Defferent types of Sample and Definition

Sales Sample: Sales sample made for show the buyer and order collect from buyer by sales sample.  

Pre production Sample: When get the order from buyer then produce pre production sample for
factory. Every man follow pre production sample for work in factory.

Shipment Sample: Shipment sample is very important for factory. When finish the produce and complete the shipment then specially produce shipment sample only for buyer and send him by air.