Dow Chemical
DFD DIAGRAM
PRESENTED BY:
CHRIS WILLIAMS
SUGI TERBISH
CARL SMITH
Business Background
Dow Chemical is a world-wide leading supplier of
plastic resins and material science innovations
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As of 2008
Annual sales $57.4 billion
46,000 employees worldwide
150 manufacturing sites in
35 countries
Produce 3,300 different products
Business Background
 Dow Houston Operations
located in Deer Park, TX
 Complex covers 139 acres
 Produces and sells more than
500 million pounds of
product annually
 Products are shipped via rail, truck, and pipeline
 Employs 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:
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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
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Customer
Warehouse
Vendor
Manager
 PROCESS
Dow Chemical Inventory System
Context Diagram
LEVEL 0 DIAGRAM
 EXTERNAL ENTITIES
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Customer
Warehouse
Vendor
Manager
 PROCESSES
1. Customer Processing
2. Fill Order
3. Inventory Verification
Process
4. Materials Order
5. Create Invoice
6. Report Processing
 DATA STORE
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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???