What the data for this category looks like
The data for construction machinery policy and regulatory basis comes primarily from official government websites, industry association standard libraries, and enterprise internal compliance documents. It covers access, operation, and safety standards for categories including lifting machinery, excavators, loaders, and others. Document structure includes policy document numbers, effective dates, applicable equipment types, technical parameter requirements, penalty clauses, and attachment lists. Fields cover rated lifting weight, operating radius, runtime, and more. Units are typically tons, meters, hours. National standards are revised every 1-2 years. Industry policies are updated quarterly per regulatory requirements. Enterprise internal documents are updated as needed.
What Constraints These Characteristics Impose on Multi-turn Dialogue and Prompt Engineering
Single construction machinery policy documents can be tens of thousands of characters long. Multi-turn dialogue must retain context to link equipment types and policy clauses mentioned by the user in sequence. This avoids ambiguity. Fields include technical parameters with units. Prompts must explicitly require matching field units. This prevents missing key information in extraction results. Policies are updated frequently. Multi-turn dialogue must sync policy effective dates to ensure answer timeliness. Some policies include attachment lists. Retrieval must link main documents and attachments. This avoids missing supplementary clauses.
How to Configure the Setup
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
messages | Retain the last 10 rounds of dialogue context | Track equipment types, policy document numbers, and other information mentioned by the user in sequence, to avoid ambiguity in multi-turn dialogue |
variables | Pass the current query's equipment category and policy effective date range | Limit the scope of retrieved policy documents, narrow the retrieval range, and improve answer accuracy |
| Maximum context length | 8000–12000 characters | Adapt to the length of single policy documents, avoid truncating key clauses and attachment content |
| Question optimization | Enabled, supplement missing equipment type information | Automatically complete associated information for questions where the user omits the preceding equipment type |
| Single retrieval limit | Top 6 results | Balance retrieval accuracy and context length, avoid excessive policy clauses interfering with model output |
chatId | Bind user session ID | Enable cross-time, cross-device retention of multi-turn dialogue context, and meet compliance session traceability requirements |
Three Common Mistakes
- Phenomenon: The retrieved policy clauses in the conversation details do not match the construction machinery type specified in the user's question. Cause: The equipment category parameter was not passed in
variables, leading the retrieval scope to cover all policy documents and resulting in irrelevant clauses. - Phenomenon: The policy technical parameters returned by the model do not carry units, or the units do not match requirements. Cause: The prompt did not explicitly require matching the field's units, leading to loss of key unit information for parameters such as rated lifting weight and operating radius.
- Phenomenon: The model forgets the previously mentioned equipment type after multi-turn dialogue and cannot continue the response. Cause: The
messagescontext retention configuration was not enabled, or the context length was set too small, truncating key information from prior dialogue.
How to Verify the Configuration Is Correctly Set Up
- Initiate two rounds of test dialogue. First ask "What are the access policies for lifting machinery", then ask "What are the requirements for rated lifting weight among them". Verify whether the model links to the access policy clauses for lifting machinery.
- Check the session log to confirm that the equipment category parameter passed in
variableswas correctly extracted and used for policy retrieval. - Review the conversation details to confirm that the retrieved policy clauses carry clear effective dates and unit parameters.
- Initiate questions for different construction machinery categories (such as excavators, loaders) and verify that the retrieved policy documents match the corresponding categories.
The values provided here are common starting points, and should be evaluated against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.