What this type of data looks like
Data for building construction engineering intelligent due diligence reports primarily comes from project approval documents filed with housing and urban-rural development authorities, project construction logs, bidding announcements, cost audit reports, and site survey records. Data is updated throughout the full project lifecycle, with corresponding updates during approval, construction, and completion phases. Most documents combine structured tables and paragraphs, containing fields such as basic project information, detailed cost breakdowns by division and subsection, progress milestones, and compliance acceptance records. Units include construction-specific units such as square meters, yuan, calendar days, tons, and MPa.
Constraints Imposed by These Characteristics on Multi-turn Dialogue and Prompt Engineering
Due diligence data for building construction engineering projects is scattered across sources and updated alongside project phases. Multi-turn dialogue must gradually guide users to clarify the specific section and time range of the target project, to avoid mixing data from different projects. Document structures are complex, and individual files can be lengthy. Multi-turn dialogue must accommodate context limits for long text processing, to prevent information loss from content overflow. There are many specialized fields and construction units. Prompts must clearly specify field extraction rules and unit verification logic, to avoid mixing up cost and area units. Additionally, dynamically updated data must support real-time recall of the latest filed and construction records. A data timeliness confirmation step must be added to the dialogue workflow.
How to Configure Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
maxContext | 8000–12000 characters | Individual building construction due diligence documents often span thousands of characters. Multi-turn dialogue must retain multi-phase project information and historical interaction content |
UPLOAD_FILE_MAX_SIZE | 500 MB | Individual completion audit reports and detailed cost documents often reach hundreds of megabytes. Support for large file upload and parsing is required |
PARSE_FILE_TIMEOUT_SECONDS | 1200 seconds | Parsing large construction documents takes significant time. This avoids early timeout interruptions to the parsing process |
Recall count | Top 8–10 entries | Building construction data fields cover multiple categories including cost, progress, and compliance. Sufficient entries must be recalled to cover query needs |
Similarity threshold | 0.75–0.85 | There are many specialized engineering terms. Balance must be maintained between recall precision and coverage, to avoid missing relevant compliance records |
Rerank result count | Top 5–6 entries | After secondary screening of recall results, the most relevant core data is retained for dialogue reference |
The parameter values provided on this page are common starting points for configuration setup. Actual values are affected by material format, data volume, and business rules. Each scenario requires tailored analysis. It is recommended to test against your own samples before finalizing values.
Three Common Configuration Mistakes
- Symptom: When running a long-text due diligence analysis task, the interface shows the task completed normally but returns the error
The value of "offset" is out of range. Cause: No reasonable long-text segmentation parameters were set, leading to exceeding the text index range during parsing and triggering a system underlying index verification error. - Symptom: Non-target project building construction cost and progress data is returned during dialogue. Cause: No project-level permission filtering rules were configured for the knowledge base, and the current dialogue's project approval number or section range was not bound in the prompt. This leads to recall of cross-project data.
- Symptom: After passing multiple engineering files to the dialogue interface, only some files are used as reference content. Cause: File parameters were not passed in the array format required by the interface. The single-file transfer field structure was used incorrectly, leading to some files not being loaded.
How to Verify Configuration Completion
- A building construction engineering document matching the target business scenario length is uploaded. During dialogue testing, the context window is verified to confirm full retention of the document’s core content. Corresponding parameters are adjusted to the range aligned with current business requirements.
- Multiple engineering files are passed to the dialogue interface. The reference document list returned by the interface is checked to confirm all passed files are included. File parameter transfer format is verified to comply with interface requirements.
- A query including construction-specific units is initiated. The returned results are checked to confirm correct unit matching, verifying that unit verification rules in the prompt are active.
- Multi-turn interaction is simulated, with sequential queries for information across different project dimensions. The dialogue context is checked to confirm retention of earlier project range limitations, preventing cross-project data mixing.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.