An equity partnership in which the parties form a single balance sheet entity, also known as a merged in-source solution. This model can take different legal forms, from buying a service provider, to becoming a subsidiary, to equity-sharing joint ventures. Equity-based partnerships often are born out of a company's need to acquire mission-critical goods and services. Also, these partnerships often require the strategic interweaving of infrastructure and heavy co-investment. Most equity partnerships are in place on a continuing basis and often conflict with the desires of many organizations to create more variable and flexible cost structures on a company's balance sheet.