Myth. Managing a ... plan in-house on an as needed basis and ... ... projects to multiple vendors will save money and allow more projects to be produced for greater ... Myth. Managing a marketing plan in-house on an as needed basis and distributing individual projects to multiple vendors will save money and allow more projects to be produced for greater results.Fact. According to a survey taken by the National Association of Advertisers, the average cost for a client to change agencies is approximately 12.5% of the client's current budget. This includes the following items:-Short-rated contracts-Transfer of artwork and other files-Out-of-pocket and time costs to conduct a new agency search-Time needed to get the new agency up to speed-Start-up inefficiencies for the new agency as they learn the client's business and procedures Source: Free Articles from ArticlesFactory.com