diff --git a/docs/data-platform-manual.md b/docs/data-platform-manual.md
index 20c2b20..cc30352 100644
--- a/docs/data-platform-manual.md
+++ b/docs/data-platform-manual.md
@@ -46,41 +46,33 @@ An **S3-compatible storage provider** (e.g., MinIO) used to store and retrieve u
 ## Workflow
 
 ```mermaid
-flowchart TD
+flowchart TB
 
-%% STAGE 1: DATA SOURCES
-A["Data Sources
-(S3 / MinIO, DBs, APIs)"] -->|Ingestion Jobs| B[Apache Airflow]
+subgraph src ["Data source"]
+direction LR
+ext_api[/"API<br>(HTTP, REST, Graph)"/]
+ext_s3@{ shape: cyl, label: "Object Storage<br>(S3, MinIO, GCS)" }
+ext_db@{ shape: cyl, label: "Database<br>(MySQL, PostgreSQL)" }
+ext_fs@{ shape: cyl, label: "Filesystem<br>(HDFS, NAS)" }
+end
 
-%% STAGE 2: RAW STORAGE
-B -->|Store Raw Data| C["Raw Zone
-(S3 / MinIO)"]
+subgraph emgr ["Data Platform"]
+dag@{ shape: docs, label: "Python DAG" }
+af["Airflow"]
+tr["Trino"]
+ss("Superset")
+end
 
-%% STAGE 3: TRANSFORMATION
-C -->|DAG / ETL / SQL Queries| D["Trino
-(Query Engine)"]
-B -->|Workflow Orchestration| D
+s3@{ shape: cyl, label: "S3<br>(MinIO)" }
 
-%% STAGE 4: PROCESSED STORAGE
-D -->|Write Processed Data| E["Processed / Curated Zone
-(S3 / MinIO)"]
+dag -- (1a)<br>Fetch<br>raw data<br>(API, SDK) --> src
+dag -- (1b) --> tr
+tr -- (1b)<br>Fetch<br>raw data<br>(Trino connector) --> src
+af -- (2)<br>Execute<br>script --> dag
+dag -- (3)<br>Store<br>processed<br>data<br>(SQL) --> tr
+s3 <-- (4)<br>Read/write data<br>(Hive / Iceberg format) --> tr
+ss -- (5)<br>Query<br>processed<br>data<br>(SQL) --> tr
 
-%% STAGE 5: QUERY LAYER
-E -->|Query Interface| F["Trino
-(SQL Access Layer)"]
-
-%% STAGE 6: VISUALIZATION
-F -->|Data Access| G["Apache Superset
-(Dashboarding & Analytics)"]
-
-%% LABELS
-classDef core fill:#4a90e2,stroke:#2c3e50,stroke-width:1px,color:white;
-classDef storage fill:#6dbf4b,stroke:#2c3e50,stroke-width:1px,color:white;
-classDef optional fill:#aaaaaa,stroke:#333,stroke-width:0.5px,color:white;
-
-class B,D,F,G core;
-class C,E storage;
-class H1,H2,H3,H4 optional;
 ```
 
 ## Data Pipeline