DFD DIAGRAM

PRESENTED BY:CHRIS WILLIAMS

SUGI TERBISHCARL SMITH

Dow Chemical

Business Background

Dow Chemical is a world-wide leading supplier of plastic resins and material science innovations

As of 2008Annual sales $57.4 billion46,000 employees worldwide150 manufacturing sites in 35 countries Produce 3,300 different products

Business Background

Dow Houston Operations located in Deer Park, TXComplex covers 139 acresProduces and sells more than 500 million pounds of product annually Products are shipped via rail, truck, and

pipelineEmploys more that 375 employees and

contractors.

Business Need

Provide a business database to keep better track of incoming and outgoing shipments of raw materials and product

Keep track of the raw materials used in production of Dow’s products: what vendors the product was purchased from how it was delivered to the company (via truck, train, or

pipeline) how it was delivered to the buyer (via truck, train, or

pipeline) Determine the ROP based on flow of inventory per quarter

CONTEXT DIAGRAM

EXTERNAL ENTITIES

Customer Warehouse Vendor Manager

PROCESSDow Chemical Inventory System

Context Diagram

LEVEL 0 DIAGRAM

EXTERNAL ENTITIES Customer Warehouse Vendor Manager

PROCESSES1. Customer Processing2. Fill Order3. Inventory Verification Process4. Materials Order5. Create Invoice6. Report Processing

DATA STORE Customer Data Orders Merchandise Invoice Data Vendor Data

LEVEL 0 DFD

LEVEL 1 DFD FOR PROCESS 1

PROCESSES 1.1 Create Customer Account 1.2 Retrieve Customer Account

DATA STORE Customer Data

LEVEL 1 DFD FOR PROCESS 1

LEVEL 1 DFD FOR PROCESS 2

PROCESSES 2.1 Order Processing 2.2 Verify Order

DATA STORE Orders

LEVEL 1 DFD FOR PROCESS 2

LEVEL 1 DFD FOR PROCESS 4

PROCESSES 4.1 Order New Materials 2.2 Receive Materials

DATA STORE Vendor Data

LEVEL 1 DFD FOR PROCESS 4

Questions???