What This Category of Data Looks Like
Daily documents from manufacturing enterprise equipment departments, workshop maintenance teams, and public utility departments include equipment ledgers, inspection checklists, maintenance plans, work orders, failure analysis, spare parts lists, and special equipment inspection records. Data sources include EAM/CMMS systems, equipment sensor data, operator inspection records, maintenance history archives, spare parts inventory ledgers, and statutory inspection reports. Update frequencies cover shift-based, daily/weekly/monthly cycles, and immediate submission when a fault occurs. Documents contain specialized fields such as equipment numbers, inspection parameters, spare part models, and inspection validity periods. Some documents use structured table formats, while others use semi-structured text.
What Constraints These Characteristics Impose on Document Parsing and Chunking
Most data in this category consists of structured tables and semi-structured professional text. Parsing must retain the association between table headers and corresponding content to avoid incorrect splitting. High-frequency, immediately updated fault documents and large quarterly maintenance plans require the parsing module to support fast processing of large files and timeout fault tolerance. For specialized fields such as equipment numbers and spare part models, chunk length must be adapted to the complete range of a single business record, and splitting across key information is not allowed. Maintenance windows are constrained by production scheduling, so chunked content must enable quick location of historical data for associated equipment to avoid interference from irrelevant content.
How to Set Configurations
The following configurations are based on the knowledge base document parsing module of FastGPT v4.17.0.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Adapts to the complete content of a single business record such as inspection checklists and failure analysis, avoiding splitting of specialized parameters and equipment numbers |
chunkSplitter | Split by paragraph + table header | Adapts to structured table documents, retains the association between table headers and corresponding row data, avoiding chunking across table headers |
PARSE_FILE_TIMEOUT_SECONDS | 300–600 seconds | Covers parsing requirements for large maintenance history documents of 10–20 MB, avoiding timeout errors during large file parsing |
UPLOAD_FILE_MAX_SIZE | 20 MB | Covers the maximum file size of commonly used documents such as quarterly maintenance plans and annual equipment ledgers for work teams |
chunkSettingMode | Manual configuration | Allows adjustment of chunking rules for special documents such as special equipment inspection records, adapting to the fixed format of statutory documents |
Three Common Mistakes
- Phenomenon: After uploading an Excel-format inspection checklist, the parsing result shows empty fields or misalignment between table headers and content. Cause: Structured table parsing mode was not enabled, and chunking was performed using plain text rules directly, resulting in damage to the table structure.
- Phenomenon: Parsing of Word-format maintenance work orders larger than 10 MB results in timeout errors. Cause: The
PARSE_FILE_TIMEOUT_SECONDSparameter was not adjusted, and the default short duration setting was used, which cannot complete parsing of large documents. - Phenomenon: Retrieval of fault-related records returns inspection content for a large number of unrelated devices. Cause: The
chunkSizesetting is too large, and multiple inspection records across devices are merged into the same chunk, leading to an expanded retrieval scope.
How to Confirm Configurations Are Correctly Set
- Upload a quarterly maintenance plan document of approximately 15 MB, check whether the parsing progress completes within 300–600 seconds with no timeout errors.
- Upload a structured Excel inspection checklist, verify that the parsed text retains the association between table headers and corresponding rows, with no missing or misaligned fields.
- Adjust
chunkSizeto 800 characters, retrieve the inspection record for a single device, confirm that the single chunk contains complete inspection items and parameter values. - Verify that uploading special equipment inspection reports under 20 MB results in no upload interception.
The values provided here are common starting points and should be measured against the reader's own samples.