The commonly used test case design techniques are 
Equivallence partitioning
Boundary-value Analysis
Error guessing

business logic based test cases
user interface based testcases
Input domain based testcases

there are two types of test design techniques
they are
1.Boundary value analysis.
2.Equilance class partition.

Boundary value analsys: if there is a range kind of input 
the technique used by the test engineer to dovelop the test 
cases for that range is called as boundary value analsys.

equilance class partition: here the test engineer writes 
the valied and invalied test cases i.e. positive test cases 
and negative test cases.

There are number of test case techniques.
1.Boundary value analysis
2.Equivalence class partitioning
3.Error guessing.
4.Semantic technique
5.Syntactic tecnique
6.Data flow technique.

Test case design techniques are:-

1. Equivalance partitioning.
2. Boundary value analysis.
3. Error guessing.
4. State transition
5. Cause effect graphing.
6. Syntax testing
7. Graph Matrix