Chapter 6 - Purchases and Payments Business Process

Chapter 6 - Purchases and Payments Business Process

1. Basic Purchases B P M N Activity Model

   • Request Prices and Availability
     • Place Purchase Order
       • Receive Items
         • Send Payment

2. Business Rules Examples for Purchases Process

   • Intention
     • Place Order: Order products from reliable suppliers at the best available prices to meet required delivery time
     • Receive Items: Record receipt of items promptly and accurately
   • Access Controls
     • Place Order: Partners preparing purchase orders cannot modify product inventory records, receive items, or pay suppliers
     • Receive Items: Partners receiving items cannot modify purchase orders or inventory records; they cannot view purchase order quantity ordered information
   • Application Controls
     • Place Order: System must provide purchase order number control, default values, range and limit checks, and create audit trail
     • Receive Items: System must only allow partner to enter the number of items received, subject to range and limit checks on quantities received; date of receipt defaults to current date

3. Generic Purchases and Payments Model

   • 1. Each Supplier participates in a minimum of zero and a maximum of many Purchases.
   • 2. Each Purchase involves a minimum of one and a maximum of many Inventory items. Each Inventory item can be purchased zero times or many times. The multiplicities on this association are typical when Inventory is carried at a type of product level, such as when the inventory is identified by U P C code.
   • 3. Each Cash Disbursement (for example, one check) is paid from one and only one Cash account, and each Cash account is associated with a minimum of zero cash disbursements and a maximum of many cash disbursements.
   • 4. The multiplicities on the association between Purchases and Cash Disbursements depend on business policy.

4. Integrating Sales and Purchases Models

   • Resources (Products and Cash) and internal agents (Employees) are shared between processes; Events and external agents are process-specific.