Ecommerce website design plays an intregal role in the long term performance of site, company and the degree to which your site accomplishes its financial goals. To conduct the complete design process properly, you should begin with the budgeting for the design and development work, consult plenty of recommended and reputable designers, and last of all, make sure the site is able to accomplish its task - which is to sell your product or service to the global market place (usually to a specific niche).