Following steps should be taken

>Validate the invoice once it is matched for checking any holds..

>If workflow is implemented , Initiate approval for the invoice. Once the invoice is approved/Approrval not required(status in case WF is not implemented) you can go for payments.

>Create accounting after approval of invoice..

Finally for payments you need to format, build
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Before making payment

the following steps should be taken
1. invoice amt, date, qty, quy,
2. invoice duplication or not
3. rectification of any Errors in invoice
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Before hand over the invoice or dispatch the materials
1.we have to receive perchase order from the customer
2.Then PDC cheque, cash or current dated chq for dispatch the materials
3.have to take signature from the customer for the proof of goods recieve
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We must check the invoice thoroughly.
(1) Date of Invoice
(2)Qty,Rate,Tax Levid

Accounts Payable is a short term liability of an organization. It's a process by which a company buys goods and services on credit and is billed in the form of an invoice, which states the terms and conditions of the payment. Accounts Payable is recorded as a current liability in the balance sheet. All accounts paayble entries are to be coded under the right G/L accounts to have an accurate picture of the company's short term liability.

1. Initialization
2. At selection-screen
3. Start-of-selection
4. End-of-selection
5. Top-of-page
6. End-of-page
7. At line-selection
8. At user-command
9. At PF
10. Get
11. At New
12. At LAST
13. AT END
14. AT FIRST

advantages: view is used to retrieve the data very fastly from the database tables
* memory wastage is reduced
* faster than joins to retrieve the data from database tables

disadvantages:
* view is not a container,it will not hold the data
* view memory is not permanent memory

Dispatcher recieves the request from client and assigns the request to one of the work process.
Roll area: Each workprocess works in a particular memory that memory is known as Role Area, which consists of User context and session data.
ABAP- Processor :is an interpretor which can execute logic

OOABAP is used to develop BSP/PCUI applications and also anthing involved object oriented like BADIs, SmartForms..etc.where as ABAP is used to develop traditional programs in R/3.

Structure and table both are 2/2 matrices but there are many differences between table and structure.

1. Table can store the data physically but a structure dose not store.
2. Table can have primary key but a structure dose not have.
3. Table can have the technical attribute but a structure dose not have.

structure doesn't contain technical attributes.
structure doesn't contain primary key.
structure doesn't stores underline database level.

ALV is Application List viewer. Sap provides a set of ALV (ABAP LIST VIEWER) function modules which can be put into use to embellish the output of a report. This set of ALV functions is used to enhance the readability and functionality of any report output. Cases arise in sap when the output of a report contains columns extending more than 255 characters in length. In such cases, this set of ALV functions can help choose selected columns and arrange the different columns from a report output and also save different variants for report display. This is a very efficient tool for dynamically sorting and arranging the columns from a report output. The report output can contain up to 90 columns in the display with the wide array of display options.