Abstract: In one aspect, computer implemented dynamic evaluation is based on feature tags. As will be described in more detail below, a buyer may be interested in certain features of a product (e.g., color, material, design, lining, warranty, delivery terms, etc.) and the different features are described using feature tags. For custom products, the buyer's specification may be described at least in part by feature tags. Each feature tag may include one or more standardized keywords. The computer-based system can use the feature tag representation of a buyer's order to both search for appropriate products (i.e., appropriate sellers of the product requested by the buyer), and then subsequently to allow the seller to review the performance of the selected buyer. Over time, each seller will receive different reviews from different buyers. These reviews can be stored and the data used to better predict which sellers will be appropriate for a future buyer request.