Question

Draw an activity diagram to represent the Purchasing process described below. The Purchasing department of a company handles purchase requests from other departments in the company. Each request is handled by a case worker within the Purchasing department. The case worker receives a request and monitors it until a purchase order is made or until the request is reported to the manager of the department. For the purchase of products with the total cost under $2000, the case worker writes a purchase order, and sends it to one of the approved vendors. For purchase requests over $2000, the case worker must first send them out for bids from several vendors that supply the product. After one week, if there are at least four bids returned, the case worker selects one bid, writes a purchase order, and sends it to the vendor. Otherwise, the case worker reports the request to the manager.

Answer 1

Activity diagram of purchasing process :

From given scenario, there are three main actors involved in purchasing process. Other departments (customers), Purchasing department (Caseworker), Vendors.

The activity diagram of purchasing process is following as :

Activity diagram represents the flow of events by actors(users) actions in order. Flow of events in above activity diagram are :

1. Start ( circle shaded with black colour)
2. Customers send purchase request and caseworker of purchasing department receives requests.
3. If the total cost<$2000 , he(caseworker) request for bids otherwise he directly writes the purchase order.
4. If the total cost>=$2000 , he request the bids from different vendors.
5. Then vendors develop and send the bids to the case worker.
6. Caseworker receives the bids from different vendors. If the bids count is less than 4(received bid<4) , the he(caseworker) report to the manager.
7. If the bids count is greater than or equal to 4 , he select one bid from different bids.
8. Writes the purchase order.
9. Stop ( double circle fill with black colour).