Cooperative sourcing is a collaboration or negotiation of different companies, which have similar business processes. To save costs, the competitor with the best production function can insource the business process of the other competitors. This is especially common in IT-oriented industries due to low to no variable costs, e.g. banking. Since all of the negotiating parties can be outsourcers or insourcers the main challenge in this collaboration is to find a stable coalition and the company with the best production function. This is difficult since the real production costs are hard to estimate and negotiators might be tempted to portray their real cost much higher than they actually are in order to demand higher fees for insourcing. High switching costs, costs for searching potential cooperative sourcers, and negotiating often result in inefficient solutions.