What the data for this category looks like
Data sources for renovation and decoration intelligent due diligence reports cover construction party qualification documents, material purchase lists, on-site supervision records, renovation budget sheets, completion acceptance forms, and accompanying construction drawings. Update frequency is adjusted irregularly along with project progress. New supplementary documents are generated during material on-site placement, node acceptance, and other stages. Most documents are multi-page PDFs or combined structured tables. They include fields such as project name, renovation scope, material brand and model, construction process parameters, acceptance standards, and expense details. Fields like material usage, area, and construction period use dedicated units: m², sets, days, yuan/m².
What constraints these characteristics impose on model access and configuration
The multi-source heterogeneous data characteristics of renovation and decoration due diligence reports require model access to support both plain text parsing and multi-modal drawing recognition. This avoids missing key drawing-related information. Documents are generally large in size and contain complex tables. This imposes higher requirements on file upload limits and parsing timeout settings. Many similar terms exist in this domain, such as wall paint and latex paint, ceiling and ceiling decoration. Adjust the similarity threshold to balance recall accuracy and coverage. Irregularly updated documents need to adapt to incremental indexing logic. This prevents resource waste caused by full repeated parsing.
How to set configurations
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
UPLOAD_FILE_MAX_SIZE | 1000 MB | Renovation and decoration due diligence reports often integrate multiple construction drawings, material lists and acceptance documents. Single file size is usually larger than general documents |
PARSE_FILE_TIMEOUT_SECONDS | 900 seconds | Parsing multi-page structured tables and high-definition drawings takes a long time. Reserve sufficient processing time |
chunk_size | 800–1200 characters | Renovation documents contain long texts such as process descriptions and material parameters. Segment length adapts to term context association logic |
Recall Count | Top 6–8 entries | Due diligence reports cover multi-dimensional information including construction party qualifications, material brands and acceptance standards. Recall volume must cover core dimensions |
Similarity Threshold | 0.72–0.78 | Many similar terms exist in the renovation field, such as "wall latex paint" and "interior wall coating". Adjust threshold to balance accuracy and recall coverage |
VL_MODEL_ENABLE | Enabled | Renovation due diligence reports often include construction node drawings and on-site photos. Use multi-modal models to parse non-text materials |
The parameter values provided on this page are common recommended starting points for configuration. Actual values depend on material formats, data volume and business rules. Analyze specific issues on a case-by-case basis, and test on your own samples before finalizing.
Three common errors
- Uploading a PDF file that integrates multiple construction drawings triggers an upload failure error. The cause is that the
UPLOAD_FILE_MAX_SIZEparameter is not adjusted. The default threshold cannot accommodate large-volume renovation-related documents. - In a Docker deployment environment, knowledge base indexing progress stalls without response. The cause is that a reasonable
PARSE_FILE_TIMEOUT_SECONDSvalue is not set. Parsing time for complex tables and drawings in renovation documents exceeds the default timeout limit. - No drawing-related content is returned when configuring a multi-modal model, or an access point error is prompted when configuring a general large model. The cause is that the
VL_MODEL_ENABLEconfiguration is not enabled, or the official access endpoint of the corresponding service provider is not used.
How to verify successful configuration
- Verify that table content and drawing annotation information are extracted after parsing when a test PDF including construction drawings and material lists is uploaded.
- Verify that returned content covers the three core dimensions required for renovation due diligence — qualification, materials, and construction — when a model call request is sent.
- Review knowledge base indexing logs to confirm that parsing time does not exceed the preset timeout threshold and indexing progress has no abnormal stalls.
- Adjust the similarity threshold and run a similar content recall test to verify that similar terms such as "interior wall coating" and "wall latex paint" are correctly recalled.
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.