The purpose of this thesis was to examine how the build-up of customer relations can be characterized at the end of the industrial selling process and how companies engage their cross-functional selling teams into this relationship building effort. Through a case study of Omega, a multinational company engaged in the selling of products of an industrial character, it was revealed that the build-up and maintaining of the customer relationship is of acute importance, as it presents the company with a window of opportunities. Through its relationship with the customer the company can be able to sell other products, which are related to the original purchase made by the customer. For the company?s competitors the established relationship might also serve as a barrier when attempting to enter the market or increase market share.