D8LooP - Practise Data Engineering

Preparing your workspaceloading the brief, studio & canvas…

buyersellerlistingorder

SCENARIO

You've joined StoreFlow, a retail inventory platform. Goods in transit can be reassigned between stores while in flight, transfers can be partly fulfilled, and some are reversed before receipt. The system must know available-to-sell at each store — including expected inbound that is still movable.

your model must answer

01The available-to-sell quantity for a SKU at a store right now, including confirmed inbound that is not yet reassigned?
02The status of a specific transfer — in transit, redirected, reversed, received — and its current destination?
03By week and region, total transfers, redirected transfers, reversed transfers, and their impact on stockouts?

out of scopeReplenishment · lead times · pricing · shrinkage counts · slotting

This exercise’s brief could not be loaded.The guided questions and their model answers come from the review service. It looks like it is not reachable — start it with pnpm dev:api and reload.The canvas below still works, so you can model now and run the review once the service is up.

Build starts here

The brief becomes the left drawer. The canvas stays the build surface.Study is done above. Build the tables here, hit review to validate, then use follow-ups to defend the model.

Practice studio

Ctrl/Cmd + C copyCtrl/Cmd + V pasteCtrl/Cmd + Z undoDelete remove

Start with the data model, then layer system context

Use entities and relationships for the real ERD. Add notes, containers, or curated cloud shapes only when they sharpen the story you are architecting.

68%

You built the model in the Studio. Now defend it.Inventory, shipments, and in-flight adjustments

Design review

The reviewer reads your model.

Preparing your workspaceloading the brief, studio & canvas…

buyersellerlistingorder

SCENARIO

your model must answer

01The available-to-sell quantity for a SKU at a store right now, including confirmed inbound that is not yet reassigned?
02The status of a specific transfer — in transit, redirected, reversed, received — and its current destination?
03By week and region, total transfers, redirected transfers, reversed transfers, and their impact on stockouts?

out of scopeReplenishment · lead times · pricing · shrinkage counts · slotting

Build starts here

The brief becomes the left drawer. The canvas stays the build surface.Study is done above. Build the tables here, hit review to validate, then use follow-ups to defend the model.

Practice studio

Ctrl/Cmd + C copyCtrl/Cmd + V pasteCtrl/Cmd + Z undoDelete remove

Start with the data model, then layer system context

Use entities and relationships for the real ERD. Add notes, containers, or curated cloud shapes only when they sharpen the story you are architecting.

68%

You built the model in the Studio. Now defend it.Inventory, shipments, and in-flight adjustments

Design review