Payroll
Payroll system is used when a company want to pay its employees. It is used to calculate wages and print out slips.
Input:
Employees detail (number of hours work)
The processing:
Gross, pay, any deduction,taxes and national insurance.
Output:
The print slip updating, employing file.
Billing system
Input:
All customer detail, how much payment per month, compare the previous and the new bill.
The processing:
Calculate in 1 row (batch)
Output:
Shows detail and update
Automatic stock control system
Rely in the use of barcode. To see the price, stock value, discount, lot of information about that product.use barcode system, EPOS.go back to data base and be updated. A number underneath the barcode usually consist of 4 part: country code, manufacturer's code, product code and check digit. The check digit form of validation which is used to make sure no errors occurred during the reading of the barcode.
Check digits can be calculate in a number of ways. The method discussed here works for codes wich contain 11 digits
1 3 5 7 9 11 Odd digit positions
5 1 0 4 3 1 1 2 0 1 7
2 4 6 8 10 Even digit positions
1. Add together the odd digit position and multiply it by 3
5+0+3+1+0+7: 16
16 x 3 : 48
2. Add together the even digit position
1+4+1+2+1: 9
3. Add the 2 results together
48+9: 57
4. To find the check digit, calculate what needs to be added to 57 to make the next multiple of 10
60, so the check digit is 3
Barcode are use for library book system, passport, burglar alarm system, administration system, ID card, stock control system.
Online booking system
Online booking system needs to update files to prevent double booking. For evpxample cinema, theater, aeroplane. For example booking for cinema they must pick a movie-time, date, seat- show up- search data base for available, show seat, price- enter personal information- choose payment- email sent.
Banking application
ATM ( the replacement of teller, no payment needed)
Insert card-enter PIN-computer check-change PIN, top up mobile, balance, get money- select 1- computer access customer account- customer want receipt or not- card returned.
Disadvantage:
Fake ATM
Place where theft can take place unnotice
Bank charge customer to use ATM
Someone could see our PIN and take all of our money at that bank
Chip and pin
Security
Every restaurant check our money if it is still enough or not to buy or food, bookstore check our PIN. When paying for items using a chip and PIN card, a form of electronic funds transfer take place.
Batch: the payment will be in next month or year, calculate in 1 row
Online: we immidiately pay it right away or straight away.
Library system
If we borrow books from the library, using library system, we can know when should we return the books. Books that has been returned, been scan by the librarian so that the computer can notice it. To borrow the books, first the librarian should know your identity or personal information. When we want to berrow the books, we should tell our name, contec information, the tittle of the book that we want to borrow, the serial number of the books to the librarian.
Expert system
People want to interview if it's done, it enters the system and data is being transfered. It's been program so if it is done, it should be check once again or test it first. It has it's advantage, have a constant answer, efisien time. And it's disadvantage, the answer is depend on books not peoples logic, usually have error, must be test first.
