I create test documentation to our software company. I have a problem with Test Case definition in standard IEE 829-1998. IEEE specifies Test Plan -> Test Design -> Test Case. For our tested application I programme test scenarios that are called with a number of enter data. I would like to document this work but I don't know if I can tell that Test Case = test scenario? I think Test Case has only one enter data and only one output data, for example test cases for calc Sum: TC1 - enter data 1 plus 1 - output data 2; TC2 - enter data 1 plus 2 - output data 3 etc. I think Test Case = test scenario * enter data because test scenario is for example Sum, Multiplying etc.
If you are working within the IEEE guidelines then this is well defined for you. If you are not, then it is up to your company to standardize this. In many locations a Test Case is part of the Test Scenario. In other areas the Test Scenario is the actual steps to validate a Test Case. It is my opinion that a Test Case consists of a scenario to be tested and a set of steps to accomplish that test. There can be as many synchronization points as needed, but only one validation point per Test Case.