Find out what the user requirements are that were used to design and develop the application. Those requirements are the criteria the application must meet.
This is a very big question and have many different answer, one could be
you can check:
1) the data is ok, all the information that show the app are correct
2) the speed of the app is ok, you can acces in the acces point or in the document an the velocity of the document is ok,the document is not slow and stop at any time
3) you dont have any problems script, like circular references or synthetic key in the model of the document
4) you use incremental load to load all the information every day
5) you have a star model in the document, that is that you have one fact table and others are united to this fact table
