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Dfd Narrative

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Submitted By potatothrow
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DFD Narrative
External Entities
The current system involves four external entities, which include:
- Supplier: Provider of raw materials used for Ever Bar production.
- Kitchen: Mediates the actual production of Ever bars from the raw materials.
- Owner: Ever Bar business owner.
- Customer: Individual businesses that desire to purchase Ever Bars.

Inputs and Outputs
Input:
- Customer order request
- Raw material order request
- Batch order request
Output:
- Product (Ever Bars) for customer

Legend:
- Bold indicates a process
- [brackets] indicate an entity
- {curl brackets} indicate a data store
Context Diagram
The Supply Chain System is the root process of the system. The general data flow is as follows:
The [OWNER] initiates a Raw Materials Request (either by phone or email, requesting ingredients and amounts) is sent to the [SUPPLIER]. In response, the [SUPPLIER] emails an invoice back a supplier invoice through the system. The [OWNER] looks at the supplier invoice data to see what he's ordered.
A [CUSTOMER] (Dawson's market, Roots Market, etc.) calls the [OWNER] and with a purchase inquiry through a Product Request. That info is then flowed to the [OWNER] for review. The [OWNER] then creates a Customer Order Invoice, which is then sent back to the [CUSTOMER] as an Order Invoice.

To create batches, the [OWNER] first enters what he uses and quantity (Raw Materials Data), which is then used in his batch order. Once the batch has been produced through the [KITCHEN], it comes out as final goods in the form of Goods Produced Data (a.k.a number of bars produced, type of bar, etc.), and is stored into the system.

Level 0 :: Processes

The supply chain system is composed of five processes, which include: process customer order, update customer invoice file, process supplier invoice, product batch, and update batch file.

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