Which technique will be most important for product acceptance?

BAY Checking and  Accuracy 

The most acceptable technique is quality audit .Audit is the wholistic and systematic examination of the entire product in the functionality, durability, repairabilty, in long and short term bases.Quality is not high price but satisfaction that will make a customers longer loyal.

physical inspection and workability test.

Impact analysis technique  is the most important for product acceptance in this case.