Custom AI
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.
Why Custom AI
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.
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 can search for information and answer questions, but it cannot automatically carry out follow-up work such as review, approval, reporting, and system entry.
Even within the same industry, data structures, systems, workflows, and security levels differ, so a standardized AI solution cannot be applied as-is.
The data and AI functions a user can access must be differentiated by their role, department, and scope of work.
AI is not a system that is built once and finished; it must continuously reflect new data, policy changes, and user feedback.
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 build custom conversational AI that answers questions from customers, employees, or the public based on internal data and business standards.
We vectorize internal documents, rules, manuals, reports, and databases to retrieve information that matches the meaning and context of a question.
We classify, summarize, and compare contracts, proposals, reports, applications, and other business documents, and extract key information and risk factors.
We build task-specialized AI agents that carry out information gathering, analysis, drafting, review, reporting, and follow-up work step by step.
We analyze structured and unstructured data together to forecast demand, sales, inventory, quality, operational risk, and changes in key indicators.
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.
We support floor plan composition, layout options, concept drawings, design drafts, and drawing review based on requirements, spatial information, specifications, and design standards.
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.
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.
We build secure AI environments that run on internal servers or dedicated infrastructure without sending sensitive data outside.
Design & Visualization AI
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.
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.
We extract material, equipment, area, length, quantity, and trade information from drawings and design materials to support quantity takeoff and construction planning.
We analyze customer requirements, site and spatial conditions, design standards, and existing drawings to support layout options, floor plans, concept design, and drawing drafts.
We compare drawings and design materials to detect specification mismatches, omissions, potential interference, design changes, and items requiring review.
Based on floor plans and spatial information, we support reviewing spatial layout, interior composition, equipment placement, and circulation in 2D and 3D environments.
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.
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.
We use drawings, 3D models, process plans, images, and reference materials to generate project videos for design, construction, training, proposals, and promotion.
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
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.
Deployment
Choose based on your organization's scale, infrastructure, and security environment.
For organizations that need rapid adoption and scaling, we deliver custom AI functionality in a cloud environment.
We operate each enterprise's data and AI systems in isolation within a dedicated cloud or VPC.
A secure architecture that runs AI models, data, and search engines directly on internal servers and the corporate network.
Sensitive data is processed on an internal sLM while general work connects to external LLMs, optimizing performance and cost.
Why Yejin
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.
We compare and analyze results from multiple AI models to check for common points, differences, and logical contradictions in the information.
We go beyond document search to connect ERP, CRM, groupware, and databases with actual business workflows.
We configure the AI's role, perspective, terminology, and output format according to job, department, specialty, and business purpose.
We combine automated estimation, drawing and design, 2D, 3D, and VR, digital mockups, and video generation with industry data.
We start with a single task and then progressively expand data, departments, agents, generation engines, and System Integration.
We design access control, audit logs, performance management, and knowledge base updates together from the build stage.
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 support drawing analysis, automated construction cost estimation, process planning, design change comparison, quantity takeoff, and construction simulation.
Based on customer requirements and spatial dimensions, we generate layout options, design concepts, material combinations, estimates, and 3D spatial drafts.
We analyze equipment layout, production circulation, maintenance space, safety zones, and process flow, and support digital mockups and operational simulation.
Based on product requirements, part information, and design materials, we support concept models, prototypes, assembly review, and technical explanation content.
We combine business plans, spatial composition, projected development plans, sales materials, and finished-project images to generate feasibility reviews and visual proposals.
We simulate product placement, customer circulation, spatial staging, and operating scenarios for stores, exhibition halls, and commercial facilities.
We build internal knowledge retrieval, document administration, support, data analysis and forecasting, and secure on-premises AI.
We connect growth, breeding, environmental, sensor, and production data to support forecasting, anomaly detection, facility simulation, and training content generation.
Process
We analyze current operations, project types, deliverables, repetitive tasks, data, and AI adoption goals.
We review documents, databases, CAD and BIM, drawings, materials and unit prices, 3D models, video assets, and existing systems.
We design the architecture for LLMs and sLMs, RAG, agents, automated estimation, design and visualization, and System Integration.
We refine documents, drawings, trades, materials, unit prices, design standards, and project history into a structure the AI can use.
Based on real projects, we validate accuracy, estimation and design suitability, generated results, and business impact.
We implement the AI models, data integration, estimation, design, and simulation engines, admin functions, and user screens.
We reflect actual project results and user feedback to continuously improve the models, data, and business workflows.
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 continuously check response accuracy, processing speed, error rates, and system resource usage.
We reflect new documents and revised rules to keep search information and AI answers current.
We keep materials, unit prices, trades, design standards, project history, and generated assets up to date.
We manage access rights to data and AI functions by department, role, and scope of work.
We record and review queries, referenced documents, generated results, approvals, and system activity history.
We update access control, masking, and data protection standards in response to new threats and internal policy changes.
We reflect operational data and user feedback to enhance prompts, search structures, and agent processing procedures.
We detect service outages, model errors, and data processing anomalies, analyze root causes, and support rapid recovery and stable service continuity.
We analyze model call volume, GPU and server usage, and processing costs to balance performance and cost and improve infrastructure operating efficiency.
For You
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.
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.