README: reorder configs (EN first for preview), add visualisations, OpenConstructionERP link

README.md

@@ -40,74 +40,78 @@ pretty_name: CWICR — Construction Works, Items, Costs & Resources (30 Countrie
 configs:
   - config_name: default
     data_files:
-      - split: ar
-        path: AR/*.parquet
+      - split: en
+        path: EN/*.parquet
+      - split: us
+        path: US/*.parquet
+      - split: uk
+        path: UK/*.parquet
       - split: au
         path: AU/*.parquet
-      - split: bg
-        path: BG/*.parquet
-      - split: cs
-        path: CS/*.parquet
+      - split: nz
+        path: NZ/*.parquet
+      - split: ng
+        path: NG/*.parquet
+      - split: za
+        path: ZA/*.parquet
       - split: de
         path: DE/*.parquet
-      - split: en
-        path: EN/*.parquet
-      - split: es
-        path: ES/*.parquet
       - split: fr
         path: FR/*.parquet
-      - split: hi
-        path: HI/*.parquet
-      - split: hr
-        path: HR/*.parquet
-      - split: id
-        path: ID/*.parquet
-      - split: it
-        path: IT/*.parquet
-      - split: ja
-        path: JA/*.parquet
-      - split: ko
-        path: KO/*.parquet
+      - split: es
+        path: ES/*.parquet
       - split: mx
         path: MX/*.parquet
-      - split: ng
-        path: NG/*.parquet
+      - split: pt
+        path: PT/*.parquet
+      - split: it
+        path: IT/*.parquet
       - split: nl
         path: NL/*.parquet
-      - split: nz
-        path: NZ/*.parquet
+      - split: ru
+        path: RU/*.parquet
       - split: pl
         path: PL/*.parquet
-      - split: pt
-        path: PT/*.parquet
+      - split: cs
+        path: CS/*.parquet
+      - split: hr
+        path: HR/*.parquet
+      - split: bg
+        path: BG/*.parquet
       - split: ro
         path: RO/*.parquet
-      - split: ru
-        path: RU/*.parquet
       - split: sv
         path: SV/*.parquet
-      - split: th
-        path: TH/*.parquet
       - split: tr
         path: TR/*.parquet
-      - split: uk
-        path: UK/*.parquet
-      - split: us
-        path: US/*.parquet
-      - split: vi
-        path: VI/*.parquet
-      - split: za
-        path: ZA/*.parquet
+      - split: ar
+        path: AR/*.parquet
+      - split: hi
+        path: HI/*.parquet
       - split: zh
         path: ZH/*.parquet
+      - split: ja
+        path: JA/*.parquet
+      - split: ko
+        path: KO/*.parquet
+      - split: th
+        path: TH/*.parquet
+      - split: vi
+        path: VI/*.parquet
+      - split: id
+        path: ID/*.parquet
 ---
 
 # CWICR — Construction Works, Items, Costs & Resources
 
+![Top expensive items across CWICR](./assets/top_expensive_items.png)
+
 **A multilingual, machine-readable database of national construction rate books for 30 countries / language locales.** Each rate is fully decomposed into its work composition and resource breakdown (labour, machinery, materials), with unit prices, hierarchical classification, and physical parameters preserved in the source language.
 
 This dataset is the **tabular source-of-truth** behind the [`cwicr-vector-db-bgem3-v3`](https://huggingface.co/datasets/DataDrivenConstruction/cwicr-vector-db-bgem3-v3) Qdrant snapshots. Use this repository when you need raw numeric data (prices, quantities, time norms); use the vector DB repository when you need semantic search over rate descriptions.
 
+> 💡 **Looking for a complete estimation platform?** CWICR powers the cost database inside [**OpenConstructionERP**](https://github.com/datadrivenconstruction/OpenConstructionERP) — an open-source modular ERP for construction (BOQ editor, BIM/CAD import, AI takeoff, GAEB XML, AGPL-3.0). The ERP consumes the parquets here and the Qdrant snapshots in the companion repo to provide localised cost estimation in 30 markets out of the box.
+
 ## Contents per country
 
 Each language directory (`AR/`, `BG/`, `CS/`, `DE/`, …) contains:
@@ -194,9 +198,33 @@ Each rate book uses its **native classification system** (Russian СНиП codes
 
 - **Vector DB snapshots** (Qdrant, hybrid BGE-M3 dense + sparse + resources, ready to restore):  
   → [`DataDrivenConstruction/cwicr-vector-db-bgem3-v3`](https://huggingface.co/datasets/DataDrivenConstruction/cwicr-vector-db-bgem3-v3)
+- **OpenConstructionERP** — production ERP that consumes this dataset (BOQ editor, BIM/CAD import, AI takeoff, GAEB):  
+  → [`github.com/datadrivenconstruction/OpenConstructionERP`](https://github.com/datadrivenconstruction/OpenConstructionERP)
 - **Source code / pipelines** (encoders, classifiers, search demos, BIM matchers):  
   → [`github.com/datadrivenconstruction/OpenConstructionEstimate-DDC-CWICR`](https://github.com/datadrivenconstruction/OpenConstructionEstimate-DDC-CWICR)
 
+## Exploring the data
+
+Below are a few summary visualisations produced directly from the parquet files (chart code lives in the [source repository](https://github.com/datadrivenconstruction/OpenConstructionEstimate-DDC-CWICR) under `0_Workflow and Pipelines CWICR/python/08-data-analysis/`).
+
+### Cost distribution by department
+
+Boxplots of total cost per rate position, grouped by department. Heat-supply and rolling-equipment works dominate at the top end; electrical-installation rates are tightly clustered in the low-cost band.
+
+![Cost distribution by department](./assets/cost_distribution_by_department.png)
+
+### Material vs labour cost
+
+Scatter of (material cost, labour cost) per rate, coloured by department. Three regimes are visible: labour-heavy structural works (left vertical band), material-heavy mechanical installations (top-right cluster) and balanced general-purpose rates (diagonal).
+
+![Material vs labour cost](./assets/labor_vs_material_ratio.png)
+
+### Resource utilisation
+
+Distribution of how often each resource type (labour roles, machinery classes, material families) is consumed across all rates.
+
+![Resource utilisation](./assets/resource_utilization.png)
+
 ## Data sources
 
 CWICR aggregates publicly available national rate catalogues: