What data for this category looks like
Typical entities in high-volume automotive parts manufacturing are brake, steering, chassis, interior and exterior, and powertrain suppliers. Daily generated documents include control plans, process flowcharts, work instructions, SPC reports, PPAP materials, and 8D reports. Data sources include customer drawings, special characteristic lists, ERP/MES systems, measurement and inspection tool data, equipment process parameters, and supplier quality certificates. Update frequency is per batch, per shift, or continuous collection. Most documents use structured layout with fixed fields and nested tables. Fields include process number, parameter tolerances, inspection frequency, and units such as millimeters, newton meters, and percentage standard industry units.
What constraints do these characteristics impose on document parsing and chunking
The multi-source heterogeneous document formats, high-frequency update rhythm, and strict field requirements of this category impose multiple constraints on document parsing and chunking. Significant format differences exist across documents from different sources: ranging from plain text work instructions to SPC reports with complex nested tables, requiring splitting logic adaptable to multiple structures. Both real-time equipment data collected continuously and batch-updated PPAP materials coexist, so chunking must balance real-time performance and completeness. Sensitive fields like customer special characteristics must be ensured not to be misaligned across chunks after splitting, to avoid impacting the accuracy of subsequent equipment inspection and maintenance Q&A.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Adapts to the length of document sections containing process parameters and tables for this category, preventing single chunks from splitting across process steps or table logic |
chunkSplitter | Split by section headings, table dividers, and line breaks | Matches the structured layout of documents such as control plans and SPC reports, preventing incorrect splitting of table rows and columns |
customPdfParse | Enable local parsing | Avoids transmitting file content through third-party services, complies with data confidentiality requirements of the automotive industry, and adapts to parsing non-standard PDF formats |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Adapts the parsing duration for large single PPAP documents, preventing timeout failures due to excessive document size |
UPLOAD_FILE_MAX_SIZE | 100 MB | Covers the upload limit for multi-page PPAP materials and continuously collected equipment parameter logs in high-volume manufacturing scenarios |
Three Common Configuration Errors
- Phenomenon: After uploading a PDF containing multi-page PPAP materials, the parsing status shows a timeout failure, and the log returns timeout-related error messages. Cause: The
PARSE_FILE_TIMEOUT_SECONDSvalue was not adjusted to accommodate large documents, and the default threshold cannot cover the full parsing duration of complex documents. - Phenomenon: The parsed SPC report table has row and column misalignment, with header rows and corresponding data rows split into different chunks. Cause: The
chunkSplitterwas not configured to match the table separation rules within the document, and the default chunking logic incorrectly splits table content by fixed character length. - Phenomenon: The parsed result of the uploaded work instruction after API integration has empty fields, with no valid text returned. Cause: The
customPdfParselocal parsing mode was not enabled, and third-party parsing services blocked parsing requests for automotive industry sensitive documents due to data compliance requirements.
How to Verify Proper Configuration
- Upload a single control plan PDF, and verify that the parsed chunks retain the complete association between process numbers and corresponding parameters, with no cross-chunk splitting.
- Review the backend parsing logs to confirm that the parsing duration of a single document does not exceed the set
PARSE_FILE_TIMEOUT_SECONDSvalue, with no timeout errors. - Upload an 8D report containing nested tables, and verify that the table content is fully retained with no row or column misalignment or content loss.
- Call the FastGPT v4.17.0 API to upload a small-sized work instruction, and confirm that the returned parsing result contains complete text and structured field information.
The values given are common starting points and should be measured against the reader's own samples.