All games should be play tested, and each type of game should be tested in a way that’s suitable and fit for the game designers’ goals. For game wholesalers or any purchasers, actively engaging in playtesting community or knowing playtesting rules can be very benificial.
When making a Board game, there are many different components and materials to choose from. Even in a seemingly simple piece such as a card, the paper used can have different cores, weight, and finish. Boxes are of various thicknesses and sizes as well, depending on how durable you wish the game to be, how big, or the general impression it gives. Miniature, dice, and other components are made from entirely different materials, etc.