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عندي واجب عليه 6 درجات وموعد التسليم 4/12
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http://www.gulfup.com/?LoNMm0
الله يجزاكم خير

ساعدوني تكفون :"(

بس شوفوا صح أو خطأ :"(

 

The purchasing department handles purchase requests from other departments in the company. People in the company who initiate the original purchase request are the “customers” of the purchasing department. A case worker within the purchasing department receives the request and monitors it until it is ordered and received. Case workers process requests for the purchase of products under $1,500, write a purchase order, and then send it to the approved vendor. Purchase requests over $1,500 must first be sent out for bid from the vendor that supplies the product. When the bids return, the case worker selects one bid and then writes a purchase order and sends it to the vendor.

 

 

 

1)    [DFD exercise] For this description, identify:

a.     The process

·      purchase requests

b.    The external entities

·      case worker

·      vendor

·      customer

c.      The data flows

·      write a purchase order (from customer to case worker).

·      process requests for the purchase of products under $1,500 & send to vender (from case worker to vendor).

·      requests over $1,500 must first be sent out for bid (from case worker to vendor).

·      bid return (from vendor to case worker).

·      writes a purchase order and sends it to the vendor (from case worker to vendor).

 

 

 

 

2)    [ERD exercise] For this description, identify:

a.     The data entities

·      case worker

·      vendor

·      customer

·      purchase requests

b.    The relationships between the entities

·      one or many customer can make one or many purchase requests

·      one case worker can receive one or many purchase requests

·      one case worker can sent out for bid to one or many vendor

·      one vendor supplies & send the product to one case worker

 

 

 

3)    [use Case exercise] For this description, identify:

a.     The actors

·      case worker

·      vendor

·      customer

 

b.    The use cases

·      customer

-  initiate the original purchase request

·      case worker

- receives the request

- Process request under $1,500

- over $1,500 sent out for bid

- choose the vendor

- writes a purchase order

·      vendor

- bid return

 

كذا صح ؟؟ :"(