Please prepare a context diagram describing King Landscaping Services payables processing system. Assume that the processing performed by KLS's Accounts Payable (AP) department are internal to the system, while the processes performed by all the other departments and entities discussed above (Supplier, Materials Department, Authorization Department, Northwest Bank) are external to the system.

Overview:

King Landscaping Service (KLS) is a large landscaping company that designs and installs landscaping for corporate clients. For example, KLS recently installed the new landscaping for a new office complex that is located in Tacoma, WA. The landscape installation involved the construction of footpaths and retaining walls, as well as the planting of many trees and bushes. KLS typically gets almost all of the materials that it uses for landscaping jobs (e.g., rock for pathways, trees, etc.) from supplier companies.

Business Processes:

The processing steps that KLS follows to pay its bills to its supplier companies are described below:

The Accounts Payable (AP) department of KLS receives a supplier invoice directly from its supplier. The supplier invoice is a formal billing statement that tells the AP department what it owes the supplier for a previous purchase. The AP staff compares the billing information shown on the supplier invoice with the information shown on a "stock yard receipt notice." The "stock yard receipt notice" is a document that is prepared by KLS's Materials Department when materials sent by a supplier are received at KLS's stock yard (which is part of the Materials Department). This "stock yard receipt notice" (also known as the "shipping receipt slip," but the more common name is the "stock yard receipt notice") is sent from the Materials Department to the AP department immediately after materials are received at the stock yard. If AP employees find that the charges are accurate -- and if they have the authorization to make the payment -- they produce a payment check that is mailed to the supplier. The authorization decision to make the payment is determined by KLS's Authorization Department. Before each payment check is prepared, the AP department sends a request to the Authorization Department to authorize the payment. The Authorization Department then calculates the amount of funds available and responds to the AP department with a memo which indicates whether or not the payment can be made. At the beginning of each day, the Authorization Department gets the information needed to determine the funds available to spend from KLS's bank (which is named Northwest Bank).