What the Data for This Category Looks Like
Precast concrete component data sources include BIM detailed design documents, rebar and concrete batch ledgers, mold table and curing kiln operation records, laboratory test reports, and QR code traceability data bound to each individual component. Daily documents include component detailed drawings, rebar cutting lists, mold inspection records, pouring and vibration logs, curing cycle records, and demolding and factory inspection reports. Data is updated per individual component, per batch of components, and per curing batch in a kiln. Fields include component ID, rebar sleeve specification, curing duration, demolding strength value, and other traceability identifiers linked to the full production process.
Constraints on Multi-turn Dialogue and Prompt Engineering
Full production process data linked to precast concrete components imposes clear constraints on multi-turn dialogue and prompt configuration. Multi-source cross-process data must retain contextual identifiers such as component ID and batch number during dialogue. This avoids confusion from cross-individual or cross-batch retrieval. Multiple types of business documents require explicit retrieval scope limits in prompts. Only records from the corresponding production stage may be called. Frequently updated data per individual component or batch requires dynamic filtering of content from the current production cycle during dialogue. This prevents expired data from being used. Each individual component maps to a single on-site lifting position. Prompts must include position matching constraints to ensure traceability results align with on-site needs.
Configuration Specifications
The following configurations are based on FastGPT v4.17.0.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
| Context window length | First 8 turns of dialogue + 1000–1500 characters of retrieval results | Precast concrete component data has many linked production stages, so sufficient context is needed to match full process records |
| Retrieval document type restriction | Filter by three categories: component detailed drawings, curing records, and demolding inspection reports | Business document boundaries for this category are clear, limiting retrieval reduces invalid results |
variables bound parameters | Bind current component ID and production batch number | Each individual component corresponds to a single traceability chain, passing fixed identifiers via variables enables precise data filtering |
messages transmission rule | Only transmit the first 5 turns of dialogue content related to the current component | Frequently updated data does not require retaining excessive history, to avoid interfering with retrieval |
| Single retrieval limit | Top 3 matching results | Data volume per batch for this category is manageable, excessive results increase large model processing load |
chatId session identifier | Bind the unique ID of the current component | Ensures multi-turn dialogue context does not mix across components |
Three Common Misconfigurations
- Phenomenon: A quality traceability request is triggered during multi-turn dialogue, and an empty retrieval result is returned. However, entering the same keywords directly in the knowledge base can hit records for the target component. Cause: The current component ID is not bound in the prompt or
variables, so the retrieval scope covers all data, and the matching logic does not adapt to the precise retrieval needs of this category. - Phenomenon: A 404 Invalid URL (POST /api/chat/completions) error is returned when calling the dialogue interface. Cause: Corresponding interface permissions are not enabled in deployment configuration, or the request path does not match the platform's built-in interface routing rules.
- Phenomenon: The output length of the large model exceeds the preset word limit. Cause: The word count constraint in the prompt is not bound to the
variablesparameter, or no result truncation logic is added to the dialogue process, causing the large model output to exceed business requirements.
How to Verify Correct Configuration
- Enter a known component ID to trigger a quality traceability request, and confirm that the returned results only include production and inspection records related to that component.
- Call an interface test to confirm that the dialogue history transmitted via the
messagesparameter complies with the configured turn limit, and does not include irrelevant conversation content. - Check interface request parameters to confirm that
variableshas correctly bound the current component's production batch number and unique ID. - Trigger multi-turn dialogue, and confirm that key component identifier information is retained in each round of context, and no cross-component retrieval results appear.
The values provided are common starting points and should be measured against the reader's own samples.