Self-checkout machine observation
by TIAN TANG
1. 1. Mr.A (Age:20-30; Gender: male; Items: <3)
1.1. Scan membership card; Scan items
1.1.1. Pay by cash
1.1.1.1. Package items with his bag
1.1.1.1.1. Didn't get his receipt
2. 2. Ms.B(Age:15-20; Gender: female; Items: 7)
2.1. No membership card; Scan items
2.1.1. Fail to scan items& Ask for help
2.1.1.1. Scan items under instruction
2.1.1.1.1. Pay by credit card
3. 3. Ms.C(Age: 30-40; Gender: female; Items:10)
3.1. Scan membership card; Find items according to pictures& Scan items
3.1.1. Fail to weigh her items& Try again
3.1.1.1. Finish scanning& finding all items
3.1.1.1.1. Pay by credit card
4. 4. Ms. D& Mr.E(Age: 30-40; Gender: female& male; Items:10-15)
4.1. Scan membership card; Find items according to pictures& Scan items
4.1.1. Finish scanning& finding all items
4.1.1.1. Forget items& return to shopping
4.1.1.1.1. Get their items& Find items according to pictures& Scan items
5. 5. Mr. F(Age: 20-30; Gender: female; Items: 5)
5.1. No membership card& Use staff's membership card; Scan items
5.1.1. Pay by cash
5.1.1.1. Fail to Pay by cash
5.1.1.1.1. Pay by credit card
6. 6. Mr. G(Age: 40-50; Gender: male; Items: 13)
6.1. Scan membership card; Scan items
6.1.1. Fail to scan all items
6.1.1.1. Find the remaining items according to pictures
6.1.1.1.1. Pay by credit card