Preliminary Designs & Materials Quantity Estimates Responsive preliminary designs and accurate material quantity estimates for bidding and budget considerations are core commitments that JC Hines & Associates make to each of our clients. The preparation of accurate, comprehensive materials quantity summaries is fundamental to the success of our clients and our growth. Our standard preliminary design package includes the following information: complete project materials summary neat quantity detail for each wall or slope on the site reinforcement schedule and wall profile data for each wall or slope preliminary design summary stating all design parameters, factors of safety, loading conditions and a listing of all plans, specifications and reports used to develop the design.