2.1. Designations;
2.2. State
diagram; 2.3. State table;
2.3. State table;
Input
?
Output
Black box
and invalid state transitions.
dynamic
black box
state transitions
?
State 1
State 2
- events (that cause a transition);
Technique: designations. Diagram.
< >
< >
< >
< >
Wait for PIN
2nd try
3rd try
Access
Eaten card
Start
Card inserted
Enter valid PIN
Enter invalid PIN
Enter valid PIN
Enter invalid PIN
Enter valid PIN
Enter invalid PIN
Technique: State diagram
In 10 seconds
Enter invalid PIN
Enter valid PIN
Technique: State diagram
In 10 seconds
Card inserted
Enter valid PIN
Enter valid PIN
Enter invalid PIN
Enter valid PIN
Start
Wait for PIN
2nd try
3rd try
Access
Eaten card
Card inserted
Card inserted
- 2nd row
- 3rd row
- Column
Current state of system;
Technique: State table
Current
state
Event
Next
state
Start
Inserted
card
Wait for PIN
Wait for PIN
Valid
PIN
Access
Wait for PIN
Invalid
PIN
Valid
PIN
Valid
PIN
Invalid
PIN
Invalid
PIN
In 10
seconds
2nd
try
2nd
try
2nd
try
3rd
try
3rd
try
3rd
try
Access
Access
Eaten card
Eaten card
Start
Diagram designations:
designations. Diagram designations
Diagram designations
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