wide system or complex SI project about 8 months or more, and a preliminary PoC about 4–8 weeks. The exact schedule is determined after requirements analysis and confirmation of the build scope.
The cost is calculated based on the features developed, number of screens, number of users, data migration, external System Integration, AI models, infrastructure, security, and the scope of maintenance. After requirements analysis, we provide a quotation that includes the development scope, schedule, staffing, and deliverables for each feature.
Yes. When rapid deployment and scalability are needed, cloud can be used; when data control and internal network security are important, On-Premises or Private Cloud can be applied. Depending on the criticality of the work, a Hybrid architecture combining cloud and internal systems can also be configured.
The scope of ownership for source code, deliverables, data, and intellectual property is clearly defined at the contract stage. Original data and business materials provided by the customer are processed within the scope of the contract's purpose, and the handover scope for accounts, documents, and technical materials needed to operate the system is also agreed upon.
Yes. We support system monitoring, incident response, security patching, data backup, user and permission management, performance improvement, and feature additions. By analyzing operational results and user input, we can also progressively expand to more departments, enhance AI functionality, and add integrations with existing systems.
It is fine if the AI you need is not on this list
We first understand your organization's problems and data, then design an actionable AI implementation plan. YEJIN does not unilaterally supply a fixed solution. From operations diagnosis to architecture design, PoC, system build, and operational enhancement, we build an AI environment that fits your organization together with you.