What This Category of Data Looks Like
Data for this category comes from the full production processes of color printing, label, carton, flexible packaging, and pharmaceutical packaging enterprises. Daily documents include pre-press files, imposition sheets, printing process sheets, ink color matching records, first article sign-off samples, barcode inspection records, and die-cutting and lamination records. Data sources cover customer manuscripts, color management systems, printing press operation data, ink and substrate batch archives, spectrometer test results, and barcode detector test results. Updates are triggered per order, per batch, or each time a plate is changed. Each individual document includes fields such as version number, color parameters, batch number, and test results.
Constraints Imposed on Knowledge Base Retrieval and Recall
Since data is updated frequently per order, batch, or plate change, the knowledge base must support real-time synchronization of newly generated process sheets, test records, and other documents. This prevents retrieval results from being out of sync with current production batches. Documents contain specialized sub-fields such as version number, color parameters, and batch number. Retrieval must accurately match these corresponding fields to avoid mixing ink ratios or die-cutting parameters from different batches. Individual document structures have minor differences but strong professional field requirements. Irrelevant cross-category documents must be excluded. The system must also adapt to data sources in different formats, including pre-press files and test reports, to ensure full coverage of all types of business documents.
Configuration Settings
The following configurations are based on FastGPT v4.17.0, and are adapted for the equipment inspection and maintenance Q&A scenario for printing and packaging processing:
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
similarity | 0.75–0.85 | Matches specialized fields such as printing process sheets and ink parameters, filters low-relevance outdated documents, and adapts retrieval accuracy for professional content |
limit | Top 8 entries | The number of production-related documents per batch is limited, controlling the number of recalled entries to avoid context overload, aligning with the document scale of single-batch printing and packaging business |
searchMode | embedding | Uses semantic/vector retrieval for specialist terminology; exact color-parameter and batch-number constraints require separate filters |
usingReRank | Enabled | Reorders recalled results by business relevance, prioritizing core inspection and maintenance reference documents such as first article sign-off samples and die-cutting records |
datasetSearchUsingExtensionQuery | Enabled | Automatically expands question phrasing related to inspection and maintenance, such as associating "registration misalignment" with corresponding printing process parameters, to expand retrieval coverage |
collectionIds | Grouped by production workshop/product line | Differentiates printing documents across categories, prevents recall of irrelevant data from other workshops, narrows retrieval scope and improves accuracy |
Three Common Configuration Mistakes
- Symptom: A parameter format error prompt is triggered when passing a knowledge base ID variable, or retrieval returns no results. Cause: The variable is not bound to the
collectionIdsconfiguration item of the knowledge base retrieval node, or the variable format does not meet system requirements. - Symptom: When initiating a targeted query for a single PDF document, the target document cannot be accurately matched. Cause: The
collectionIdsparameter is not used to limit the knowledge base collection to which the target document belongs, leading the retrieval scope to cover the entire database and mixing documents from other batches. - Symptom: After the knowledge base search node in the workflow executes, the preset empty result processing branch is not triggered, and the process directly proceeds to the subsequent abnormal flow. Cause: No empty result branch is added in the node configuration, or the corresponding exception handling node is not correctly bound.
How to Verify Proper Configuration
- Upload a single printing process sheet to the specified knowledge base collection, initiate a query containing the corresponding batch parameters, and check whether the retrieval results include the target document.
- Adjust the
similaritythreshold, verify whether the relevance of retrieval results meets business requirements, and confirm the rationality of the threshold setting. - Trigger the knowledge base search node in the workflow, simulate an empty retrieval scenario, and confirm whether the preset exception handling logic is triggered.
- Bind the knowledge base ID variable to the retrieval node, initiate a test conversation, and verify that the variable takes effect normally and returns corresponding results.
The values given are common starting points and should be measured against the reader's own samples.