🎓 Student Projects (College Reports) · Data Flow
Online Shopping System Data Flow Diagram (Level 1)
Order data flowing between the customer, seller, payment gateway, courier and the shop's data stores.
Drawing diagram…
What this diagram shows
- Five processes from catalogue to delivery
- Stock updated when an order is placed
- Outside services shown as external entities
Prompt used
Level 1 data flow diagram for an online shopping system: the customer browses and places orders; the seller adds products; processes are manage catalogue, manage cart, place order, process payment and arrange delivery; the payment gateway returns payment status and the courier returns delivery updates; data stores are products, customers, orders and payments.
Mermaid code
flowchart LR
subgraph EXT ["🌐 External Entities"]
C["Customer"]
SL["Seller"]
PG["Payment Gateway"]
CR["Courier"]
end
subgraph PROC ["⚙️ Core Processes"]
P1["1.0 Manage catalogue"]
P2["2.0 Manage cart"]
P3["3.0 Place order"]
P4["4.0 Process payment"]
P5["5.0 Arrange delivery"]
end
subgraph STORE ["🗄️ Data Stores"]
D1[("D1 Products")]
D2[("D2 Customers")]
D3[("D3 Orders")]
D4[("D4 Payments")]
end
SL -->|"1. Product details"| P1
P1 -->|"2. Product record"| D1
D1 -->|"3. Catalogue"| C
C -->|"4. Items chosen"| P2
P2 -->|"5. Cart"| P3
D2 -->|"6. Address"| P3
P3 -->|"7. Order record"| D3
P3 -->|"8. Reduce stock"| D1
P3 -->|"9. Amount due"| P4
P4 -->|"10. Payment request"| PG
PG -->|"11. Payment status"| P4
P4 -->|"12. Payment record"| D4
P4 -->|"13. Paid order"| P5
P5 -->|"14. Pickup request"| CR
CR -->|"15. Delivery updates"| P5
P5 -->|"16. Order status"| CRelated templates
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