Difference between Acceptance Testing and Sandwich Testing

1. Acceptance Testing :
Acceptance Testing is done after the system testing. It is done to check whether the software meets the customer requirements or not. It is used by testers, stakeholders as well as clients. It includes only a Functional Testing and it consist of two testing Alpha Testing and Beta Testing.

2. Sandwich Testing :
Sandwich Testing is also called as the hybrid integration testing. It comprise the bottom-up approach testing and top-down approach testing, therefore it uses the advantage of both bottom up approach and top down approach. It also can not be used for those systems which have a lot of interdependence between different modules and it allows parallel testing.

Difference between Acceptance Testing and Sandwich Testing :

S.No.	Acceptance Testing	Sandwich Testing
1.	Acceptance testing is comprises of alpha and beta testing.	Sandwich testing is comprises of Top-down approach and Bottom-up approach.
2.	It generally used to check whether the software meets the customer requirements or not.	It generally focuses on functional verification.
3.	In this, system is checked for random inputs.	In this, system is checked for dummy inputs.
4.	In this, there is need of fewer resources for testing.	In this, there is need of large number of resources.
5.	It does not allow parallel testing.	It allows parallel testing.
6.	It does not matter how big project is.	It is used for very large projects having sub projects.
7.	It is cost efficient.	It is not cost efficient.