About AI Quotation Wizard

AI Quotation Wizard is an AI-powered backend automation solution that transforms complex aluminium window supplier drawings (Zobeko PDFs) into quotation-ready structured data. The system eliminates manual interpretation of technical drawings, where engineers previously spent hours calculating glass dimensions, quantities, and areas with a high risk of human error.

Built on an n8n workflow and powered by Qwen2-VL, the solution intelligently reads supplier PDFs, interprets technical drawing annotations, extracts precise glass fabrication details, and performs accurate material calculations. The processed data is delivered to frontend, enabling faster, more reliable, and scalable quotation generation.

AI_Quotation_Wizard_FlowArchitectureDiagram

Solution Highlights

Automated PDF Intake & Processing

Ingests Zobeko PDFs via webhook.
Converts files to vector text and images.

AI-Based Drawing Interpretation

Reads technical drawings using Qwen2-VL.
Processes pages independently for accuracy.

Glass Dimension Extraction

Extracts glass width, height, and thickness.
Excludes frame and non-glass data.

Position & Quantity Detection

Identifies position labels and quantities.
Maps annotations accurately.

Model / Shape Glass Detection

Flags angled or slanted glass.
Uses bounding-box logic for calculation.

Automated Glass Area Calculation

Computes glass area in square meters.
Applies quantity-based aggregation.

Data Validation & Normalization

Outputs strict, validated JSON.
Omits unclear or incomplete data.

Structured Output

Delivers quotation data to frontend.

Key Features

PDF Intake & Preprocessing

Receives supplier PDFs via webhook.
Converts PDFs to vector text and images.

AI Vision & Text Analysis

Interprets technical drawings using GPT-4o.
Extracts glass-related attributes.

Glass Data Extraction

Captures dimensions, thickness, and quantities.
Ignores non-glass construction elements.

Position & Annotation Mapping

Detects position labels and drawing references.
Links quantities to correct glass panels.

Model / Shape Detection

Identifies angled or slanted glass panels.
Applies geometry-based bounding logic.

Calculation & Aggregation

Calculates glass area in square meters.
Aggregates results by position and thickness.

Data Validation & Normalization

Validates AI output into strict JSON.
Excludes ambiguous or invalid data.

API Response & Integration

Returns quotation-ready structured JSON.
Integrates seamlessly with frontend systems.

Results achieved

Reduces quotation preparation time from hours to minutes through automated drawing analysis.
Eliminates manual calculation errors with AI-driven dimension extraction and validation.
Improves quotation accuracy by extracting only glass-relevant data from technical drawings.

Scales effortlessly to handle high volumes of supplier PDFs with consistent results.
Enhances operational efficiency by standardizing and automating the quotation workflow.